Some standard content:
National Metrology Verification Regulation of the People's Republic of China JJG 564—2002
Automatic Gravimetric Filling Instruments
(Quantitative Automatic Weighing Instruments)
Automatic Gravimetric Filling Instruments2002-11-04 Issued
2003-05-04 Implementation
The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China issued JJG $64-2002
Verification Regulation of
Automatic Gravimetric Filing InstrumentsJJG 564—2002
Replaces JJG564—1988
JJG 565-1988
JJG 731--1991
This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on November 4, 2002, and will be implemented from May 4, 2003.
Responsible unit: National Weighing Instrument Metrology Technical Committee Main drafting unit: Qingdao Weighing Instrument Testing Center China Institute of Metrology
Dalian Port Authority
Participating drafting units: Mettler-Todo Changzhou Weighing Instrument Co., Ltd. Shanghai Yamato Weighing Instrument Co., Ltd.
Harbin German Technology Development Co., Ltd. Henan Balance New Technology Co., Ltd.
[Haishitian Electronic Weighing Instrument Co., Ltd.
Qingdao Rubber Nan Computer Measuring Equipment Factory
This regulation is entrusted to the National Weighing Instrument Metrology Technical Committee to approve and interpret this regulation. The main drafters are:
Wang Junguo
Wu Zhengyuan
Qin Liaojun
Participating drafters:
He Guanglong
Wang Xiaolin
Chen Rixing
Han Jianjun
Xu Pingjun
Jiang Xuejun
Yu Qingjiang
JJG 564—2002
(Qingdao Weighing Instrument Testing Center)
(China Institute of Metrology
(Qingdao Weighing Instrument Testing Center)
(Dalian Port Authority)
(Mettler-Toledo Changzhou Weighing Instrument Co., Ltd.) (China Institute of Metrology)
(Shanghai Yamato Weighing Instrument Co., Ltd.)
(Harbin German Technology Development Co., Ltd.) (Henan Balance New Technology Co., Ltd.) Shanghai Ishida City Weighing Instrument Co., Ltd.
(Qingdao Jiaonan Computer Measuring Equipment Factory)
Terms (terms and definitions)
1 Scope
2 References
3 Terms and measurement units
3.1 Terms
3.2 Measurement units
5 Metrological performance requirements
Accuracy level
Allowable error limit
JJG 564—2002
Maximum allowable preset value error (maximum allowable setting error)Allowable error limit for each accuracy level
Net content requirements for quantitatively packaged goodsbZxz.net
Maximum allowable error of influence factor test
Influence factor
6 General technical requirements
Suitability for use
Operational safety·
Charging setting device·
Final cutting device
Feeding device·
Carrier
Zeroing and tare device
Balancing mechanism
Metrological safety
Explanatory mark
Verification mark
Control weighing instrument
7 Requirements for electronic weighing instruments
7.1 General requirements
Functional requirements
7.3 Inspection and test
8 Control of measuring instruments
Type evaluation (finalization)
Initial verification, subsequent verification and inspection during use8.2
JJG 564—2002
Appendix A Verification record and verification certificate inner page format Appendix B
Test procedure for type evaluation (finalization) Appendix C
Type evaluation (finalization) report format (25)
JJG 564--2002
(Terms and definitions)
The terms used in this regulation are consistent with the International Basic Vocabulary and General Terms of Metrology (1993 edition), the Legal Metrology Collection (1978 edition) and JJF1001-1998 General Metrology Terms and Definitions. In addition, this specification adopts the following definitions:
T. General definitionsT.1.1 Weighing instrumentA measuring instrument that uses the force of gravity acting on an object to determine the mass of the object. According to the mode of operation, weighing instruments are divided into automatic weighing instruments and non-automatic weighing instruments. T.1.2 Automatic weighing instrumentAutomatic weighing instrumentA weighing instrument that does not require operator intervention during the weighing process and can automatically weigh according to a predetermined processing procedure. T.1.3 Gravimetric automatic filling instrumentAulomatic gravimetric filling instrumentAn automatic weighing instrument that divides bulk materials into predetermined, substantially constant mass charges and loads the charges into containers. In addition to the common general-purpose filling scales, gravimetric automatic filling scales also include the following three types of filling scales. Tl3l Associative (selective combination) weigher includes multiple weighing units, and the loads weighed by multiple weighing units are combined and calculated, and the combination of loads is used as a gravity-type automatic loading weigher for the output of a single load. T.1.3.2 Cumulative weigher is a gravity-type automatic loading weigher with only one weighing unit, which controls the weight of the load output each time through multiple weighing cycles.
T.1.3.3 Subtractive weigher is a gravity-type automatic loading weigher that determines the weight of the load by controlling the material output of the weighing hopper. Tl4 Electromechanical loading weigher machinery & eleclronirn till weighing inslrument is a gravity-type automatic loading weigher with a weighing unit that uses a mechanical lever as the main force transmission device and is controlled by an electronic device.
T.1.5 Electronic weigher elcctronic: instrument is a weigher equipped with an electronic device. Electronic weighers are usually digital indicating weighers. T.1.6 Control instrument: An instrument used to determine the mass of the test load output by the filling instrument. T.1.7 Fill: One or more loads are placed in a container to form a predetermined mass. T.2 Structure: Note: In this specification, the term "load" refers to any part that performs one or more specific functions in a certain way. T.2.1 Principal parts T.2.1.1 Weighing unit: A device that provides information about the mass of the load being measured. The device consists of a non-dynamic whole or part. T.2.1.2 Load receplor: A part used to bear the load. T.2.1.3 Feeding device: A device that provides bulk material to the weighing unit. The device can have one or more working modes. T.2.1.4 Control devices T.2.1.4.1 Feed control device A device that adjusts the feed rate in a feed device. T.2.1.4.2 Fill setting device A device that allows a preset value to be set
T.2.1,4.3 Final cut-off device A device that controls the final feed cut-off to make the average value of the feed consistent with the preset value. The device may include a correction function for air drop.
T,2.1.4.4 Correction device A device that automatically corrects the setting value of the filling scale. T.2.2 Electronic parts T.2,2.1 Electronic device An electronic device is a device that is composed of electronic components and performs a specific function. An electronic device is usually made into a separate unit and can be tested separately.
Note: According to the above definition, an electronic device can be a complete weighing instrument (such as a weighing instrument for trade settlement) or a part of a weighing instrument (such as a display, printer, etc.).
T.2.2.2 Electronic sub-assembly A part of an electronic device that is composed of electronic components and has a clear function. T.2.2.3 Electron element The smallest physical entity that uses electron conduction or hole conduction in a semiconductor, gas or vacuum. T.2.3 Indicating device A set of components in a weighing instrument that displays the value of the weighing result in mass units. For charging scales, as long as the result of the indication is clear, the indicating device can indicate the mass of the load or the difference between the mass of the load and the preset value.
T.2.4 Auxiliary devices T.2.4.1 Zero-getting device A device that adjusts the indicating device to zero when there is no load on the load carrier. T.2.4.1.1 Non-automatic zero-setting device A device that adjusts the indicating device to zero by operation. T.2.4.1.2 Semi-automatic zero-setting device A device that automatically adjusts the indicating device to zero after giving an automatic instruction. T.2.4.1.3 Automatic zero-setting device A device that automatically adjusts the indicating device to zero without operation. 2
T.2.4.2 Tare dovice
JJG 564—2002
A device for adjusting the indication to the point when there is a load on the carrier: . The weighing range of the net weight is not changed (tare device is added): . The weighing range of the net weight is reduced (tare device is subtracted) T.3 Meterological characteristics T.3.1 Scale interval (d) The difference in mass units between the following: · The corresponding values of two adjacent scale lines in an analogue indication: . Two adjacent indications in a digital indication.
T.3.2 Reference particle mass of a product The mass of the reference particle is equal to the average value of the 10 largest elementary particles or flakes selected from one or more loads. T.3.3 Preset value presel value
The nominal value of a specified charge, a value in mass units preset by the operator with the aid of a charge setting device.
T.3.4 Static set point The value selected for the setting device indication in a static test or the value of the test base or mass used for the balanced load setting device. T.3.5 Weighing cycle
The operation includes:
·Feeding the load carrier;
·Weighing operation;
·Unloading of a single separate load.
T.3.6 Final feed time The time required to complete the final feed of material to the load carrier. T,3.? Minimum weighing (Min) minimum eapacity (Min) The minimum separate load that can be automatically weighed on the load carrier. T.3.8 Maximum weighing (Max) maximum eapacity (Maa) The maximum separate load that can be automatically weighed on the load carrier. T.3.9 Reduction ratio R reduction ratio R The reduction ratio R of the load transfer device is: R = FMIFL where: FM is the force acting on the load measuring device and FL is the force acting on the load carrier.
T.3.10 Warm-up time wam ~ up ime
The time required for the scale to meet the requirements after it is powered on. T.3.11 Average load per charge averagenurnberr loadperfil Half the sum of the maximum and minimum loads per charge that can be set by the operator; or the average value of the actual loads per charge during normal operation (if known) in the case where the load per charge is not directly determined by the operator; or the optimum load per charge specified by the manufacturer for a certain material to be weighed.
JJC 564 - 2002
T.3.12 Rated minimum fill: The minimum rated value of the charge. Below this rated value, the weighing result may produce an error exceeding the permissible error specified in this practice.
T.3.13 Minimum discharge minimum disc: Hargr: The minimum load permitted to be removed from a reduction scale. T.4 indications and errors T.4.1 Indications of indication T.4.1.1 Magnetic balance halarizing by weights The indication of the balance position determined by a fraction of the scale graduation value using a specified scale load (taking into account the reduction ratio of the load). T.4.1.2 Analogue indication The indication of the balance position determined by a fraction of the scale graduation value. T.4.1.3 Digital indication The indication in which the scale markings consist of numbers arranged in sequence and which cannot be subdivided by fractions of the graduation value. T.4.2 Errors
T.4.2.1 Error (of indication) The difference between the indication of a weighing instrument and the agreed true value of the mass. T.4.2.2 Intrinsic error The error of a weighing instrument determined under reference conditions. T.4.2.3 Initial inherent error The inherent error of a weighing instrument determined before performance tests and range stability tests. T.4.2.4 Fault The difference between the indication error and the inherent error of a weighing instrument. Note: Fault is mainly the result of changes in the residuals contained in electronic weighing instruments that are not the required amount. T.4.2.5 Significant error Significant error The maximum permissible deviation (specified in 5.2) of each load tested in use with a maximum load of the rated minimum load.
The following shall not be considered as significant errors even if they exceed the above specified values: Errors arising from independent causes within the instrument or its detection device: Errors that prevent any measurement from being made:
Transient errors in the indication or operation which cannot be interpreted, stored or transmitted as a measurement result and do not affect the final result of the automatic cycle; Errors so severe that they must be noticed by the person most concerned with the measurement. NOTE For instruments where more than one load may be loaded, the significant error value applicable to each static load test shall be calculated according to the corresponding test procedure.
T.4.2.6 Span stability The ability of an instrument to maintain the difference between the indication of the maximum capacity and the zero value within specified limits throughout the specified period of use.
T.4.2.7 Rounding error of digital indication4
JJG564—2002
The difference between the digital indication and the analogue indication assumed to be given by the instrument. T.4.3 Reference value for accuracy grade The accuracy grade of a weighing unit determined in type evaluation by static testing during the test period. The reference value for accuracy grade shall be equal to the highest accuracy grade of a filling instrument tested in use (in operation). T.5 Influence and reference conditions influence and reference conditions T.5.1 Influence quantity influence quantity is not a quantity being measured but influences the value being measured or the indication of the instrument. T.5.1.1 Influence factor An influence quantity whose value is within the specified operating conditions of the instrument. T.5.1.2 Disturbance
whose value is within the range specified in this regulation but exceeds the rated operating conditions specified for the instrument. T.5.2 Rated operating conditions Rated operating conditions The conditions of use that give the range of the measured quantity and the range of the series of influencing factors so that the metrological characteristics of the instrument are within the permissible error limits specified in this regulation.
T.5.3 Reference conditions Specified values of a group of influencing factors set to ensure that the measurement results can be effectively compared with each other; T.6 Tests
T.6.1 Material test
A test carried out on a complete loaded instrument using the same material as the expected weighing. T.6.2 Simulation test A test carried out on a complete loaded instrument or a part of an instrument simulating the weighing operation of any part. T.6.3 Performance test A test to verify whether the instrument under test (ELT) can achieve its specified function: T.6.4 Span stability test A test to verify whether the instrument under test (ELT) can maintain its performance characteristics unchanged after a period of use.
T.7 Control of measuring instrumentT.7.1 Patern evaluation is an inspection and test of the type of weighing instrument to determine whether the type of weighing instrument can be approved or whether a rejection document should be issued.
Note: In my country, the term "pattern evaluation" has been changed to "pattern evaluation".T.7.2 Verification is a procedure to find out and confirm whether the weighing instrument meets the statutory requirements, which includes inspection, marking and (or) issuing its verification certificate.
T.7.3 Initial verification is a verification of a weighing instrument that has not been verified.T.7.4 Subsequent verification is any verification after the initial verification of a weighing instrument.5
Subsequent verification includes:
a) mandatory periodic verification:
b) verification after repair;
JJG 564-2002
Calibration within the validity period of periodic calibration, regardless of whether it is requested by the user or the seal within the validity period has become invalid due to some reason. T.7.5 In-service inspection (inspection in use) is an inspection to check whether the calibration mark or calibration certificate of the instrument is valid, whether the protective mark is damaged, whether the instrument has been significantly modified after calibration, and whether its error exceeds the maximum allowable error in use. 1 Scope
JJG 564-2002
Verification Procedure for Gravimetric Automatic Loading Scales
(Quantitative Automatic Scales)
This procedure specifies the metrological performance requirements, general technical requirements, metrological instrument control, and verification methods and test procedures for gravimetric automatic loading scales (hereinafter referred to as "loading scales"). Applicable to type evaluation (finalization), initial verification, subsequent verification and in-use inspection as well as product quality supervision spot check inspection of charging scales. This procedure is to evaluate the metrological characteristics or technical characteristics of charging scales in a traceable manner and provide standardized requirements, test procedures and tables for them.
2 References
0IMfLR61 International Recommendation "Automatic Gravimetric Loading Instruments" 1996 (E) Edition (R61-1, R61-2)Automatie gravimetric filing instruments (R61) Part 1: Metrological and technical requirements-Tests (R61-1, Pari 2: Test report format (R61-2) 2) JJF1001-1998 "General metrological terms and definitions" JJF1015--2002 General specification for type evaluation and type approval of measuring instruments" JJF1016-2002 Guidelines for abbreviations of type evaluation of measuring instruments" International Electrotechnical Commission publications: IEC8 series International Electrotechnical Commission publications: IEC61000 series "Regulations on Metrological Supervision of Quantitatively Packaged Commodities", Order No. 43 of the State Administration of Technical Supervision on December 8, 1995. When using this procedure, attention should be paid to the current valid versions of the above-mentioned references. 3 Terms and measurement units
3. Terminology
The terms given above are considered to be part of this specification. 3.2 Units of measurement
The mass units used on charging scales are gram (), kilogram or gram (kg) and ton (t). 4 Summary
This specification applies to charging scales that divide bulk materials into predetermined, practically (relatively) constant mass charges or loads by automatic weighing. Usually these charges or loads are kept separate from each other. Charging scales are widely used in various industries for fixed pan weighing of bulk materials. Charging scales mainly include two or more weighing units and one or more automatic feeding devices associated with them, as well as corresponding control devices and discharge devices. 75 In-service inspection (inspection in use) is an inspection to check whether the verification mark or verification certificate of the weighing instrument is valid, whether the protective mark is damaged, whether the weighing instrument has been significantly modified after verification, and whether its error exceeds the maximum allowable error in use. 1 Scope
JJG 564-2002
Verification Procedure for Gravimetric Automatic Loading Scale
(Quantitative Automatic Scale)
This procedure specifies the metrological performance requirements, general technical requirements, control of measuring instruments, and verification methods and test procedures for gravity automatic loading scales (hereinafter referred to as "loading scales"). It is applicable to type evaluation (finalization identification), initial verification, subsequent verification and in-service inspection of loading scales, as well as product quality supervision spot checks. This procedure is to evaluate the metrological characteristics or technical characteristics of loading scales in a traceable manner, and provide standardized requirements, test procedures and tables for them.
2 References
0IMfLR61 International Recommendation "Automatic Gravimetric Loading Instruments" 1996 (E) Edition (R61-1, R61-2) Automatie gravimetric filing instruments (R61) Part 1: Metrological and technical requirements-Tests (R61-1, Pari 2: Test report format (R61- 2) JJF1001-1998 "General metrological terms and definitions" JJF1015--2002 General specification for type evaluation and type approval of measuring instruments" JJF1016-2002 Guidelines for abbreviations of type evaluation of measuring instruments" International Electrotechnical Commission publications: IEC8 series International Electrotechnical Commission publications: IEC61000 series "Regulations on Metrological Supervision of Quantitatively Packaged Commodities", Order No. 43 of the State Administration of Technical Supervision on December 8, 1995. When using this procedure, attention should be paid to the current valid versions of the above-mentioned references. 3 Terms and measurement units
3. Terminology
The terms given above are considered to be part of this specification. 3.2 Units of measurement
The mass units used on charging scales are gram (), kilogram or gram (kg) and ton (t). 4 Summary
This specification applies to charging scales that divide bulk materials into predetermined, practically (relatively) constant mass charges or loads by automatic weighing. Usually these charges or loads are kept separate from each other. Charging scales are widely used in various industries for fixed pan weighing of bulk materials. Charging scales mainly include two or more weighing units and one or more automatic feeding devices associated with them, as well as corresponding control devices and discharge devices. 75 In-service inspection (inspection in use) is an inspection to check whether the verification mark or verification certificate of the weighing instrument is valid, whether the protective mark is damaged, whether the weighing instrument has been significantly modified after verification, and whether its error exceeds the maximum allowable error in use. 1 Scope
JJG 564-2002
Verification Procedure for Gravimetric Automatic Loading Scale
(Quantitative Automatic Scale)
This procedure specifies the metrological performance requirements, general technical requirements, control of measuring instruments, and verification methods and test procedures for gravity automatic loading scales (hereinafter referred to as "loading scales"). It is applicable to type evaluation (finalization identification), initial verification, subsequent verification and in-service inspection of loading scales, as well as product quality supervision spot checks. This procedure is to evaluate the metrological characteristics or technical characteristics of loading scales in a traceable manner, and provide standardized requirements, test procedures and tables for them.
2 References
0IMfLR61 International Recommendation "Automatic Gravimetric Loading Instruments" 1996 (E) Edition (R61-1, R61-2) Automatie gravimetric filing instruments (R61) Part 1: Metrological and technical requirements-Tests (R61-1, Pari 2: Test report format (R61- 2) JJF1001-1998 "General metrological terms and definitions" JJF1015--2002 General specification for type evaluation and type approval of measuring instruments" JJF1016-2002 Guidelines for abbreviations of type evaluation of measuring instruments" International Electrotechnical Commission publications: IEC8 series International Electrotechnical Commission publications: IEC61000 series "Regulations on Metrological Supervision of Quantitatively Packaged Commodities", Order No. 43 of the State Administration of Technical Supervision on December 8, 1995. When using this procedure, attention should be paid to the current valid versions of the above-mentioned references. 3 Terms and measurement units
3. Terminology
The terms given above are considered to be part of this specification. 3.2 Units of measurement
The mass units used on charging scales are gram (), kilogram or gram (kg) and ton (t). 4 Summary
This specification applies to charging scales that divide bulk materials into predetermined, practically (relatively) constant mass charges or loads by automatic weighing. Usually these charges or loads are kept separate from each other. Charging scales are widely used in various industries for fixed pan weighing of bulk materials. Charging scales mainly include two or more weighing units and one or more automatic feeding devices associated with them, as well as corresponding control devices and discharge devices. 7
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