[Federal Register Volume 62, Number 115 (Monday, June 16, 1997)]
[Proposed Rules]
[Pages 32564-32578]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-15659]
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DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
50 CFR Part 679
[Docket No. 960206024-7123-02; I.D. 043097A]
RIN 0648-AG32
Fisheries of the Exclusive Economic Zone Off Alaska; At-Sea Scale
Certification Program
AGENCY: National Marine Fisheries Service (NMFS), National Oceanic and
Atmospheric Administration (NOAA), Commerce.
ACTION: Proposed rule; request for comments.
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SUMMARY: NMFS proposes amendments to the regulations implementing the
Fishery Management Plan for Groundfish of the Gulf of Alaska and the
Fishery Management Plan for the Groundfish Fishery of the Bering Sea
and Aleutian Islands Area (FMPs). This proposed regulatory amendment
would implement the requirements for certification and at-sea testing
of scales used to weigh groundfish catch at sea. This action is
intended to promote the objectives of the FMPs.
DATES: Comments must be received by July 16, 1997.
ADDRESSES: Comments on the proposed rule should be sent to Ronald J.
Berg, Chief, Fisheries Management Division, Alaska Region, NMFS, P.O.
Box 21668, Juneau, AK 99802, Attn: Lori J. Gravel, or delivered to the
Federal Building, 709 West 9th Street, Juneau, AK.
Send comments regarding burden estimates or any other aspect of the
data requirements, including suggestions for reducing the burdens, to
NMFS and to the Office of Information and Regulatory Affairs, Office of
Management and Budget (OMB), Washington, D.C. 20503, Attn: NOAA Desk
Officer.
FOR FURTHER INFORMATION CONTACT: Sally Bibb, 907-586-7228.
SUPPLEMENTARY INFORMATION:
Background
Fishing for groundfish by U.S. vessels in the exclusive economic
zone of the Gulf of Alaska (GOA) and the Bering Sea and Aleutian
Islands Management Area (BSAI) is managed by NMFS according to the
FMPs. The FMPs were prepared by the North Pacific Fishery Management
Council (Council) under authority of the Magnuson-Stevens Fishery
Conservation and Management Act (Magnuson-Stevens Act). Fishing by U.S.
vessels is governed by regulations implementing the FMPs at subpart H
of 50 CFR part 600 and 50 CFR part 679.
In 1990 the Council requested that NMFS analyze a requirement to
weigh catch processed at sea. NMFS implemented regulations on May 16,
1994 (59 FR 25346), requiring processor vessels in the pollock
Community Development Quota (CDQ) fisheries to either provide certified
bins for volumetric estimates of catch or scales to weigh catch. In
September 1994, the Council recommended that NMFS require processor
vessels participating in the BSAI pollock fisheries to weigh their
catch before discard or processing. In response to this request, NMFS
published an Advance Notice of Proposed Rulemaking (ANPR), which
requested public comment on a three-part scale evaluation and approval
process on February 20, 1996 (61 FR 6337). Public comment was invited
through March 21, 1996. Comments relevant to this proposed rulemaking
are summarized and responded to below in the ``Response to Comments''
section.
The proposed at-sea scale certification program described in this
rulemaking is designed in response to comments on the ANPR, NMFS
research evaluating the use of scales on processor vessels, further
experience using scales on two processor vessels in the CDQ fisheries,
and the recommendations of a technical advisor hired by NMFS.
NMFS specifically seeks public comment on the proposed process for
determining whether a particular scale is capable of weighing
accurately at sea, the performance and technical requirements in the
At-Sea Scales Handbook, and the proposed procedures for testing scales
at sea.
Specifying Which Processors Must Weigh
This proposed rulemaking does not require specific processors or
vessels to use certified scales to weigh catch at sea. NMFS currently
is considering proposing requirements for at-sea weighing in the
proposed multispecies CDQ fisheries and in the BSAI pollock fisheries
as recommended by the Council. However, a program for inspecting and
certifying scales for use in weighing at sea must be established before
NMFS proceeds with proposed requirements for specific processors or
vessels to weigh catch at sea.
Response to Comments
Six letters were received in response to the request for public
comment on the ANPR. Many of the comments in these letters related to
whether NMFS should require processor vessels in the BSAI pollock
fisheries to weigh catch at
[[Page 32565]]
sea. Eight comments related to specific questions in the ANPR about the
technical or operational aspects of a certified scale program, which is
the subject of this proposed rulemaking. These comments are addressed
below.
Comment 1. Any method of evaluating a scale must first establish
specifications in detail.
Response. NMFS concurs. NMFS hired a technical advisor with
expertise in developing specifications for many different types of
scales to revise the specifications originally proposed in the ANPR.
NMFS believes that the level of detail and the applicability of
performance and technical requirements for scales used to weigh catch
at sea have been improved in the proposed rule and the At-Sea Scales
Handbook. NMFS continues to seek public comment in this regard.
Comment 2. Personnel with the National Type Evaluation Program
(NTEP) do not have the expertise to evaluate at-sea scales.
Response. NMFS concurs that NTEP personnel have not evaluated a
scale designed to compensate for vessel motion, although appropriate
expertise and test procedures could be developed at accredited
laboratories in the future. Unlike the ANPR, the proposed rule would
allow laboratory tests to be conducted at any accredited laboratory.
Comment 3. It is not feasible to use groundfish as a test material
for the initial inspection of motion-compensated belt scales on vessels
because it would require travel to Alaska well in advance of the
fishing seasons to harvest a small amount of fish for the tests.
Response. NMFS concurs. The proposed rule would allow initial and
periodic scale inspections to be conducted at any time during the year
in either Seattle or Dutch Harbor. Because fish would not be available
at the time of initial inspection, the proposed rule would allow the
use of alternative material. However, fish could still be used in daily
materials tests conducted during the fishing seasons.
Comment 4. The fishing industry is unwilling to fund the inspection
and certification program for scales used to weigh catch in the open
access fisheries.
Response. The proposed rule does not include a provision that would
require the fishing industry to pay for scale inspections and
certifications, although provisions to recover the costs of the scale
inspections could be added by NMFS in the future if the collection of
fees for this service were authorized by the Magnuson-Stevens Act. NMFS
would not pay for laboratory tests conducted under type approval
requirements. These tests would be the responsibility of the scale
manufacturer.
Comment 5. Knowledgeable inspectors must be available to conduct
scale tests.
Response. NMFS concurs and intends to designate an agency such as
the State of Alaska, Division of Measurement Standards, to provide
trained personnel to inspect and certify at-sea scales. Weights and
measures inspectors would require little additional training to inspect
hopper scales, platform scales, and hanging scales as they regularly
certify these types of scales for use on land. The inspectors are less
familiar with belt scales. However, the specific requirements listed in
the At-Sea Scales Handbook combined with written procedures for
conducting the inspections would assist the inspectors. In addition,
training on inspecting and certifying belt scales would be provided.
Comment 6. Results of initial experience with motion-compensating
scales are not good.
Response. NMFS has had experience with scales used to weigh catch
on three processor vessels. In one case, the processor vessel installed
the scale voluntarily and used it to monitor product recovery rates.
This processor has reported no problems with the scale in over 5 years
of use. The other two processor vessels installed scales during the
1995 pollock nonroe season in order to comply with regulations
governing the pollock CDQ program. One of these scales was improperly
installed. An initial inspection of the scale as described in this
proposed rule would have identified the installation problem before the
vessel went fishing. The other scale was modified during the fishing
season in a manner that prevented it from weighing accurately.
Education of the vessel crew as to how the scale operates appears to
have resolved this problem.
Since the ANPR was published, NMFS has contracted with a processor
vessel to use a motion-compensated belt scale to evaluate the accuracy
of various methods for making volumetric estimates of catch weight in
the pollock fisheries. The belt scale was tested nearly every day for
approximately 14 weeks and weighed the test material within 3 percent
of its known weight each time it was tested.
Comment 7. Daily tests of the scale would be costly to industry in
terms of the lost production time.
Response. Based on experience testing the scale, NMFS estimates
that the time required for daily scale tests would be 15 minutes or
less. NMFS believes testing the scales each day is necessary to
determine whether they are continuing to weigh accurately at sea.
Comment 8. Only one scale company manufactures a scale reliable
enough to accurately weigh catch at sea. This will result in high costs
for the scale and scale repair and a shortage of qualified technicians.
Response. NMFS agrees that, thus far, only one company has
demonstrated that its scale can weigh large quantities of fish at sea
and pass daily accuracy tests. However, several scale companies are
developing at-sea scales of various types including belt scales and
automatic hopper scales. Implementation of specific performance and
technical requirements is expected to provide the information necessary
for other scale companies to develop competing products.
At-Sea Scale Certification Program
Scales used in commerce in the United States are regulated by state
and local government agencies, based on national standards established
by the National Conference on Weights and Measures (NCWM) and published
by the U.S. Department of Commerce, National Institute for Standards
and Technology (NIST) in Handbook 44. Handbook 44 includes design, use,
and performance standards for many different weighing and measuring
devices, including several different types of scales. Scales used by
processors buying fish in Alaska are required to be certified by the
State of Alaska, Division of Measurement Standards, based on Alaska
regulations and Handbook 44.
Although Handbook 44 contains standards for scales of the general
description of those that will be used to weigh catch at sea (i.e.,
belt, hopper, platform, and hanging scales), it does not provide
adequate standards for at-sea scales for several reasons. First, it
contains no requirement for motion compensation technology, which NMFS
believes is necessary to weigh accurately at sea. Second, it contains
no standards appropriate to evaluate the type of belt scale that has
been designed for use on processor vessels. NMFS believes this type of
scale should be an option for vessel owners. Finally, accuracy
standards or tolerances for scales used in commerce are higher than
NMFS believes can be achieved at sea.
The lack of appropriate standards for at-sea scales led NMFS to
develop the proposed standards for at-sea scale certification in the
At-Sea Scales Handbook. This handbook was prepared by NMFS with the
assistance of a technical advisor who was formerly employed with NIST.
The proposed standards are modeled after
[[Page 32566]]
requirements in Handbook 44 and other international scale standards but
have been modified to reflect the unique environment in which at-sea
weighing will occur.
The proposed rule would add a new Sec. 679.28 to 50 CFR part 679,
titled ``Equipment and Operational Requirements for Catch Weight
Measurement'' and would codify the At-Sea Scales Handbook as Appendix A
to part 679. Section 679.28 would contain vessel owner and operator
responsibilities for scale certification, at-sea testing, and
recordkeeping and reporting and would define a scale certified to weigh
at sea as one that meets the performance and technical requirements in
Appendix A to part 679, the At-Sea Scales Handbook.
Compliance with the performance and technical requirements in the
At-Sea Scales Handbook would be evaluated through both laboratory tests
and scale inspections. First, the model of scale would be tested in a
laboratory to verify that it meets technical requirements and weighs
accurately under some of the environmental factors expected on
commercial fishing and processing vessels. This process is know as
``type evaluation''.
Second, each installed scale would be certified by an inspector
authorized by the Administrator, Alaska Region, NMFS (Regional
Administrator) in initial and periodic inspections. A certified scale
would be required to be recertified each year. In addition, the scale
would have to be recertified if it is modified or removed from the
vessel and reinstalled. Further, to being certified, the scale would be
required to weigh accurately at sea as determined by tests performed
each day by the vessel crew and witnessed by the NMFS-certified
observer.
Compliance with Sec. 679.28 would require successful completion of
all three elements described above. The scale would be required to
successfully meet both the type evaluation and inspection requirements
to be certified. Once certified, the scale would be required to
continue to weigh accurately at sea. A certified scale that did not
pass daily scale performance tests would not comply with the
regulations and an uncertified scale could not be used even if it
passed daily scale tests.
NMFS believes that the three-part scale testing and inspection
process is necessary to prevent the installation and use of equipment
that is not suited for the environment in which it will be used and to
minimize the number of scales that develop problems during a fishery.
The type-evaluation process would evaluate how a scale performs under
laboratory simulation of the at-sea environment--tests that cannot be
performed by a scale inspector on the vessel. Type evaluation also
would provide the vessel owners added assurance that the model of scale
they are purchasing has been designed to perform on a vessel and that
it meets some of the minimum technical and performance requirements for
at-sea scales. The initial and periodic inspections would verify that
each scale installed on a particular vessel complies with all technical
requirements and weighs test material or test weights accurately. The
inspection also would identify improper installations or malfunctioning
scales and verify that the vessel owner has provided the test material
required for the at-sea scale tests. The at-sea scales tests would be
the only tests that would determine whether the scale weighs accurately
at sea. NMFS is not proposing to require laboratory simulation of
vessel motion due to the complexity and cost of this type of testing.
The scale inspections would occur at the dock, under conditions of
minimal vessel motion.
The At-Sea Scales Handbook contains requirements for four different
types of scales that may be used to weigh fish on a vessel. They are
(1) belt scales, (2) automatic hopper scales, (3) platform scales, and
(4) hanging scales. The handbook has a separate section for belt scales
and automatic hopper scales. The requirements for platform and hanging
scales are combined in a third section. Type evaluation requirements
for all scales are included in an annex to Appendix A.
Only these four types of scales could be certified under the
proposed program. No other type of weighing or measuring device could
be certified under this program until certification standards are
developed and added to Sec. 679.28 and Appendix A.
Performance standards and technical requirements for four different
types of scales are necessary because of the many possible applications
for at-sea scales. Belt scales are most appropriate for high volume,
continuous flow operations such as trawl catcher/processors or
motherships. However, these scales may not weigh as accurately in low
volume or discontinuous flow operations such as on longline or pot
catcher/processors. Automatic hopper scales could be used for both
types of operations because they accumulate fish in a hopper until a
certain target weight is reached, then fish are released back onto the
factory line. Platform and hanging scales are included because they
could be used to weigh fish in small quantities.
Type Evaluation
Type evaluation is a one-time test of a model or type of scale to
determine whether the scale meets technical requirements and functions
within specified parameters under the environmental conditions expected
on a vessel. In order to obtain type approval, a scale company would
submit one scale of a particular model or type for laboratory tests. If
that scale met the performance and technical requirements, the
laboratory certification would cover all scales of this particular
model. The proposed regulations would not require laboratory testing of
each individual scale.
One of the most important technical requirements that would be
verified by the laboratory would be whether the scale was designed to
compensate adequately for the effect of motion on the weight indicated
by the scale. NMFS proposes to require that scales be equipped with
automatic means to compensate for the motion of a vessel at-sea in the
form of a reference load cell and a reference mass weight or other
equally effective means. The reference mass weight would be weighed by
the reference load cell and a motion-compensation adjustment factor
would be calculated and applied to the fish weight. For example, assume
that the reference mass weight actually weighed 10 kg, but the motion
of the vessel was such that the reference load cell sensed that it
weighed only 9.9 kg. In this case, the scale would adjust the weight of
the fish it was weighing by the same ratio as the indicated error in
the reference weight (see sections 2.3.2.6, 3.3.4.3, and 4.3.2.3 in the
At-Sea Scales Handbook). Scale manufacturers who wish to use a
different but at least as effective means of motion-compensation as
described above would be required to provide NMFS with laboratory or
field test results demonstrating that the scale is capable of weighing
accurately at sea.
One scale manufacturer has submitted laboratory test results to
NMFS for a motion-compensated belt-conveyor scale. The tests were
performed at a Danish laboratory and would comply with many of the
requirements proposed in this rulemaking. Other types of motion-
compensated scales would have to be submitted to a laboratory for
evaluation, which could take up to 3 months to complete. Certification
of successful completion of laboratory tests would be required before
the an inspector could test and certify a scale installed on a vessel.
Requirements for the laboratory tests are contained in two
different areas of the handbook. Requirements specific to
[[Page 32567]]
a particular type of scale are found in sections 2, 3, and 4. Test
procedures common to all scales are found in the annex to the handbook.
For example, section 2 contains specific requirements for belt scales.
Section 2.2 contains performance standards for belt scales. Section
2.2.1 contains the maximum permissible errors (mpe) for tests of the
belt scale and section 2.2.1.1 contains the mpes for the laboratory
tests of the belt scale. Similarly, section 3.2.1.1 contains the mpes
for the laboratory tests of automatic hopper scales and section 4.2.1.1
contains the mpes for laboratory tests for platform and hanging scales.
The laboratory tests, described in the annex, are divided into
disturbance tests and influence quantity tests. Disturbances refer to
events that may occur while the scale is being used, but that are not
within the rated operating conditions of the scale, such as short time
power reduction, power bursts, electrostatic discharge, and
electromagnetic susceptibility. Influence quantities refer to factors
that may affect the accuracy of the scale weight and are within the
rated operating conditions of the scale, such as temperature, humidity,
and power voltage fluctuations.
Each scale submitted for type evaluation would be tested for
disturbances and influence quantities based on the performance
requirements of applicable sections of the handbook and on the test
procedures in the annex. The scales also would be evaluated for
compliance with the technical requirements in each section, such as
scale markings, printed output, display units and capacity, permanence
of marking, event loggers to record scale adjustments, and means to
retain information in memory in the event of a power loss.
Complete, signed type-evaluation certification documents would be
required to be received by the Regional Administrator before any scale
of the particular model could undergo an initial inspection by the
authorized inspector. The Regional Administrator would maintain a list
of scales that had successfully completed type-evaluation requirements
and make this list available to the public upon request. The type-
evaluation certification documents would include an application form,
checklists to verify compliance with all performance and technical
requirements, and test report forms to record the results of specific
tests. NMFS would provide the blank forms to scale manufacturers,
laboratories, and vessel owners upon request.
Laboratories certifying compliance with type-evaluation
requirements would have to be accredited by the U.S. Government or by
the government of the country in which the laboratory is located. For
example, in the United States, a laboratory may be accredited by
programs recognized by the NIST such as the National Voluntary
Laboratory Accreditation Program. Information about laboratory
accreditation must be provided on the type evaluation certification
documents and would be evaluated by the Regional Administrator through
consultation with NIST or the national weights and measures agency of
the country in which the laboratory is located.
The performance and technical requirements for laboratory tests for
belt scales specified in the At-Sea Scales Handbook are based, in part,
on the International Organization of Legal Metrology's (OIML)
international recommendations for continuous totalizing automatic
weighing instruments (R-50). Manufacturers of belt scales may request
that the Regional Administrator accept laboratory tests performed to
demonstrate compliance with OIML R-50 standards in lieu of laboratory
tests in the At-Sea Scales Handbook. These manufacturers would have to
submit written and signed copies of the laboratory test results. Any
requirements in the At-Sea Scales Handbook that are not in the OIML R-
50 standards would be required to be verified by an independent
laboratory. NMFS would have these requests reviewed by a technical
advisor to verify that the proposed laboratory test results met the
requirements of the At-Sea Scales Handbook.
NMFS seeks public comment on whether existing laboratory
certification processes in the United States or elsewhere could
similarly be used in lieu of the proposed type evaluation certification
requirements for automatic hopper scales, platform scales, or hanging
scales. Comments must specifically address the source of the
alternative laboratory test specifications and the type of
certification documents that could be accepted by NMFS.
Initial and Periodic Inspections
The initial inspection of each scale installed on a vessel would be
performed by an authorized weights and measures inspector designated by
the Regional Administrator based on the performance and technical
requirements in the At-Sea Scales Handbook. The inspector would
complete certification forms including a checklist and test report
forms. The vessel owner would be required to maintain a copy of the
scale certification documents on the vessel at all times when a
certified at-sea scale was required to be used and to submit a copy to
NMFS. NMFS would maintain a list of vessels with current scale
certifications.
The initial inspection would occur while the vessel is in drydock
or tied up in either Seattle or Dutch Harbor. The vessel owner would be
responsible to schedule inspections with the authorized weights and
measures inspectors designated by the Regional Administrator. The
vessel owner would be required to give the scale inspectors at least 10
working day's notice prior to the inspection to allow for scheduling
and travel from anchorage to Seattle or Dutch Harbor. At the time of
the inspection, the vessel owner would be required to assist the
inspector in moving test equipment to and from the inspector's vehicle
and the location on the vessel where the scale is installed.
Each scale would be inspected to determine compliance with
technical requirements such as level installation; proper marking of
information such as name, model designation, and serial number; the
required indicators and printer; and the proper sealing of adjustable
components. A ``zero test'' would be performed on all scales to
determine whether the scale accumulated weight while empty.
Each scale would be tested for accuracy based on the procedures
appropriate for the particular type of scale. Belt scales would be
tested with a ``materials test'' in which an amount of material would
be first weighed on a certified scale to determine its known weight and
then weighed on the belt scale. The difference between the known weight
and the weight indicated by the belt scale would be the error of the
belt scale. Belt scales would be required to weigh material to within 1
percent of its known weight in the initial and periodic inspections in
stationary installations.
Automatic hopper scales, platform scales, and hanging scales would
be tested by placing standard test weights in or on the scale in
different amounts and locations. These scales would be required to
weigh the standard test weights to within 1 percent of their known
weight. All test material and weights needed for scales tests during
the inspection would be provided by the scale inspector.
Each scale would be tested to determine compliance with
requirements for printed output. Printed output of the catch weight
including vessel name and Federal fisheries or processor permit number,
haul or set number, date and time weighing catch
[[Page 32568]]
from haul or set started and ended, and the weight of fish in each haul
or set would be required for all scales. In addition, a printed record
of any tests, adjustments, calibrations, or other procedures performed
on the scale including month, day, year, and time of procedure, name or
description of procedure, and result of procedure would be required.
The inspector also would verify that the test material required to be
provided by the vessel owner for the at-sea scale tests was on board
the vessel and in compliance with requirements discussed below.
Each scale would be required to be certified every year, within 12
months of the date of the most recent certification. An inspection also
would be required if the scale is moved to a different location on the
vessel, undergoes major modifications, or is reinstalled after being
removed from the vessel.
At-Sea Scale Tests
At-sea scale tests would be required to determine whether the scale
weighed accurately in motion. Tests would be performed each day by the
vessel crew and witnessed by the observer. Each scale would be required
to weigh the test material within 3 percent of its known weight. If the
scale did not meet this performance standard, it would be required to
be recalibrated or repaired and retested. Any material or test weights
required for the at-sea tests would be provided and maintained by the
vessel owner. Test material other than fish or any standard test
weights that will be used to test the scale at sea must be inspected
and approved by the authorized weights and measures inspector at the
time of initial or periodic inspections.
The vessel operator may conduct the scale test at any time that
does not interfere with the observer's sampling or related duties,
however, the observer must be notified of a test at least 15 minutes
before it is conducted and the observer must be present for the test.
The observer would not be required to determine the time of the test or
to perform any of the physical labor associated with the test.
Classification
The Assistant General Counsel for Legislation and Regulation of the
Department of Commerce certified to the Chief Counsel for Advocacy of
the Small Business Administration that this proposed rule, if adopted,
would not have a significant economic impact on a substantial number of
small entities, as follows:
The proposed rule would establish a testing and certification
program for scales to weigh catch at sea in the groundfish fisheries
off Alaska. It does not include any requirements for specific
vessels or processors to install or use at-sea scales.
Because there are no requirements imposed on vessel operators or
processors, it does not affect the way they do business. There are
no compliance costs, and there will be no impact on revenues. It
merely establishes a procedure to be used in the future, if such
requirements are imposed on vessels and/or processors. Therefore, no
Initial Regulatory Flexibility Analysis was prepared.
This proposed rule has been determined to be not significant for
purposes of E.O. 12866.
This proposed rule contains a new collection-of-information
requirement subject to review and approval by OMB under the Paperwork
Reduction Act (PRA). This collection-of-information requirement has
been submitted to OMB for approval. The new information requirements
include the following: (1) Scale manufacturers must submit completed
At-Sea Scales Type Evaluation Certification documents to the Regional
Administrator prior to being placed on the list of eligible at-sea
scales; (2) vessel owners must submit a copy of the scale certification
document issued by a scale inspector approved by the Regional
Administrator to NMFS prior to participating in a fishery in which a
certified at-sea scale is required; (3) vessel operators must maintain
a record of the results of daily at-sea scale tests; and (4) vessel
operators must maintain printed output from the scale. The public
reporting burden for this collection of information is estimated to
average 176 hours per response for the type evaluation certification
documents, 15 minutes per response to submit the scale certification to
NMFS, 45 minutes per response for the at-sea scale tests, and 3 minutes
per response for the printed output from the scale. These estimates
include the time for reviewing instructions, searching existing data
sources, gathering and maintaining the data needed, and completing and
reviewing the collection of information. Send comments regarding these
burden estimates or any other aspect of the data requirements including
suggestions for reducing the burden, to NMFS (see ADDRESSES) and to the
Office of Information and Regulatory Affairs, OMB, Washington, DC 20503
(Attention: NOAA Desk Officer).
Public comment is sought regarding: Whether this proposed
collection of information is necessary for the proper performance of
the functions of the agency, including whether the information has
practical utility; the accuracy of the burden estimate; ways to enhance
the quality, utility, and clarity of the information to be collected;
and ways to minimize the burden of the collection of information,
including through the use of automated collection techniques or other
forms of information technology.
Notwithstanding any other provision of the law, no person is
required to respond to, nor shall any person be subject to a penalty
for failure to comply with, a collection-of-information subject to the
requirements of the PRA, unless that collection-of-information displays
a currently valid OMB control number.
The Regional Administrator determined that fishing activities
conducted under this rule will not affect endangered and threatened
species listed or critical habitat designated pursuant to the
Endangered Species Act in any manner not considered in prior
consultations on the groundfish fisheries of the GOA or BSAI.
List of Subjects in 50 CFR Part 679
Fisheries, Reporting and recordkeeping requirements.
Dated: June 10, 1997.
David L. Evans,
Deputy Assistant Administrator for Fisheries, National Marine Fisheries
Service.
For the reasons set out in the preamble, 50 CFR part 679 is
proposed to be amended as follows:
PART 679--FISHERIES OF THE EXCLUSIVE ECONOMIC ZONE OFF ALASKA
1. The authority citation for part 679 continues to read as
follows:
Authority: 16 U.S.C. 773 et seq., 1801 et seq., and 3631 et seq.
Sec. 679.27 [Reserved]
2. In subpart B, Sec. 679.27 is reserved.
3. In subpart B, Sec. 679.28 is added to read as follows:
Sec. 679.28 Equipment and operational requirements for catch weight
measurement.
(a) Applicability. This section contains the requirements for
motion-compensated, NMFS-certified scales to weigh catch at sea. This
section applies only to vessels required to use at-sea scales elsewhere
in the regulations.
(b) At-sea scales certification program--(1) List of eligible at-
sea scales. The model of scale must be on the Regional Administrator's
list of eligible at-sea scales before an inspector will test or certify
a scale installed on a vessel under paragraph (b)(2) of this section. A
scale will be included on the list of eligible at-sea scales when the
[[Page 32569]]
Regional Administrator receives the information specified in paragraph
(b)(1) (i) or (ii) of this section from a testing laboratory accredited
by the government of the country in which the tests are conducted. Each
model of scale on the list of eligible at-sea scales will be assigned a
NMFS type evaluation certification number by the Regional
Administrator.
(i) Type evaluation certification documents. The following
information must be submitted on forms provided by the Regional
Administrator.
(A) Type Evaluation Certificate--(1) Information about the scale.
(i) Name of scale manufacturer.
(ii) Name of manufacturer's representative.
(iii) Mailing address of scale manufacturer and manufacturer's
representative.
(iv) Telephone and facsimile number of manufacturer's
representative.
(v) Model of scale.
(vi) Serial number of scale being tested.
(vii) Type of scale, choosing among belt, automatic hopper,
platform or hanging scale.
(2) Information about the certifying laboratory. (i) Name of
laboratory. (ii) Mailing address of laboratory. (iii) Telephone and
facsimile number of laboratory's representative. (iv) Name and address
of government agency accrediting the laboratory. (v) Name and signature
of person responsible for type evaluation certification and date of
signature.
(B) Type Evaluation Checklist. The certifying laboratory's
representative must indicate on the Type Evaluation Checklist form
whether the scale met applicable performance and technical requirements
specified in Appendix A (At-Sea Scales Handbook).
(C) Type Evaluation Test Report Forms. The certifying laboratory's
representative must provide the results of each applicable test
specified in Appendix A (At-Sea Scales Handbook) on the Type Evaluation
Test Report Form.
(ii) Alternative type evaluation certification documents. Scale
manufacturers may request that the Regional Administrator consider
tests performed on belt scales to meet the International Organization
of Legal Metrology's recommendations for continuous totalizing
automatic weighing instruments (OIML R-50) in accuracy class 2 as a
substitute for the requirements specified in Appendix A (At-Sea Scales
Handbook). The Regional Administrator will review these proposals to
determine whether the proposed test procedures and results comply with
the requirements in paragraph (b)(1) of this section.
(2) At-sea scale inspection certificate. Each scale or scale system
used to weigh catch at sea must be tested and certified by a scale
inspector authorized by the Regional Administrator upon initial
installation. The scale must be recertified each year within 12 months
of the date of the most recent certification. The scale also must be
certified after major modification or installation of the scale at a
different location on the vessel. An at-sea scale inspection
certificate will be issued by the inspector if the scale meets all
applicable requirements specified in Appendix A (At-Sea Scales
Handbook). In order to obtain an at-sea scale inspection certification,
the vessel owner must:
(i) Make the vessel and scale available for inspection by a scale
inspector authorized by the Regional Administrator after the vessel
owner has installed a model of scale on the Regional Administrator's
list of eligible at-sea scales described in paragraph (b)(1) of this
section. The time and place of the inspection may be arranged by
contacting the authorized scale inspectors. Scale inspections will be
scheduled no later than 10 working days after the day that the vessel
owner requests an inspection. Identity of authorized scale inspectors
can be obtained from NMFS.
(ii) Transport test weights, test material, and equipment required
to perform the test to and from the inspector's vehicle and the
location on the vessel where the scale is installed.
(iii) Apply test weights to the scale or convey test materials
across the scale, as requested by the scale inspector.
(iv) Assist the scale inspector in performing the scale inspection
and testing.
(v) Submit a copy of scale certification documents signed by the
weights and measures inspector to the Regional Administrator and
maintain a copy of these documents on board the vessel at all times
when the processor or vessel is required to use a certified scale.
These documents must be made available to the observer, NMFS personnel,
or an authorized officer upon request.
(vi) Make test material or test weights required for the at-sea
scale tests under paragraph (b)(3)(ii) of this section available to the
inspector at the time of the inspection.
(3) At-sea scale tests. Each scale or scale system used to weigh
catch at sea must be tested each 24-hour period in which fish are
weighed on the scale to verify that the scale is weighing test material
within 3 percent of its known weight. The vessel operator must:
(i) Notify the observer at least 15 minutes before the test will be
conducted and conduct the test while the observer is present.
(ii) Provide and maintain the following equipment or materials to
conduct the test on board the vessel at all times while a daily test is
required.
(A) Belt scales. The vessel operator must provide one of the
following to conduct a daily materials test.
(1) At least 400 kg of fish whose weight has been determined to the
nearest kg on a scale other than the scale under test. The scale used
to determine the known weight of the fish must weigh test weights to
within 1 percent of their known weight, or
(2) At least 400 kg of test material whose weight has been
determined to the nearest kg on a scale certified under this section or
certified by a state or local weights and measures official. The test
material must be described in writing. If the test material is
comprised of more than one package or unit of test material, each unit
must have a unique identification number or letter, and weight of the
unit indelibly marked on the exterior of the unit. The identification
number and weight of each unit of test material must be certified in
writing by the authorized scale inspector at the time of initial or
periodic inspection. Replacement units of test material manufactured on
board the vessel must be marked and weighed on a scale that meets the
requirements of paragraph (b)(3)(ii)(A)(1) of this section. The NMFS-
certified observer must witness the weighing of the replacement test
material. Written information including the date the replacement
material was weighed, the identification number and weight of the
replacement material, and the identification number and weight of test
material being replaced must be signed by the vessel operator and
maintained with the original scale certification documents on the
vessel.
(B) Other Types of Scales. The vessel operator must provide
certified test weights in an amount equal to the largest amount of fish
that will be weighed on the scale in one weighment. Each test weight
must have its weight stamped on or otherwise permanently affixed to it.
The weight of each test weight must be verified annually at the initial
or periodic scale inspection required under paragraph (b)(2) of this
section by the authorized weights and measures inspector.
(iii) Conduct the scale test by placing the test material or test
weights on or across the scale and recording the
[[Page 32570]]
following information on the at-sea scale test report form.
(A) Vessel name.
(B) Month, day, and year of test.
(C) Time test started to the nearest minute.
(D) Known weight of test material or test weights.
(E) Weight of test material or test weights recorded by scale.
(F) Percent error as determined by subtracting the known weight of
the test material or test weights from the weight recorded on the
scale, dividing that amount by the known weight of the test material or
test weights, and multiplying by 100.
(iv) Verify that the percent error in each scale test as determined
in paragraph (b)(3)(iii)(F) of this section is less than or equal to 3
percent. If the error exceeds this amount the scale may be retested,
recalibrated, or repaired. A scale test verifying that the scale is
weighing accurately must be conducted and recorded before the vessel
can continue weighing catch.
(v) Maintain the test report form on board the vessel until the end
of the fishing year during which the tests were conducted and make the
report forms available to observers, NMFS personnel, or an authorized
officer. In addition, the scale test report forms must be retained by
the vessel owner for 3 years after the end of the fishing year during
which the tests were performed. All scale test report forms must be
signed by the vessel operator.
(4) Scale maintenance. The vessel operator must maintain the scale
in proper operating condition throughout the period of its use and
assure that adjustments made to the scale are made so as to bring the
performance errors as close as practicable to a zero value.
(5) Printed reports from the scale. Printed reports from the scale
must be maintained on board the vessel until the end of the fishing
year during which the reports were made and be made available to
observers, NMFS personnel, or an authorized officer. In addition,
printed reports must be retained by the vessel owner for 3 years after
the end of the fishing year during which the printouts were made. All
printed reports from the scale must be signed by the vessel operator.
(i) Reports of catch weight. Reports must be printed at least once
each 24-hour period in which the scale is being used to weigh catch or
before any information stored in the scale computer memory is replaced.
The printed catch report must include the information specified in
Appendix A, sections 2.3.1.8, 3.3.1.7, or 4.3.1.5. The haul or set
number recorded on the scale print-out must correspond with haul or set
numbers recorded in the processor's daily cumulative production
logbook. Scale weights indicated by the scale may not be adjusted.
(ii) Printed report of scale tests or adjustments. The printed
report must include the information specified in Appendix A, sections
2.3.1.11(b), 3.3.1.12(b), and 4.3.1.8(b). 3. Appendix A to Part 679 is
added to read as follows:
Appendix A to Part 679--At-Sea Scales Handbook: Performance and
Technical Requirements for At-Sea Scales in the Groundfish Fisheries
off Alaska
Table of Contents
1.0 Introduction
2.0 Belt Scales
2.1 Applicability
2.2 Performance Requirements
2.2.1 Maximum Permissible Errors (mpe)
2.2.1.1 Laboratory Tests
2.2.1.2 Zero Load Tests
2.2.1.3 Material Tests
2.2.2 Minimum Flow Rate (Qmin)
2.2.3 Minimum Totalized Load (min)
2.2.4 Influence Quantities
2.2.4.1 Temperature
2.2.4.2 Power Supply
2.3 Technical Requirements
2.3.1 Indicators and Printers
2.3.1.1 General
2.3.1.2 Values Defined
2.3.1.3 Units
2.3.1.4 Value of the Scale Division
2.3.1.5 Range of Indication
2.3.1.6 Resettable
2.3.1.7 Rate of Flow Indicator
2.3.1.8 Printed Information
2.3.1.9 Permanence of Markings
2.3.1.10 Power Loss
2.3.1.11 Adjustable Components
2.3.2 Weighing Elements
2.3.2.1 Speed Measurement
2.3.2.2 Conveyer Belt
2.3.2.3 Overload Protection
2.3.2.4 Speed Control
2.3.2.5 Adjustable Components
2.3.2.6 Motion Compensation
2.3.3 Installation Conditions
2.3.4 Marking
2.3.4.1 Presentation
2.4 Tests
2.4.1 Minimum Test Load
2.4.2 Laboratory Tests
2.4.2.1 Influence Quantity and Disturbance Tests
2.4.2.2 Zero Load Tests
2.4.2.3 Material Tests
2.4.3 Initial and Periodic Scale Inspections
2.4.3.1 Zero Load Tests
2.4.3.2 Material Tests
3.0 Automatic Hopper Scales
3.1 Applicability
3.2 Performance Requirements
3.2.1 Maximum Permissible Errors (mpe)
3.2.1.1 Laboratory Tests
3.2.1.2 Increasing and Decreasing Load Tests
3.2.2 Minimum Weighment (min)
3.2.3 Minimum Totalized Load (Lot)
3.2.4 Influence Quantities
3.2.4.1 Temperature
3.2.4.2 Power Supply
3.3 Technical Requirements
3.3.1 Indicators and Printers
3.3.1.1 General
3.3.1.2 Values Defined
3.3.1.3 Units
3.3.1.4 Value of the Scale Division
3.3.1.5 Weighing Sequence
3.3.1.6 Printing Sequence
3.3.1.7 Printed Information
3.3.1.8 Permanence of Markings
3.3.1.9 Range of Indication
3.3.1.10 Non-resettable Values
3.3.1.11 Power Loss
3.3.1.12 Adjustable Components
3.3.1.13 Zero-Load Adjustment
3.3.1.14 Damping Means
3.3.2 Interlocks and Gate Control
3.3.3 Overfill Sensor
3.3.4 Weighing Elements
3.3.4.1 Overload Protection
3.3.4.2 Adjustable Components
3.3.4.3 Motion Compensation
3.3.5 Installation Conditions
3.3.6 Marking
3.3.6.1 Presentation
3.4 Tests
3.4.1 Standards
3.4.2 Laboratory Tests
3.4.2.1 Influence Quantity and Disturbance Tests
3.4.2.2 Performance Tests
3.4.3 Initial and Periodic Scale Inspections
4.0 Platform Scales and Hanging Scales
4.1 Applicability
4.2 Performance Requirements
4.2.1 Maximum Permissible Errors (mpe)
4.2.1.1 Laboratory Tests
4.2.1.2 Increasing and Decreasing Load and Shift Tests
4.2.2 Minimum Load
4.2.3 Influence Quantities
4.2.3.1 Temperature
4.2.3.2 Power Supply
4.3 Technical Requirements
4.3.1 Indicators and Printers
4.3.1.1 General
4.3.1.2 Values Defined
4.3.1.3 Units
4.3.1.4 Value of the Scale Division
4.3.1.5 Printed Information
4.3.1.6 Permanence of Markings
4.3.1.7 Power Loss
4.3.1.8 Adjustable Components
4.3.1.9 Zero-Load Adjustment
4.3.1.10 Damping Means
4.3.2 Weighing Elements
4.3.2.1 Overload Protection
4.3.2.2 Adjustable Components
4.3.2.3 Motion Compensation
4.3.3 Installation Conditions
4.3.4 Marking
4.3.4.1 Presentation
4.4 Tests
4.4.1 Standards
4.4.2 Laboratory Tests
4.4.2.1 Influence Quantities and Disturbance Tests
4.4.2.2 Performance Tests
4.4.3 Initial and Periodic Scale Inspections
5.0 Definitions
Annex A to Appendix A of Part 679--Influence Quantity and
Disturbance Tests
[[Page 32571]]
A.1 General
A.2 Test considerations
A.3 Tests
A.3.1 Static Temperatures
A.3.2 Damp Heat, Steady State
A.3.3 Power Voltage Variation
A.3.4 Short Time Power Reduction
A.3.5 Bursts
A.3.6 Electrostatic Discharge
A.3.7 Electromagnetic Susceptibility
1.0 Introduction
(a) This handbook contains the performance and technical
requirements for scales required under 50 CFR part 679 to weigh, at
sea, catch from the groundfish fisheries off Alaska. These
commercial fisheries are managed under the Fishery Management Plan
for Groundfish of the Gulf of Alaska and the Fishery Management Plan
for the Groundfish Fishery of the Bering Sea and Aleutian Islands
Area which were prepared by the North Pacific Fishery Management
Council under the Magnuson-Stevens Fishery Conservation and
Management Act (16 U.S.C. 1801, et seq.).
(b) This handbook was prepared by the National Marine Fisheries
Service, Alaska Regional Office, with the assistance of a contracted
technical advisor. The performance and technical requirements in
this document have not been reviewed or endorsed by the National
Conference on Weights and Measures. The handbook is published by
NMFS because specifications for scales used to weigh at sea have not
been developed by any national or international weights and measures
agency or organization.
(c) Revisions, amendments, or additions to this document may be
made by notification in the Federal Register and an opportunity for
public comment prior to a final decision on the amendments. Persons
wishing to propose amendments should submit proposals in writing to
the Administrator, Alaska Region, NMFS, P.O. Box 21668, Juneau, AK
99802.
(d) Types of scales covered by handbook--This handbook contains
performance and technical requirements for four types of scales.
Section 2 contains requirements for belt scales. Section 3 contains
requirements for automatic hopper scales. Section 4 contains
requirements for platform and hanging scales. Certification of any
other devices for use to weigh catch at sea will require an
amendment to Sec. 679.28 and this handbook (Appendix A).
(e) Testing and Certification Requirements for At-Sea Scales--
Scales used to weigh catch at sea are required to comply with
performance and technical requirements in four categories:
(1) Type evaluation or laboratory tests of each model of scale,
(2) initial inspection by an authorized weights and measures
inspector of each scale installed on a vessel; (3) periodic re-
inspection by an authorized weights and measures inspector; and (4)
at-sea tests of the scale's accuracy performed by vessel crew and
witnessed by a NMFS-certified observer. This handbook contains only
the performance and technical requirements for type evaluation and
certification by a weights and measures inspector. Regulations
implementing the requirements in this handbook and additional
requirements for scales certified to weigh catch at sea are found at
Sec. 679.28.
2.0 Belt Scales
2.1 Applicability. The requirements in this section apply to a
scale or scale system that employs a conveyor belt in contact with a
weighing element to determine the weight of a bulk commodity being
conveyed across the scale.
2.2 Performance Requirements--2.2.1 Maximum Permissible Errors
(mpe). The following mpes are specified for laboratory tests and
initial and periodic inspections of scales in a stationary
installation. A stationary vessel refers to a vessel that is tied up
at a dock or anchored near shore and is not under power at sea.
2.2.1.1 Laboratory Tests. Procedures for disturbance tests and
influence factors are in Annex A. The following mpes are specified
for these tests.
a. Disturbances. The mpe is 0.18 percent of the
weight of the load totalized.
b. Influence Factors. The mpe is 0.25 percent of the
weight of the load totalized.
c. Temperature Effect at Zero Flow Rate. The difference between
the values obtained at zero flow rate taken at temperatures that
differ by 10 deg. C must not be greater than 0.035 percent of the
weight of the load totalized at the maximum flow-rate for the time
of the test.
2.2.1.2 Zero Load Tests. The mpe for zero load tests conducted
in a laboratory or on a scale installed on a stationary vessel is
0.1 percent or 1 scale division (d).
2.2.1.3 Material Tests. The mpe for material tests conducted in
a laboratory or on a scale installed on a stationary vessel is
1.0 percent of the known weight of the test material.
2.2.2 Minimum Flow Rate (Qmin). The minimum flow rate must be
specified by the manufacturer and must not be greater than 35
percent of the rated capacity of the scale in kilograms (kg) or
metric tons per hour (mt/hr).
2.2.3 Minimum Totalized Load (min). The minimum
totalized load must not be less than the greater of:
a. 2 percent of the load totalized in 1 hour at the maximum flow
rate,
b. the load obtained at the maximum flow rate in 1 revolution of
the belt, or
c. a load equal to 800 scale divisions (d).
2.2.4 Influence Quantities. The following requirements apply to
influence factor tests conducted in the laboratory.
2.2.4.1 Temperature. A belt scale must comply with the
performance and technical requirements at a range of temperatures
from -10 deg. C to +40 deg. C. However, for special applications the
temperature range may be different, but the range must not be less
than 30 deg. C and must be so specified on the descriptive markings.
2.2.4.2 Power Supply. A belt scale must comply with the
performance and technical requirements when operated within a range
of -15 percent to +10 percent of the power supply specified on the
descriptive markings.
2.3 Technical Requirements.
2.3.1 Indicators and Printers.
2.3.1.1 General. A belt scale must be equipped with a primary
indicator in the form of a master weight totalizer, a printer, and a
rate of flow indicator. It must also be equipped with auxiliary
means to indicate or print values for specified partial loads. The
indications and printed representations must be clear, definite,
accurate, and easily read under any conditions of normal operation
of the belt scale.
2.3.1.2 Values Defined. If indications or printed
representations are intended to have specific values, these must be
defined by a sufficient number of figures, words, or symbols,
uniformly placed with reference to the indications or printed
representations and as close as practicable to the indications or
printed representations, but not so positioned as to interfere with
the accuracy of reading.
2.3.1.3 Units. The weight units indicated must be in terms of
kilograms.
2.3.1.4 Value of the Scale Division. The value of the scale
division (d) expressed in a unit of weight must be equal to 1, 2, or
5, or a decimal multiple or sub-multiple of 1, 2, or 5.
2.3.1.5 Range of Indication. The master weight totalizer must
be capable of indicating at least 99,999,999 kilograms. The
auxiliary means must be capable of indicating at least the weight of
the amount of fish that can be harvested in 1 haul or set.
2.3.1.6 Resettable. The master weight totalizer must not be
resettable to zero without breaking a security means. The auxiliary
means to indicate or print specified partial loads must be
resettable to zero.
2.3.1.7 Rate of Flow Indicator. Permanent means must be
provided to produce an audio or visual signal when the rate of flow
is less than the minimum flow rate or greater than 98 percent of the
maximum flow rate.
2.3.1.8 Printed Information. The information printed must
include:
a. For fish weight:
i. the Federal fisheries or processor permit number;
ii. the haul or set number;
iii. month, day, year, and time (to the nearest minute) weighing
catch from the haul or set started;
iv. month, day, year, and time (to the nearest minute) weighing
catch from the haul or set ended; and
v. the total cumulative weight of catch in the haul or set for
each haul or set.
b. For the event logger: information specified in Section
2.3.1.11.b.
2.3.1.9 Permanence of Markings. All required indications,
markings, and instructions must be distinct and easily readable and
must be of such character that they will not tend to become
obliterated or illegible.
2.3.1.10 Power Loss. In the event of a power failure, means
must be provided to retain in a memory the totalized load.
2.3.1.11 Adjustable Components.
a. An adjustable component that can affect the performance of
the scale must be held securely in position and must not be capable
of adjustment without breaking a security means, or
b. An audit trail in the form of an event logger must provide
the following information in electronic and printed form:
[[Page 32572]]
1. a unique identifying number from 000 to 999 to identify the
type of adjustment being made to any parameter that affects the
performance of the scale,
2. the parameter and amount of change,
3. the source of the change, and
4. the date and time (to the nearest minute) of the change.
2.3.2 Weighing Elements.
2.3.2.1 Speed Measurement. A belt scale must be equipped with
means to accurately sense the belt travel and/or speed whether the
belt is loaded or empty.
2.3.2.2 Conveyer Belt. The weight per unit length of the
conveyor belt must be practically constant. Belt joints must be such
that there are no significant effects on the weighing results.
2.3.2.3 Overload Protection. The load receiver must be equipped
with means so that an overload of 150 percent or more of the
capacity must not affect the metrological characteristics of the
belt scale.
2.3.2.4 Speed Control. The speed of the belt must not vary by
more than 5 percent of the nominal speed.
2.3.2.5 Adjustable Components. An adjustable component that can
affect the performance of the belt scale must be held securely in
position and must not be capable of adjustment without breaking a
security means.
2.3.2.6 Motion Compensation. A belt scale must be equipped with
automatic means to compensate for the motion of a vessel at sea so
that the weight values indicated are within the maximum permissible
errors. Such means shall be a reference load cell and a reference
mass weight or other equally effective means. When equivalent means
are utilized, the manufacturer must provide NMFS with laboratory or
field test results demonstrating that the scale can weigh accurately
at sea.
2.3.3 Installation Conditions. A belt scale must be rigidly
installed in a level condition.
2.3.4 Marking. A belt scale must be marked with the following:
a. Name, initials, or trademark of the manufacturer or
distributer.
b. Model designation.
c. Non-repetitive serial number.
d. Maximum flow rate (Qmax).
e. Minimum flow rate (Qmin).
f. Minimum totalized load (min).
g. Belt speed.
h. Weigh length.
i. Maximum capacity (Max).
j. Temperature range (if applicable).
k. Mains voltage.
2.3.4.1 Presentation. The markings must be reasonably permanent
and of such size, shape, and clarity to provide easy reading in
normal conditions of use. They must be grouped together in a place
visible to the operator.
2.4 Tests.
2.4.1 Minimum Test Load. The minimum test load must be the
greater of:
a. 2 percent of the load totalized in 1 hour at the maximum flow
rate,
b. the load obtained at maximum flow rate in one revolution of
the belt, or
c. a load equal to 800 scale divisions.
2.4.2 Laboratory Tests.
2.4.2.1 Influence Quantity and Disturbance Tests. Tests must be
conducted according to Annex A and the results of these tests must
be within the values specified in section 2.2.1.1.
2.4.2.2 Zero Load Tests. A zero load test must be conducted for
a time equal to that required to deliver the minimum totalized load
(min). At least two zero load tests must be conducted prior
to a material test. The results of these tests must be within the
values specified in section 2.2.1.2.
2.4.2.3 Material Tests. At least one material test must be
conducted with the weight of the material or simulated material
equal to or greater than the minimum test load. The results of these
tests must be within the values specified in section 2.2.1.3.
2.4.3 Initial and Periodic Scale Inspections.
2.4.3.1 Zero Load Tests. A zero load test must be conducted for
a time equal to that required to deliver the minimum totalized load
(min). At least one zero load test must be conducted prior
to each material test. The results of this test must be within the
values specified in section 2.2.1.2.
2.4.3.2 Material Tests. At least one material or simulated
material test must be conducted with the weight of the material or
simulated material equal to or greater than the minimum test load.
The results of these tests must be within the values specified in
section 2.2.1.3.
3.0 Automatic Hopper Scales
3.1 Applicability. The requirements in this section apply to a
scale or scale system that is designed for automatic weighing of a
bulk commodity in predetermined amounts.
3.2 Performance Requirements--3.2.1 Maximum Permissible Errors
(mpe). The following mpes are specified for laboratory tests and
initial and periodic inspections of scales in a stationary
installation. A stationary vessel refers to a vessel that is tied up
at a dock or anchored near shore and is not under power at sea.
3.2.1.1 Laboratory Tests. Procedures for disturbance tests and
influence factors are in Annex A. The following mpes are specified
for these tests.
a. Disturbances. Significant fault (sf) (1 scale
division).
b. Influence Factors. The mpe is 0.1 percent of test
load.
3.2.1.2 Increasing and Decreasing Load Tests. The mpe for
increasing and decreasing load tests conducted in a laboratory or on
a scale installed on a stationary vessel is 1.0 percent
of the test load.
3.2.2 Minimum Weighment (min). The minimum weighment
must not be less than 20 percent of the weighing capacity, or a load
equal to 100 scale intervals (d), except for the final weighment of
a lot.
3.2.3 Minimum Totalized Load (Lot). The minimum totalized load
must not be less than 4 weighments.
3.2.4 Influence Quantities. The following requirements apply to
influence factor tests conducted in the laboratory.
3.2.4.1 Temperature. A hopper scale must comply with the
metrological and technical requirements at temperatures from
-10 deg. C to +40 deg. C. However, for special applications the
temperature range may be different, but the range must not be less
than 30 deg. C and must be so specified on the descriptive markings.
3.2.4.1.1 Operating Temperature. A hopper scale must not
display or print any usable weight values until the operating
temperature necessary for accurate weighing and a stable zero-
balance condition have been attained.
3.2.4.2 Power Supply. A hopper scale must comply with the
performance and technical requirements when operated within -15
percent to +10 percent of the power supply specified on the
descriptive markings.
3.3 Technical Requirements--3.3.1 Indicators and Printers--
3.3.1.1 General. A hopper scale must be equipped with an indicator
and a printer that indicates and prints the weight of each load and
a no-load reference value and also the total accumulated weight of a
lot. It must also be equipped with auxiliary means to indicate or
print values for a final partial load. The indications and printed
information must be clear, definite, accurate, and easily read under
any conditions of normal operation of the hopper scale.
3.3.1.2 Values Defined. If indications or printed
representations are intended to have specific values, these must be
defined by a sufficient number of figures, words, or symbols,
uniformly placed with reference to the indications or printed
representations and as close as practicable to the indications or
printed representations but not so positioned as to interfere with
the accuracy of reading.
3.3.1.3 Units. The weight units indicated must be in terms of
kilograms.
3.3.1.4 Value of the Scale Division. The value of the scale
division (d) expressed in a unit of weight must be equal to 1, 2, or
5, or a decimal multiple or sub-multiple of 1, 2, or 5.
3.3.1.5 Weighing Sequence. For hopper scales used to receive
(weigh in), the no-load reference value must be determined and
printed only at the beginning of each weighing cycle. For hopper
scales used to deliver (weigh out), the no-load reference value must
be determined and printed only after the gross load weight value for
each weighing cycle has been indicated and printed.
3.3.1.6 Printing Sequence. Provision must be made so that all
weight values are indicated until the completion of the printing of
the indicated values.
3.3.1.7 Printed Information. The information printed must
include:
a. For fish weight:
i. The Federal fisheries or processor permit number.
ii. The haul or set number.
iii. Month, day, year, and time (to the nearest minute) that
weighing catch from the haul or set started.
iv. Month, day, year, and time (to the nearest minute) that
weighing catch from the haul or set ended.
v. Net weight of the individual loads and the totalized weight
of the fish in a haul or set.
b. For the event logger: Information specified in Section
3.3.1.12.b.
3.3.1.8 Permanence of Markings. All required indications,
markings, and instructions must be distinct and easily readable and
must be of such character that
[[Page 32573]]
they will not tend to become obliterated or illegible.
3.3.1.9 Range of Indication. The total accumulated weight
indicator and printer must be capable of indicating and printing at
least 99,999,999 kg. The auxiliary means must be capable of
indicating at least the weight of the amount of fish that can be
harvested in 1 haul or set.
3.3.1.10 Non-resettable Values. The totalized accumulated
weight must not be resettable to zero without breaking a security
means.
3.3.1.11 Power Loss. In the event of a power failure, means
must be provided to retain in a memory the total accumulated weight.
3.3.1.12 Adjustable Components.
a. An adjustable component that can affect the performance of
the hopper scale must be held securely in position and must not be
capable of adjustment without breaking a security means, or
b. An audit trail in the form of an event logger must provide
the following information in electronic and printed form:
1. A unique identifying number from 000 to 999 to identify the
type of adjustment being made to any parameter that affects the
performance of the scale.
2. The parameter and amount of change.
3. The source of the change.
4. The date and time (to the nearest minute) of the change.
3.3.1.13 Zero-Load Adjustment. A hopper scale must be equipped
with a manual or semi-automatic (push-button) means that can be used
to adjust the zero-load balance or no-load reference value.
3.3.1.13.1 Manual. A manual means must be operable or
accessible only by a tool outside of, or entirely separate from,
this mechanism or enclosed in a cabinet.
3.3.1.13.2 Semi-automatic. A semi-automatic means must only be
operable when the indication is stable within 1 scale
division, and cannot be operated during a weighing cycle
(operation).
3.3.1.14 Damping Means. A hopper scale must be equipped with
effective automatic means to bring the indications quickly to a
readable stable equilibrium. Effective automatic means must also be
provided to permit the recording of weight values only when the
indication is stable within plus or minus one scale division.
3.3.2 Interlocks and Gate Control. A hopper scale must have
operating interlocks so that:
a. Product cannot be weighed if the printer is disconnected or
subject to a power loss.
b. The printer cannot print a weight if either of the gates
leading to or from the weigh hopper is open.
c. The low paper sensor of the printer is activated.
d. The system will operate only in the sequence intended.
e. If the overfill sensor is activated, this condition is
indicated to the operator and printed.
3.3.3 Overfill Sensor. The weigh hopper must be equipped with
an overfill sensor that will cause the feed gate to close, activate
an alarm, and stop the weighing operation until the overfill
condition has been corrected.
3.3.4 Weighing Elements.
3.3.4.1 Overload Protection. The weigh hopper must be equipped
with means so that an overload of 150 percent or more of the
capacity of the hopper must not affect the metrological
characteristics of the belt scale.
3.3.4.2 Adjustable Components. An adjustable component that can
affect the performance of the hopper scale must be held securely in
position and must not be capable of adjustment without breaking a
security means.
3.3.4.3 Motion Compensation. A hopper scale must be equipped
with automatic means to compensate for the motion of a vessel at sea
so that the weight values indicated are within the maximum
permissible errors. Such means shall be a reference load cell and a
reference mass weight or other equally effective means. When
equivalent means are utilized, the manufacturer must provide NMFS
with laboratory or field test results demonstrating that the scale
can weigh accurately at sea.
3.3.5 Installation Conditions. A hopper scale must be rigidly
installed in a level condition.
3.3.6 Marking. A hopper scale must be marked with the
following:
a. Name, initials, or trademark of the manufacturer or
distributer.
b. Model designation.
c. Non-repetitive serial number.
d. Maximum capacity (Max).
e. Minimum capacity (min).
f. Minimum totalized load (min).
g. Minimum weighment.
h. Value of the scale division (d).
i. Temperature range (if applicable).
j. Mains voltage.
3.3.6.1 Presentation. Descriptive markings must be reasonably
permanent and grouped together in a place visible to the operator.
3.4 Tests.
3.4.1 Standards. The error of the standards used must not
exceed 25 percent of the mpe to be applied.
3.4.2 Laboratory Tests.
3.4.2.1 Influence Quantity and Disturbance Tests. Tests must be
conducted according to Annex A and the results of these tests must
be within the values specified in section 3.2.1.1.
3.4.2.2 Performance Tests. Performance tests must be conducted
as follows:
a. Increasing load test. At least five increasing load tests
must be conducted with test loads at the minimum load, at a load
near capacity, and at 2 or more critical points in between.
b. Decreasing load test. A decreasing load test must be
conducted with a test load approximately equal to one-half capacity
when removing the test loads of an increasing load test.
3.4.3 Initial and Periodic Scale Inspections.
At least two increasing load tests and two decreasing load tests
must be conducted as specified in 3.4.2.2. Additionally, tests must
be conducted with test loads approximately equal to the weight of
loads at which the scale is normally used.
4.0 Platform Scales and Hanging Scales
4.1 Applicability. The requirements in this section apply to
platform and hanging scales.
4.2 Performance Requirements.
4.2.1 Maximum Permissible Errors (mpe). The following mpes are
specified for laboratory tests and initial and periodic inspections
of scales in a stationary installation. A stationary vessel refers
to a vessel that is tied up at a dock or anchored near shore and is
not under power at sea.
4.2.1.1 Laboratory Tests. Procedures for disturbance tests and
influence factors are in Annex A. The following mpes are specified
for these tests.
a. Disturbances. Significant fault (1 scale
division)
b. Influence Factors. Mpes are in Table 1 below.
4.2.1.2 Increasing and Decreasing Load and Shift Tests. The
mpes for increasing and decreasing load and shift tests conducted in
a laboratory or on a scale installed on a stationary vessel are in
Table 1.
Table 1
------------------------------------------------------------------------
Test load in scale divisions (d) Maximum permissible
------------------------------------------------ error (d)
------------------------
Type
Class III Class IIII Evaluation In-
and Initial service
verification
------------------------------------------------------------------------
0 < m* 500 0 < m 50 0.5 1
500 < m 50 < m 200 1.0 2
2000
2000 < m 200 < m 1.5 3
------------------------------------------------------------------------
* Mass or weight of the test load.
[[Page 32574]]
4.2.2 Minimum Load: Class III scale 20 d, Class III scale 10
d.
4.2.3 Influence Quantities. The following requirements apply to
influence factor tests conducted in the laboratory.
4.2.3.1 Temperature. A scale must comply with the performance
and technical requirements at temperatures from -10 deg. C to
+40 deg. C. However, for special applications the temperature range
may be different, but the range must not be less than 30 deg. C and
must be so specified on the descriptive markings.
4.2.3.1.1 Operating Temperature. A scale must not display or
print any usable weight values until the operating temperature
necessary for accurate weighing and a stable zero-balance condition
have been attained.
4.2.3.2 Power Supply. A scale must comply with the performance
and technical requirements when operated within -15 percent to +10
percent of the power supply specified on the descriptive markings.
4.3 Technical Requirements--4.3.1 Indicators and Printers--
4.3.1.1 General. A scale must be equipped with an indicator and a
printer. The indications and printed information must be clear,
definite, accurate, and easily read under any conditions of normal
operation of the scale.
4.3.1.2 Values Defined. If indications or printed
representations are intended to have specific values, these must be
defined by a sufficient number of figures, words, or symbols,
uniformly placed with reference to the indications or printed
representations and as close as practicable to the indications or
printed representations, but not so positioned as to interfere with
the accuracy of reading.
4.3.1.3 Units. The weight units indicated must be in terms of
kilograms and decimal subdivisions.
4.3.1.4 Value of the Scale Division. The value of the scale
division (d) expressed in a unit of weight must be equal to 1, 2, or
5, or a decimal multiple or sub-multiple of 1, 2, or 5.
4.3.1.5 Printed Information. The information printed must
include:
a. For fish weight:
i. The Federal fisheries or processor permit number.
ii. The haul or set number.
iii. Month, day, year, and time (to the nearest minute) of
weighing.
iv. Net weight of the fish.
v. For the event logger: information specified in section
4.3.1.8.
4.3.1.6 Permanence of Markings. All required indications,
markings, and instructions must be distinct and easily readable and
must be of such character that they will not tend to become
obliterated or illegible.
4.3.1.7 Power Loss. In the event of a power failure, means
must be provided to retain in a memory the weight of the last
weighment if it is a non-repeatable weighment.
4.3.1.8 Adjustable Components.
a. An adjustable component that can affect the performance of
the scale must be held securely in position and must not be capable
of adjustment without breaking a security means, or
b. An audit trail in the form of an event logger must provide
the following information in electronic and printed form:
1. A unique identifying number from 000 to 999 to identify the
type of adjustment being made to any parameter that affects the
performance of the scale.
2. The parameter and amount of change.
3. The source of the change.
4. The date and time (to the nearest minute) of the change.
4.3.1.9 Zero-Load Adjustment. A scale must be equipped with a
manual or semi-automatic (push-button) means that can be used to
adjust the zero-load balance or no-load reference value.
4.3.1.9.1 Manual. A manual means must be operable or accessible
only by a tool outside of or entirely separate from this mechanism
or enclosed in a cabinet.
4.3.1.9.2 Semi-automatic. A semi-automatic means must meet the
provisions of 3.1.8 or must only be operable when the indication is
stable within 1 scale division and cannot be operated
during a weighing cycle (operation).
4.3.1.10 Damping Means. A scale must be equipped with effective
automatic means to bring the indications quickly to a readable
stable equilibrium. Effective automatic means must also be provided
to permit the recording of weight values only when the indication is
stable within plus or minus one scale division.
4.3.2 Weighing Elements--4.3.2.1 Overload Protection. The scale
must be so designed that an overload of 150 percent or more of the
capacity must not affect the metrological characteristics of the
scale.
4.3.2.2 Adjustable Components. An adjustable component that can
affect the performance of the scale must be held securely in
position and must not be capable of adjustment without breaking a
security means.
4.3.2.3 Motion Compensation. A hopper scale must be equipped
with automatic means to compensate for the motion of a vessel at sea
so that the weight values indicated are within the maximum
permissible errors. Such means shall be a reference load cell and a
reference mass weight or other equally effective means. When
equivalent means are utilized, the manufacturer must provide NMFS
with laboratory or field test results demonstrating that the scale
can weigh accurately at sea.
4.3.3 Installation Conditions. A platform scale must be rigidly
installed in a level condition. A hanging scale must be freely
suspended from a fixed support or a crane when in use.
4.3.4 Marking. A scale must be marked with the following:
a. Name, initials, or trademark of the manufacturer or
distributer.
b. Model designation.
c. Non-repetitive serial number.
d. Maximum capacity (Max).
e. Minimum capacity (min).
f. Temperature range (if applicable).
g. Mains voltage.
4.3.4.1 Presentation. Descriptive markings must be reasonably
permanent and grouped together in a place visible to the operator.
4.4 Tests.
4.4.1 Standards. The error of the standards used must not
exceed 25 percent of the mpe applied.
4.4.2 Laboratory Tests--4.4.2.1 Influence Quantities and
Disturbance Tests. Tests must be conducted according to Annex A and
the results of these tests must be within the values specified in
section 4.2.1.1.
4.4.2.2 Performance Tests. Performance tests must be conducted
as follows:
a. Increasing load test. At least five increasing load tests
must be conducted with test loads at the minimum load, at a load
near capacity, and at 2 or more critical points in between.
b. Shift test (platform scales only). A shift test must be
conducted during the increasing load test at one-third capacity test
load centered in each quadrant of the platform.
c. Decreasing load test. A decreasing load test must be
conducted with a test load approximately equal to one-half capacity
when removing the test loads of an increasing load test.
4.4.3 Initial and Periodic Scale Inspections.
At least two increasing load tests, shift tests, and decreasing
load tests must be conducted as specified in 4.4.2.2. Additionally
tests must be conducted with test loads approximately equal to the
weight of loads at which the scale is normally used. The results of
all tests must be as specified in Table 1.
5.0 Definitions
Audit trail--An electronic count and/or information record of
the changes to the values of the calibration or configuration
parameters of a device.
Automatic Hopper Scale--A hopper scale adapted to the automatic
weighing of a bulk commodity (fish) in predetermined amounts.
Capacities vary from 50 lb (22.7 kg) to 100,000 lb (45.36 mt).
Generally equipped with a control panel, with functions to be set by
an operator, including the start of an automatic operation. (See
definition of hopper scale).
Belt Scale--A scale that employs a conveyor belt in contact with
a weighing element to determine the weight of a bulk commodity being
conveyed. It is generally a part of a system comprised of an input
conveyor, the flow scale, and an output conveyor. The conveyor belt
may be constructed of various materials, including vulcanized
rubber, canvas, and plastic. The capacity is generally specified in
terms of the amount of weight that can be determined in a specified
time, and can vary from for example 1 ton per hour to 100 or more
tons per hour. An operator generally directs the flow of product
onto the input conveyor.
Calibration Mode--A means by which the span of a scale can be
adjusted by placing a known ``test weight'' on the scale and
manually operating a key on a key board.
Disturbances--An influence that may occur during the use of a
scale but is not within the rated operating conditions of the scale.
Event logger--A form of audit trail containing a series of
records where each record contains the number from the event counter
corresponding to the change to a
[[Page 32575]]
sealable parameter, the identification of the parameter that was
changed, the time and date when the parameter was changed, and the
new value of the parameter.
Final Weighment--The last partial load weighed on a hopper scale
that is part of the weight of many loads (haul, set, etc.).
Hanging Scale--A scale that is designed to weigh a load that is
freely suspended from an overhead crane or it may be permanently
installed in an overhead position. The load receiver may be a part
of the scale such as a pan suspended on chains, or simply a hook
that is used to ``pick-up'' the container of the commodity to be
weighed. The technology employed may be mechanical, electro-
mechanical, or electronic. The loads can be applied either manually
or by such means as a crane.
Hopper Scale--A scale designed for weighing individual loads of
a bulk commodity (fish). The load receiver is a cylindrical or
rectangular container mounted on a weighing element. The weighing
element may be mechanical levers, a combination of levers and a load
cell, or all load cells. The capacity can vary from 50
lb (22.7 kg) to > 100,000 lb (45.36 mt). The loads are applied from
a bulk source by such means as a conveyor or storage hopper. Each
step of the weighing process, that is the loading and unloading of
the weigh hopper, is controlled by an operator.
Indicator--That part of a scale that indicates the quantity that
is being weighed.
Influence Factor--A value of an influence quantity, e.g.,
10 deg., that specifies the limits of the rated operating conditions
of the scale.
Influence Quantity--A quantity that is not the subject of the
measurement but which influences the measurement obtained within the
rated operating conditions of the scale.
Influence Quantity and Disturbance Tests--Type evaluation tests
conducted in a laboratory to determine the capability of the scale
under test to perform correctly in the environmental influences in
which they are used and when subjected to certain disturbances that
may occur during the use of the scale.
Initial Verification--The first evaluation (inspection and test)
of a production model of a weighing instrument that has been type
evaluated to determine that the production model is consistent with
the model that had been submitted for type evaluation.
Known Weight Test--A test in which the load applied is a test
weight with a known value simulating the weight of the material that
is usually weighed.
Load Receiver--That part of the scale in which the quantity is
placed when being weighed.
Material Test--A test using a material that is the same or
similar to the material that is usually weighed, the weight of which
has been determined by a scale other than the scale under test.
Maximum flow-rate--The maximum flow-rate of material specified
by the manufacturer at which a belt scale can perform correctly.
Minimum flow-rate--The minimum flow-rate specified by the
manufacturer at which a belt scale can perform correctly.
Minimum Load--The smallest weight load that can be determined by
the scale that is considered to be metrologically acceptable.
Minimum Totalized Load--The smallest weight load that can be
determined by a belt scale that is considered to be metrologically
acceptable.
Minimum Weighment--The smallest weight that can be determined by
a hopper scale that is considered to be metrologically acceptable.
Motion Compensation--The means used to compensate for the motion
of the vessel at sea.
No-load Reference Value--A weight value obtained by a hopper
scale when the load receiver (hopper) is empty of the product that
was or is to be weighed.
Non-repeatable Weighment--A process where the product after
being weighed is disposed with in such a manner that it cannot be
retrieved to be reweighed.
Number of Scale Divisions (n)--The number of scale divisions of
a scale in normal operation. It is the quotient of the scale
capacity divided by the value of the scale division. n = Max/d
Performance Requirements--A part of the regulations or standards
that applies to the weighing performance of a scale, e.g., maximum
permissible errors.
Performance Test--A test conducted to determine that the scale
is performing within the maximum permissible errors applicable.
Periodic Verification--A verification of a weighing instrument
at an interval that is specified by regulation or administrative
ruling.
Platform Scale--A scale by the nature of its physical size,
arrangement of parts, and relatively small capacity (generally 500
lb (226.8 kg) or less) that is adapted for use on a bench or counter
or on the floor. Load receiver dimensions include, for example, 5
x 5 inches (12.25 x 12.24 cm), 18 x 24 inches (45.7 x 61.0
cm), and 30 x 30 inches (76.2 x 76.2 cm). A platform scale can
be self contained, that is, the indicator and load receiver and
weighing elements are all comprised of a single unit, or the
indicator can be connected by cable to a separate load receiver and
weighing element. The technology used may be mechanical, electro-
mechanical, or electronic. Loads are applied manually.
Rated Capacity--The maximum flow-rate in terms of weight per
unit time specified by the manufacturer at which a belt scale can
perform correctly.
Scale Division (d)--The smallest digital subdivision in units of
mass that is indicated by the weighing instrument in normal
operation.
Sealing--A method used to prevent the adjustment of certain
operational characteristics or to indicate that adjustments have
been made to those operational characteristics.
Security Seals or Means--A physical seal such as a lead and wire
seal or a key or code that when a change is made in the operating or
performance characteristics of a scale it becomes evident.
Significant Fault--An error greater than the value specified for
a particular scale. For a belt scale: A fault greater than 0.18
percent of the weight value equal to the minimum totalized load. For
all other scales: 1 scale division (d). A significant fault does not
include faults that result from simultaneous and mutually
independent causes in the belt scale; faults that imply the
impossibility of performing any measurement; transitory faults that
are momentary variations in the indications that cannot be
interpreted, memorized, or transmitted as a measurement result;
faults so serious that they will inevitably be noticed by those
interested in the measurement.
Simulated Material Test--A test in which the load applied is
test material simulating the weight of the material that is usually
weighed.
Simulated Test--A test in which the weight indications are
developed by means other than weight, e.g., a load cell simulator.
Stationary Installation--An installation of a scale in a
facility on land or a vessel that is tied-up to a dock or in dry
dock.
Subsequent Verification--Any evaluation of a weighing instrument
following the initial verification.
Suitability for Use--A judgement that must be made that certain
scales by nature of their design are appropriate for given weighing
applications.
Technical Requirements--A part of the regulations or standards
that applies to the operational functions and characteristics of a
scale, e.g., capacity, scale division, tare.
Testing Laboratory--A facility for conducting type evaluation
examinations of a scale that can establish its competency and
proficiency by such means as ISO Guide 25, ISO 9000, EN 45011,
NVLAP, NTEP).
Type Evaluation--A process for evaluating the compliance of a
weighing instrument with the appropriate standard or regulation.
User Requirements--A part of the regulations or standards that
applies to the operator/owner of the scale.
Weighment--A single complete weighing operation.
Annex A to Appendix A--Influence Quantity and Disturbance Tests
A.1 General--Included in this Annex are tests that are intended
to ensure that electronic scales can perform and function as
intended in the environment and under the conditions specified. Each
test indicates, where appropriate, the reference condition under
which the intrinsic error is determined.
A.2 Test Considerations
A.2.1 All electronic scales of the same category must be
subjected to the same performance test program.
A.2.2 Tests must be carried out on fully operational equipment
in their normal operational state. When connected in other than a
normal configuration, the procedure must be mutually agreed to by
NMFS and the applicant.
A.2.3 When the effect of one factor is being evaluated, all
other factors are to be held relatively constant, at a value close
to normal.
A.2.3.1 The temperature is deemed to be practically constant
when the difference between the extreme temperatures noted during
the test does not exceed 5 deg. C and the variation in time does not
exceed 5 deg. C per hour.
[[Page 32576]]
A.2.4 Energize the equipment under test (EUT) for a period of
time at least equal to the warm-up time specified by the
manufacturer and maintain throughout the duration of the test.
A.3 Tests
------------------------------------------------------------------------
Characteristics Conditions
Test under test applied
------------------------------------------------------------------------
A.3.1 Static temperatures...... Influence factor... mpe
A.3.2 Damp heat, steady state.. Influence factor... mpe
A.3.3 Power voltage variation.. Influence factor... mpe
A.3.4 Short time power Disturbance........ sf
reduction.
A.3.5 Bursts................... Disturbance........ sf
A.3.6 Electrostatic discharge.. Disturbance........ sf
A.3.7 Electromagnetic Disturbance........ sf
susceptibility.
------------------------------------------------------------------------
A.3 Tests
A.3.1 Static Temperatures
Test method: Dry heat (non condensing) and cold.
Object of the test: To verify compliance with the applicable
maximum permissible under conditions of high and low temperature.
Reference to standard: See Bibliography (1).
Test procedure in brief: The test consists of exposure of the
EUT to the high and low temperatures specified in section 2.2.4.1
for belt scales, section 3.2.4.1 for automatic hopper scales, and
section 4.2.3.1 for platform scales and hanging scales, under ``free
air'' condition for a 2-hour period after the EUT has reached
temperature stability. The EUT must be tested during a weighing
operation consisting of:
For belt scales--the totalization of the
min, 2 times each at approximately the minimum
flow rate, an intermediate flow rate, and the maximum flow rate.
For platform, hanging, and automatic hopper scales--tested with
at least five different test loads or simulated loads under the
following conditions:
a. At a reference temperature of 20 deg.C following
conditioning.
b. At the specified high temperature, 2 hours after achieving
temperature stabilization.
c. At the specified low temperature, 2 hours after achieving
temperature stabilization.
d. At a temperature of 5 deg. C, 2 hours after achieving
temperature stabilization.
e. After recovery of the EUT at the reference temperature of
20 deg. C.
Test severities: Duration: 2 hours.
Number of test cycles: At least one cycle.
Maximum allowable variations:
All functions must operate as designed.
All indications must be within the applicable maximum
permissible errors.
Conduct of test: Refer to the International Electrotechnical
Commission (IEC) Publications mentioned in Bibliography (1) for
detailed test procedures.
Supplementary information to the IEC test procedures
Preconditioning: 16 hours.
Condition of EUT: Normal power supplied and ``on'' for a time
period equal to or greater than the warm-up time specified by the
manufacturer. Power is to be ``on'' for the duration of the test.
Adjust the EUT as close to a zero indication as practicable
prior to the test.
Test sequence:
Stabilize the EUT in the chamber at a reference temperature of
20 deg. C. Conduct the tests as specified in the test procedure in
brief and record the following data:
a. Date and time.
b. Temperature.
c. Relative humidity.
d. Test load.
e. Indication.
f. Errors.
g. Functions performance.
Increase the temperature in the chamber to the high temperature
specified. Check by measurement that the EUT has reached temperature
stability and maintain the temperature for 2 hours. Following the 2
hours, repeat the tests and record the test data indicated above.
Reduce the temperature in the chamber as per the IEC procedures
to the low temperature specified. After temperature stabilization,
allow the EUT to soak for 2 hours. Following the 2 hours, repeat the
tests and record the test data as indicated above.
Raise the temperature in the chamber as per the IEC procedures
to 5 deg. C. After temperature stabilization, allow the EUT to soak
for 2 hours. Following the 2 hours, repeat the tests and record the
test data as indicated above. Note: This test relates to a -10 deg.
C to +40 deg. C range. For special ranges, it may not be necessary.
Raise the temperature in the chamber as per the IEC procedures
and to the 20 deg. C reference temperature. After recovery, repeat
the tests and record the test data as indicated above.
A.3.2 Damp Heat, Steady State
Test method: Damp heat, steady state.
Object of the test: To verify compliance with the applicable
maximum permissible errors under conditions of high humidity and
constant temperature.
Reference to standard: See Bibliography (2).
Test procedure in brief: The test consists of exposure of the
EUT to a constant temperature at the upper limit of the temperature
range and a constant relative humidity of 85 percent for a two day
period. The EUT must be tested during a weighing operation
consisting of:
For belt scales--the totalization of the
min, 2 times each at approximately the minimum
flow rate, an intermediate flow rate, and the maximum flow rate.
For platform, hanging, and automatic hopper scales--tested with
at least five different test loads or simulated loads at a reference
temperature of 20 deg. C and a relative humidity of 50 percent
following conditioning, and at the upper limit temperature and a
relative humidity of 85 percent, 2 days following temperature and
humidity stabilization.
Test severities:
Temperature: upper limit.
Humidity: 85 percent (non-condensing).
Duration: 2 days.
Number of test cycles: At least one test.
Maximum allowable variations:
All functions must operate as designed.
All indications must be within the applicable maximum
permissible errors.
Conduct of the test: Refer to the IEC Publications mentioned in
Bibliography (2) for detailed test procedures.
Supplementary information to the IEC test procedures
Preconditioning: None required.
Condition of EUT:
Normal power supplied and ``on'' for a time period equal to or
greater than the warm-up time specified by the manufacturer. Power
is to be ``on'' for the duration of the test.
The handling of the EUT must be such that no condensation of
water occurs on the EUT.
Adjust the EUT as close to a zero indication as practicable
prior to the test.
Test sequence:
Allow 3 hours for stabilization of the EUT at a reference
temperature of 20 deg. C and a relative humidity of 50 percent.
Following stabilization, conduct the tests as specified in the test
procedures in brief and record the following data:
a. Date and time.
b. Temperature.
c. Relative humidity.
d. Test load.
e. Indication.
f. Errors.
g. Functions performance.
Increase the temperature in the chamber to the specified high
temperature and a relative humidity of 85 percent. Maintain the EUT
at no load for a period of 2 days. Following the 2 days, repeat the
tests and record the test data as indicated above.
Allow full recovery of the EUT before any other tests are
performed.
A.3.3 Power Voltage Variation
A.3.3.1 AC power supply
Test method: Variation in AC mains power supply (single phase).
Object of the test: To verify compliance with the applicable
maximum permissible errors under conditions of varying AC mains
power supply.
Reference to standard: See Bibliography (3)
Test procedure in brief: The test consists of subjecting the EUT
to AC mains power during a weighing operation consisting of:
For belt scales--while totalizing the min at
the maximum flow rate.
For platform, hanging, and automatic hopper scales--at no load
and a test load between 50 percent and 100 percent of weighing
capacity.
Test severities: Mains voltage: upper limit U (nom) +10 percent;
lower limit U (nom) -15 percent.
Number of test cycles: At least one cycle.
Maximum allowable variations:
[[Page 32577]]
All functions must operate correctly.
All indications must be within maximum permissible errors
specified in sections 2, 3, or 4 of this handbook.
Conduct of the test:
Preconditioning: None required.
Test equipment: Variable power source, Calibrated voltmeter,
Load cell simulator, if applicable.
Condition of EUT:
Normal power supplied and ``on'' for a time period equal to or
greater than the warm-up time specified by the manufacturer.
Adjust the EUT as close to a zero indication as practicable
prior to the test.
Test sequence:
Stabilize the power supply at nominal voltage 2
percent.
Conduct the tests specified in the test procedure in brief and
record the following data:
date and time,
temperature,
relative humidity,
power supply voltage,
test load,
indications,
errors,
functions performance.
Reduce the power supply to -15 percent nominal.
Repeat the test and record the test data as indicated above.
Increase the power supply to +10 percent nominal.
Repeat the test and record the test data as indicated above.
Unload the EUT and decrease the power supply to nominal power
2 percent.
Repeat the test and record the test data as indicated above.
Note: In case of three phase power supply, the voltage variation
must apply for each phase successively. Frequency variation applies
for all phases simultaneously.
A.3.3.2 DC power supply
Under consideration.
A.3.4 Short Time Power Reduction
Test method: Short time interruptions and reductions in mains
voltage.
Object of the test: To verify compliance with the applicable
significant fault under conditions of short time mains voltage
interruptions and reductions.
Reference to standard: See Bibliography (4) IEC Publication
1000-4-11 (1994).
Test procedure in brief: The test consists of subjecting the EUT
to voltage interruptions from nominal voltage to zero voltage for a
period equal to 8-10 ms, and from nominal voltage to 50 percent of
nominal for a period equal to 16-20 ms. The mains voltage
interruptions and reductions must be repeated ten times with a time
interval of at least 10 seconds. This test is conducted during a
weighing operation consisting of:
For belt scales--while totalizing at the maximum flow rate at
least the min (or a time sufficient to complete
the test).
For platform, hanging, and automatic hopper scales--tested with
one small test load or simulated load.
Test severities: One hundred percent voltage interruption for a
period equal to 8-10 ms. Fifty percent voltage reduction for a
period equal to 16-20 ms.
Number of test cycles: Ten tests with a minimum of 10 seconds
between tests.
Maximum allowable variations: The difference between the weight
indication due to the disturbance and the indication without the
disturbance either must not exceed 1 d or the EUT must detect and
act upon a significant fault.
Conduct of the test:
Preconditioning: None required.
Test equipment:
A test generator suitable to reduce the amplitude of the AC
voltage from the mains. The test generator must be adjusted before
connecting the EUT.
Load cell simulator, if applicable.
Condition of EUT:
Normal power supplied and ``on'' for a time period equal to or
greater than the warm-up time specified by the manufacturer.
Adjust the EUT as close to zero indication as practicable prior
to the test.
Test sequence:
Stabilize all factors at nominal reference conditions.
Totalize as indicated above and record the following data:
date and time,
temperature,
relative humidity,
power supply voltage,
test load,
indications,
errors,
functions performance.
Interrupt the power supply to zero voltage for a period equal to
8-10 ms. During interruption observe the effect on the EUT and
record, as appropriate.
Repeat the above 4 additional times making sure that there is a
10 second interval between repetitions. Observe the effect on the
EUT.
Reduce the power supply to 50 percent of nominal voltage for a
period equal to 16-20 ms. During reduction observe the effect on the
EUT and record, as appropriate.
Repeat the above 4 additional times making sure that there is a
10 second interval between repetitions. Observe the effect on the
EUT.
A.3.5 Bursts
Test method: Electrical bursts.
Object of the test: To verify compliance with the provisions in
this manual under conditions where electrical bursts are
superimposed on the mains voltage.
Reference to standard: See Bibliography (5)
Test procedure in brief:
The test consists of subjecting the EUT to bursts of double
exponential wave-form transient voltages. Each spike must have a
rise in time of 5 ns and a half amplitude duration of 50 ns. The
burst length must be 15 ms, the burst period (repetition time
interval) must be 300 ms. This test is conducted during a weighing
operation consisting of:
For belt scales--while totalizing at the maximum flow rate at
least the min (or a time sufficient to complete
the test).
For platform, hanging, and automatic hopper scales--tested with
one small test load or simulated load.
Test severities: Amplitude (peak value) 1000 V.
Number of test cycles: At least 10 positive and 10 negative
randomly phased bursts must be applied at 1000 V.
Maximum allowable variations: The difference between the
indication due to the disturbance and the indication without the
disturbance either must not exceed the values given in section
T.5.5, or the EUT must detect and act upon a significant fault.
Conduct of the test: Refer to the IEC Publication referenced in
Bibliography (5) for detailed test procedures.
Supplementary information to the IEC test procedures:
Test equipment:
A burst generator having an output impedance of 50 ohms.
Test conditions:
The burst generator must be adjusted before connecting the EUT.
The bursts must be coupled to the EUT both on common mode and
differential mode interference.
Condition of EUT: Normal power supplied and ``on'' for a time
period equal to or greater than the warm-up time specified by the
manufacturer.
Adjust the EUT as close to a zero indication as practicable
prior to the test.
Test sequence:
Stabilize all factors at nominal reference conditions.
Conduct the test as indicated above and record the following
data:
date and time,
temperature,
relative humidity,
test load,
indication,
errors,
functions performance.
Subject the EUT to at least 10 positive and 10 negative randomly
phased bursts at the 1000 V mode. Observe the effect on the EUT and
record, as appropriate.
Stabilize all factors at nominal reference conditions.
Repeat the test and record the test data as indicated above.
A.3.6 Electrostatic Discharge
Test method: Electrostatic discharge (ESD).
Object of the test: To verify compliance with the provisions of
this manual under conditions of electrostatic discharges.
Reference to standard: See Bibliography (6)
Test procedure in brief:
A capacitor of 150 pF is charged by a suitable DC voltage
source. The capacitor is then discharged through the EUT by
connecting one terminal to ground (chassis) and the other via 150
ohm to surfaces which are normally accessible to the operator. This
test is conducted during a weighing operation consisting of:
For belt scales--while totalizing at the maximum flow rate at
least the min (or a time sufficient to complete
the test).
For platform, hanging, and automatic hopper scales--test with
one small test load or simulated load.
Test severities:
Air Discharge: up to and including 8 kV.
Contact Discharge: up to and including 6 kV.
[[Page 32578]]
Number of test cycles: At least 10 discharges must be applied at
intervals of at least 10 seconds between discharges.
Maximum allowable variations:
The difference between the indication due to the disturbance and
the indication without the disturbance either must not exceed the
values indicated in section T.5.5, or the EUT must detect and act
upon a significant fault.
Conduct of the test: Refer to the IEC Publication mentioned in
Bibliography (4) for detailed test procedures.
Supplementary information to the IEC test procedures
Preconditioning: None required.
Condition of EUT:
The EUT without a ground terminal must be placed on a grounded
plate which projects beyond the EUT by at least 0.1 m on all sides.
The ground connection to the capacitor must be as short as possible.
Normal power supplied and ``on'' for a time period equal to or
greater than the warm-up time specified by the manufacturer. Power
is to be ``on'' for the duration of the test.
The EUT must be operating under standard atmospheric conditions
for testing.
Adjust the EUT as close to a zero indication as practicable
prior to the test.
Test sequence:
Stabilize all factors at nominal reference conditions.
Conduct test as indicated above and record and the following
data:
date and time,
temperature,
relative humidity,
power supply voltage,
test load,
indication,
errors,
functions performance.
Approach the EUT with the discharge electrode until discharge
occurs and then remove it before the next discharge. Observe the
effect of the discharge on the EUT and record, as appropriate.
Repeat the above step at least 9 more times, making sure to wait
at least 10 seconds between successive discharges. Observe the
effect on the EUT and record as appropriate.
Stabilize all factors at nominal reference conditions.
Repeat the test and record the test data as indicated above.
A.3.7 Electromagnetic Susceptibility
Test method: Electromagnetic fields (radiated).
Object of the test:
To verify compliance with the provisions in this manual under
conditions of electromagnetic fields.
Reference to standard: See Bibliography (7)
Test procedure in brief:
The EUT is placed in an EMI chamber and tested under normal
atmospheric conditions. This test is first conducted at one load in
a static mode and the frequencies at which susceptibility is evident
are noted. Then tests are conducted at the problem frequencies, if
any, during a weighing operation consisting of:
For belt scales--while totalizing at the maximum flow rate at
least the (or a time
sufficient to complete the test). It is then exposed to
electromagnetic field strengths as specified in the ``Test
severities'' section below.
For platform, hanging, and automatic hopper scales--tested with
one small test load.
The field strength can be generated in various ways:
1. the strip line is used at low frequencies (below 30 MHz or in
some cases 150 MHz) for small EUT's;
2. the long wire is used at low frequencies (below 30 MHz) for
larger EUT's;
3. dipole antennas or antennas with circular polarization placed
1 m from the EUT are used at high frequencies.
Under exposure to electromagnetic fields the EUT is again tested
as indicated above.
Test severities: Frequency range: 26--1000 MHz
Field strength: 3 V/m
Modulation: 80 percent AM, 1 kHz sine wave
Number of test cycles: Conduct test by continuously scanning the
specified frequency range while maintaining the field strength.
Maximum allowable variations: The difference between the
indication due to the disturbance and the indication without the
disturbance either must not exceed the values given in this manual,
or the EUT must detect and act upon a significant fault.
Conduct of the test: Refer to the IEC Publication referenced in
Bibliography (7) for detailed information on test procedures.
Supplementary information to the IEC test procedures.
Test conditions:
The specified field strength must be established prior to the
actual testing (without the EUT in the field). At least 1 m of all
external cables must be included in the exposure by stretching them
horizontally from the EUT.
The field strength must be generated in two orthogonal
polarizations and the frequency range scanned slowly. If antennas
with circular polarization, i.e., log-spiral or helical antennas,
are used to generate the electromagnetic field, a change in the
position of the antennas is not required. When the test is carried
out in a shielded enclosure to comply with international laws
prohibiting interference to radio communications, care needs to be
taken to handle reflections from the walls. Anechoic shielding might
be necessary.
Condition of EUT: Normal power supplied and ``on'' for a time
period equal to or greater than the warm-up time specified by the
manufacturer. Power is to be ``on'' for the duration of the test.
The EUT must be operating under standard atmospheric conditions for
testing.
Adjust the EUT as close to a zero indication as practicable
prior to the test.
Test sequence: Stabilize all factors at nominal reference
conditions.
Conduct the test as indicated above and record the following
data:
date and time,
temperature,
relative humidity,
test load,
indication,
errors,
functions performance.
Following the IEC test procedures, expose the EUT at zero load
to the specified field strengths while slowly scanning the three
indicated frequency ranges.
Observe and record the effect on the EUT.
Repeat the test as indicated above and observe and record the
effect.
Stabilize all factors at nominal reference conditions.
Repeat the test and record the test data as indicated above.
Bibliography
Below are references to Publications of the International
Electrotechnical Commission (IEC), where mention is made in the
tests in Annex A.
1. IEC Publication 68-2-1 (1974): Basic environmental testing
procedures. Part 2: Tests, Test Ad: Cold, for heat dissipating
equipment under test (EUT), with gradual change of temperature.
IEC Publication 68-2-2 (1974): Basic environmental testing
procedures, Part 2: Tests, Test Bd: Dry heat, for heat dissipating
equipment under test (EUT) with gradual change of temperature.
IEC Publication 68-3-1 (1974): Background information, Section
1: Cold and dry heat tests.
2. IEC Publication 68-2-56 (1988): Environmental testing, Part
2: Tests, Test Cb: Damp heat, steady state. Primarily for equipment.
IEC Publication 68-2-28 (1980): Guidance for damp heat tests.
3. IEC Publication 1000-4-11 (1994): Electromagnetic
compatibility (EMC) Part 4: Testing and measurement techniques,
Section 11. Voltage dips, short interruptions and voltage variations
immunity tests. Section 5.2 (Test levels--Voltage variation).
Section 8.2.2 (Execution of the test-voltage variation).
4. IEC Publication 1000-4-11 (1994): Electromagnetic
compatibility (EMC) Part 4: Testing and measurement techniques,
Section 11. Voltage dips, short interruptions and voltage variations
immunity tests. Section 5.1 (Test levels--Voltage dips and short
interruptions. Section 8.2.1 (Execution of the test-voltage dips and
short interruptions) of the maximum transit speed and the range of
operating speeds.
5. IEC Publication 1000-4-4 (1995): Electromagnetic
compatibility (EMC) Part 4: Testing and measurement techniques--
Section 4: Electrical fast transient/burst immunity test. Basic EMC
publication.
6. IEC Publication 1000-4-2 (1995): Electromagnetic
compatibility (EMC) Part 4: Testing and measurement techniques--
Section 2: Electrostatic discharge immunity test. Basic EMC
Publication.
7. IEC Publication 1000-4-3 (1995): Electromagnetic
compatibility (EMC) Part 4: Testing and measurement techniques--
Section 3: Radiated, radio-frequency electromagnetic field immunity
test.
[FR Doc. 97-15659 Filed 6-13-97; 8:45 am]
BILLING CODE 3510-22-P