This standard specifies the requirements, test methods, measurement control, and marking, packaging, transportation, and storage of non-continuous cumulative automatic weighing instruments (cumulative hopper weighing instruments) (hereinafter referred to as weighing instruments). This standard applies to weighing instruments with hopper-type load carriers that divide a batch of bulk materials into discrete loads, weigh the mass of each discrete load in turn, accumulate the weighing results, and discharge the discrete loads. QB/T 1078-2004 Non-continuous cumulative automatic weighing instruments (cumulative hopper weighing instruments) QB/T1078-2004 Standard download decompression password: www.bzxz.net

ICS 17.100
Classification number: N13
Registration number: 15123-2005
Light Industry Standard of the People's Republic of China
QB/T 1078-2004
Replaces QB/T 1078-1991
Discontinuous totalizing automatic weighing instruments(totalizing hopper scale)
weighers) (OIMLR107:1997MOD))
2004-12-14 Issued
2005-06~01 Implementation by the National Development and Reform Commission of the People's Republic of China
2 Normative references ...
3 Terms
4 Classification
4.1 Model
4.2 Specification
5 Requirements ·
5.1 Metrological requirements
5.2 Technical requirements ·
5.3 Requirements for electronic weighing instruments
6 Test methods
6.1 Standard instruments
Separate verification method
6.3 Integrated verification method
7 Metrological control
Type evaluation
First verification
Subsequent verification
In-use inspection
8 Marking, packaging, transportation, storage
8.3 Transportation
8.4 Storage
Appendix A (Normative Appendix) Test procedures for non-continuous cumulative automatic weighing instruments A.1 Documentation (7.1.1)
A.2 Comparison of structure and documentation (7.1.1)A.3 Preliminary review
A.3.1 Technical requirements (5.2)
A.3.2 Instruction mark (8.1.1)
A.3.3 Seals and verification marks (8.1.2, 8.1.3)A.4 Overview.
A.4.1 General requirements for electronic instruments under test (EUT)A.4.2 Control instruments and test standards (6.1)A.5 Test procedure
A.5.1 Type evaluation (7.1)
A.5.2 Initial verification (7.2)
QB/T 1078-2004
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QB/T 1078—2004
A.6 Metrological performance test
A.6.1 Zero setting device (5.2.2.6)
A.6.2 Material test (7.1.3.1, 7.2.1.2)A.7 Additional performance
A.7.1 Warm-up time test (5.3.3.5)A.7.2 Consistency of indication and printing device (5.1.6)A.7.3 Automatic mode should be interlocked (5.2.2.4)A.7.4 Printing interlock (5.2.4)
A.7.5 Battery power supply interlock (5.3.3.8)A.7.6 Retention of total after power failure (5.3.3.7)A.7.7 Zero offset interlock (5.2.2.6)A.8 Influence factor and interference test (5.1.7, 5.3.2)A.8. 1
A.8.2 Requirements for simulation devices
Influence factor test
Static temperature test
Wet heat, steady state
Grid supply voltage change (AC)
Battery supply voltage change (DC)
A.8.4 Interference test
Voltage sag and short interruption
Electrical fast transient pulse group immunity
Electrostatic discharge
Electromagnetic susceptibility
A.9 Range stability test (5.3.4.3)
Appendix B (Normative Appendix) Checklist and test report for non-continuous cumulative automatic weighing instruments 14
This standard is a revision of QB/T1078-1991 "Electronic hopper scale". QB/T1078—2004
This standard is modified to adopt the International Recommendation No. 107 of the International Organization of Legal Metrology (OIMLR107-1997) "Non-continuous cumulative automatic weighing instrument (cumulative hopper scale)".
Compared with QB/T1078-1991, the main changes in this standard are as follows: the standard is modified to adopt the International Recommendation No. 107 of the International Organization of Legal Metrology (OIMLR1071997); the name of the standard is changed to "Non-continuous cumulative automatic weighing instrument (cumulative hopper scale)" according to the international recommendation, so that its content is consistent with the name; - Based on the content of the international recommendation, the standard provides a more specific and detailed description of the technical requirements and test methods. Compared with 0IMLR107--1997, the main changes in this standard are: the requirements for packaging, transportation and storage have been added; the calculation formulas for the material test errors of the separation verification method and the integrated verification method have been added; the pulse peak value of the power input and output ports of the electrical fast transient pulse group immunity test has been changed from 0.5kV to 1kV; the radio frequency electromagnetic field of the electromagnetic susceptibility test has been changed from 26MHz~1000MHz to 80MHz~1000MHz. Appendix A and Appendix B of this standard are normative appendices. This standard is proposed by the China Light Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Weighing Instruments. This standard was drafted by Jinan Jinzhong Electronic Weighing Instrument Co., Ltd., and Mettler-Toledo (Changzhou) Weighing Equipment System Co., Ltd., Bluestar Shenyang Light Industry Machinery Design Institute, and Qingdao University Soft Control Co., Ltd. participated in the drafting. The main drafters of this standard are Zhang Zhaoxia, Wang Yadong, Yin Jiangang, and Hang Bolin. This standard was first issued in March 1991, and this is the first revision. This standard shall replace the light industry standard QB/T1078-1991 "Electronic hopper scale" issued by the former Ministry of Light Industry from the date of implementation. 1 Scope
Discontinuous cumulative automatic weighing instrument (cumulative hopper scale) QB/T1078-2004
This standard specifies the requirements, test methods, measurement control, and marking, packaging, transportation, and storage of discontinuous cumulative automatic weighing instruments (cumulative hopper scales) (hereinafter referred to as weighing instruments).
This standard applies to weighing instruments with hopper-type load carriers that divide a batch of bulk materials into discontinuous loads, weigh the mass of each discontinuous load in turn, accumulate the weighing results, and discharge the discontinuous loads. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any un-dated referenced documents, the latest version shall apply to this standard. GB/T191 Packaging, storage and transportation pictorial marking
GB/T2423.1-2001 Environmental testing for electric and electronic products Part 2: Test methods Test A: Low temperature (idt IEC 60068-2-1: 1990)
GB/T 2423.2-2001
Environmental testing for electric and electronic products Part 2: Test methods Test B: High temperature (idt IEC 60068-2-2: 1974)
Environmental testing for electric and electronic products Part 2: Test methods Test Cb: Steady damp heat for equipment GB/T 2423.9-2001
(eqv IEC 60068-2-56: 1988)
GB/T2424.2-1993 Basic environmental testing procedures for electric and electronic products Guidelines for damp heat testing (eqv IEC 60068-2-28: 1990)
GB/T7551--1997 Weighing sensor
GB/T7724--1999 Weighing display controller GB/T14250 Weighing instrument terminology
GB/T17626.2-1998 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test (idt IEC 61000-4-2: 1995)
GB/T 17626.3-1998
Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic field radiation immunity test (idt IEC 61000-4-3:1995)
GB/T 17626.4-1998E
Electromagnetic compatibility test and measurement technology
(idt IEC 61000-4-4: 1995)
GB/T 17626. 11 1999
Electromagnetic compatibility test and measurement technology
(idt IEC 61000-4-11:1995)
QB/T1563 Method for compiling weighing instrument product modelsOIML R76-1 Non-automatic weighing instruments
3 Terminology
Electrical fast transient and burst immunity test
Voltage sag, short interruption and voltage variation immunity test The terms established in GB/T14250 apply to this standard, and the following explanations of terms apply only to this standard. 3.1
Discontinuous totalizing automatic weighing instruments An automatic weighing instrument that divides a batch of bulk materials into discrete loads, weighs the mass of each discrete load in turn, accumulates the weighing results, and discharges the discrete loads1
QB/T1078-2004
.
Control weighing instrumentcontrol instrument
A non-automatic weighing instrument used to determine the mass of the material used as the test load in material testing. 3.3
Totalization indicating device A device indicating the total amount of discontinuous loads weighed and discharged. 3.4
Principal totalization indicating device A device indicating the total amount of all discontinuous loads weighed and discharged. 3.5
Partial totalization indicating device A device indicating the total amount of a limited number of discontinuous loads weighed and discharged. 3.6
Supplementary totalization indicating device A device with a scale value greater than that of the principal totalization indicating device and indicating the total amount of loads weighed successively over a considerable period of time. 3.7
Control indicating device A device used for control purposes and capable of being used as a control instrument to weigh discontinuous loads. 3.8
Totafization scale interval Totalization scale interval
Scale interval of the principal totalization indicating device.
Control scale interval
Control scale interval
Control scale interval of indicating device.
Weighing cycle
Weighing operation completes one operation process according to the following procedure: send the load to the load carrier (or in it); perform a single weighing operation;
. Unload a discontinuous load.
Maximum weighing capacity
maximum capacity
The maximum discontinuous load that can be weighed automatically. 3.12
minimum capacity
Minimum weighing capacity
The minimum discontinuous load that can be weighed automatically. 3.13
automatic weighing range
Automatic weighing range
The range from minimum weighing to maximum weighing. 2
Target loadtarget load
A preset load value on the load carrier that causes the feeding to be stopped in each weighing cycle. 3.15
minimum totalized loadminimum totalized loadQB/T 1078—2004
In the automatic weighing range, when the automatic weighing is performed each time without continuous load, the minimum load value that can be accumulated without exceeding the maximum allowable error3.16
rated flowrate
rated flowrate
The maximum cumulative amount of load weighed per hour specified. 3.17
fault
The difference between the indicated error and its inherent error. Note 1: In principle, fault is caused by the undesirable changes in the storage or data when it passes through the electronic weighing instrument. Note 2: It can be seen from the above definition that "fault" in this standard is a digital quantity. 3.18
significant fault
a fault greater than 1d.:
significant faults are not considered to be caused by simultaneous and independent causes in the instrument itself and in the calibration facility; faults for which it is impossible to make a measurement;
a short-term fault in an indication which cannot be interpreted, stored or transmitted as a metrological result; a fault so severe that it must cause one to notice the change in measurement. 3.19
material test
a weighing test on a complete instrument using typical materials to be weighed. 3.20
simulation test
a test simulating a part of a weighing operation on a complete instrument or on a component of an instrument. 3.21
performance test
a test to verify the ability of the equipment under test (EUT) to perform its intended functions. 3.22
Span stability test A test to check the ability of the equipment under test (EUT) to maintain its performance characteristics after a period of use. 4 Classification
4.1 Model
Compiled in accordance with QB/T1563.
4.2 Specification
The specifications of the scale are expressed in terms of rated flow, in cubic meters per hour (m/h) or tons per hour (t/h). 3
QB/T 1078-2004
5 Requirements
5.1 Metrological requirements
5.1.1 Accuracy grades
Weighing instruments are divided into four accuracy grades:
0.2, 0.5, 1, 2
5.1.2 Maximum permissible error
5.1.2.1 Automatic weighing
The maximum permissible error of each accuracy grade shall be the corresponding value in Table 1, and its value shall be rounded to the nearest cumulative scale value. Table 1
Accuracy grades
5.1.2.2 Influence quantities
First verification
Mass percentage of cumulative load
In-use inspection
In the test for evaluating the effect of influencing factors, the maximum permissible error shall comply with the provisions of Table 2. Table 2
Maximum allowable error
Load expressed by cumulative graduation value
0≤m≤500
5008
Totalization scale intervalTotal division value
Division value of the main totalizing indicating device.
Control division value
Control scale interval
Division value of the control indicating device.
Weighing cycleweighingcycle
Weighing operation completes an operation process according to the following procedures: send the load to the load carrier (or in it); perform a single weighing operation;
. Unload a discontinuous load.
Maximum weighing capacity
maximum capacity
The maximum discontinuous load that can be weighed automatically. 3.12
minimum capacity
Minimum weighing capacity
The minimum discontinuous load that can be weighed automatically. 3.13
automatic weighing range
Automatic weighing range
The range from the minimum weighing to the maximum weighing. 2
Target loadtarget load
A preset load value on the load carrier that causes the feeding to be stopped in each weighing cycle. 3.15
minimum totalized loadminimum totalized loadQB/T 1078—2004
In the automatic weighing range, when the automatic weighing is performed each time without continuous load, the minimum load value that can be accumulated without exceeding the maximum allowable error3.16
rated flowrate
rated flowrate
The maximum cumulative amount of load weighed per hour specified. 3.17
fault
The difference between the indicated error and its inherent error. Note 1: In principle, fault is caused by the undesirable changes in the storage or data when it passes through the electronic weighing instrument. Note 2: It can be seen from the above definition that "fault" in this standard is a digital quantity. 3.18
significant fault
a fault greater than 1d.:
significant faults are not considered to be caused by simultaneous and independent causes in the instrument itself and in the calibration facility; faults for which it is impossible to make a measurement;
a short-term fault in an indication which cannot be interpreted, stored or transmitted as a metrological result; a fault so severe that it must cause one to notice the change in measurement. 3.19wwW.bzxz.Net
material test
a weighing test on a complete instrument using typical materials to be weighed. 3.20
simulation test
a test simulating a part of a weighing operation on a complete instrument or on a component of an instrument. 3.21
performance test
a test to verify the ability of the equipment under test (EUT) to perform its intended functions. 3.22
Span stability test A test to check the ability of the equipment under test (EUT) to maintain its performance characteristics after a period of use. 4 Classification
4.1 Model
Compiled in accordance with QB/T1563.
4.2 Specification
The specifications of the scale are expressed in terms of rated flow, in cubic meters per hour (m/h) or tons per hour (t/h). 3
QB/T 1078-2004
5 Requirements
5.1 Metrological requirements
5.1.1 Accuracy grades
Weighing instruments are divided into four accuracy grades:
0.2, 0.5, 1, 2
5.1.2 Maximum permissible error
5.1.2.1 Automatic weighing
The maximum permissible error of each accuracy grade shall be the corresponding value in Table 1, and its value shall be rounded to the nearest cumulative scale value. Table 1
Accuracy grades
5.1.2.2 Influence quantities
First verification
Mass percentage of cumulative load
In-use inspection
In the test for evaluating the effect of influencing factors, the maximum permissible error shall comply with the provisions of Table 2. Table 2
Maximum allowable error
Load expressed by cumulative graduation value
0≤m≤500
5008
Totalization scale intervalTotal division value
Division value of the main totalizing indicating device.
Control division value
Control scale interval
Division value of the control indicating device.
Weighing cycleweighingcycle
Weighing operation completes an operation process according to the following procedures: send the load to the load carrier (or in it); perform a single weighing operation;
. Unload a discontinuous load.
Maximum weighing capacity
maximum capacity
The maximum discontinuous load that can be weighed automatically. 3.12
minimum capacity
Minimum weighing capacity
The minimum discontinuous load that can be weighed automatically. 3.13
automatic weighing range
Automatic weighing range
The range from the minimum weighing to the maximum weighing. 2
Target loadtarget load
A preset load value on the load carrier that causes the feeding to be stopped in each weighing cycle. 3.15
minimum totalized loadminimum totalized loadQB/T 1078—2004
In the automatic weighing range, when the automatic weighing is performed each time without continuous load, the minimum load value that can be accumulated without exceeding the maximum allowable error3.16
rated flowrate
rated flowrate
The maximum cumulative amount of load weighed per hour specified. 3.17
fault
The difference between the indicated error and its inherent error. Note 1: In principle, fault is caused by the undesirable changes in the storage or data when it passes through the electronic weighing instrument. Note 2: It can be seen from the above definition that "fault" in this standard is a digital quantity. 3.18
significant fault
a fault greater than 1d.:
significant faults are not considered to be caused by simultaneous and independent causes in the instrument itself and in the calibration facility; faults for which it is impossible to make a measurement;
a short-term fault in an indication which cannot be interpreted, stored or transmitted as a metrological result; a fault so severe that it must cause one to notice the change in measurement. 3.19
material test
a weighing test on a complete instrument using typical materials to be weighed. 3.20
simulation test
a test simulating a part of a weighing operation on a complete instrument or on a component of an instrument. 3.21
performance test
a test to verify the ability of the equipment under test (EUT) to perform its intended functions. 3.22
Span stability test A test to check the ability of the equipment under test (EUT) to maintain its performance characteristics after a period of use. 4 Classification
4.1 Model
Compiled in accordance with QB/T1563.
4.2 Specification
The specifications of the scale are expressed in terms of rated flow, in cubic meters per hour (m/h) or tons per hour (t/h). 3
QB/T 1078-2004
5 Requirements
5.1 Metrological requirements
5.1.1 Accuracy grades
Weighing instruments are divided into four accuracy grades:
0.2, 0.5, 1, 2
5.1.2 Maximum permissible error
5.1.2.1 Automatic weighing
The maximum permissible error of each accuracy grade shall be the corresponding value in Table 1, and its value shall be rounded to the nearest cumulative scale value. Table 1
Accuracy grades
5.1.2.2 Influence quantities
First verification
Mass percentage of cumulative load
In-use inspection
In the test for evaluating the effect of influencing factors, the maximum permissible error shall comply with the provisions of Table 2. Table 2
Maximum allowable error
Load expressed by cumulative graduation value
0≤m≤500
5002 Influence quantity
First verification
Mass percentage of cumulative load
In-service inspection
In the test for evaluating the effect of influencing factors, the maximum allowable error shall comply with the provisions of Table 2. Table 2
Maximum allowable error
Load expressed by cumulative graduation value
0≤m≤500
5002 Influence quantity
First verification
Mass percentage of cumulative load
In-service inspection
In the test for evaluating the effect of influencing factors, the maximum allowable error shall comply with the provisions of Table 2. Table 2
Maximum allowable error
Load expressed by cumulative graduation value
0≤m≤500
500
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