Some standard content:
National Metrology Verification System Table of the People's Republic of China JJG2066--2006
Measuring Instruments for Large Force
Measuring Instruments for Large Force2006-12-08 Issued
Implementation on 2007-06-08
The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China issued JJG2066-2006
Verification Scheme of Measuring Instruments for Large Force
ikoNiika
JJG2066—2006
Replaces JJG2066-1990
This verification system table was approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on December 8, 2006, and came into effect on June 8, 2007.
Responsible unit: National Technical Committee on Force and Hardness Metrology Drafting unit: Shanghai Institute of Metrology and Testing Technology, China National Institute of Metrology
This verification system table is interpreted by the National Technical Committee on Force and Hardness Metrology Main drafters:
Zhang Zhimin
Zhang Guiren
Participating drafters:
Ma Baolin
JJG2066—2006
Taibao Mei Instrument Measurement Ten Straight Dada
(China Institute of Metrology)
(China Institute of Metrology)
odtnsno
(Shanghai Institute of Metrology and Testing Technology) Hangkang
(China Institute of Metrology)| |tt||(China Institute of Metrology)
Chun Guoquan Liguo Bao
Zhou Jinglin Guodan Tangpin
2 Metrology benchmark·
3 Metrology standard···
4 Working metrological instruments.
5 Block diagram of verification system for large-capacity metrological instruments
Appendix A System E, calculation of
JJG2066—2006
ikoNiKa
(3)
1 Scope
JJG2066-—2006
Verification system table for large-capacity metrological instruments
This verification system table is applicable to the verification of force metrological instruments with an upper limit of the measuring range greater than 1MN~60MN. It specifies the procedures and methods for transferring from the national benchmark for large-capacity forces to working metrological instruments through metrological standards, and specifies the corresponding uncertainty. This system provides guidance to ensure that large-capacity measuring instruments meet the corresponding technical indicators and confirm their traceability.
2 Metrology standards
2.1 The national standard for large-capacity is the highest basis for reproducing and unifying the national large-capacity values (>1MN). 2.2 The national standard for large-capacity values consists of two large-capacity reference machines, one is a 5MN hydraulic force reference machine and the other is a 20MN hydraulic force reference machine.
2.3 The measurement range of the 5MN force reference machine is 0.1MN~5MN (compressive force) and 0.1MN2MN (tensile force), and the expanded uncertainty is 3×10-4 (k=3). 2.4 The measurement range of the 20MN force reference machine is 0.5MN~20MN (compressive force) and 0.5MN~10MN (tensile force), and the expanded uncertainty is 1×10-4 (k=3). 2.5 The hydraulic force reference machine is based on the Pascal principle. It amplifies the gravity of the magnetic code through a cylinder plug system without mechanical friction. The reproduced force value is calculated by the following formula: S
Wherein: F is the reproduced force value, N;
The mass of the code, kg;
g——The gravity acceleration at the installation location of the force reference machine, m/s; St——The effective area of the working plug, m; S,——The effective area of the force measuring cylinder plug, m; p.——Air density, kg/m;
ew——The density of the code material, kg/m.
2.6 In order to ensure accurate and consistent force transmission, the force level within the measurement range of the large force reference machine that is not greater than 1MN should be regularly compared with the static weight dynamometer as the national force reference: the force level greater than 1MN should be compared with the same domestic and foreign *Note: The uncertainty mentioned in this system table refers to relative uncertainty. I
JJG2066—2006
TI KAON KAca-
type force reference machines are compared. The comparison uses a high-accuracy standard dynamometer as the transfer standard. The comparison result is evaluated by the coefficient E,. If the absolute value of E, is less than 1, the consistency of the two force reference machines is within the allowable range of its uncertainty. The calculation of E, is shown in Appendix A.
3 Metrology standards
3.1 Large force value metrology standards are divided into two categories. The first category is the metrology standard that generates force values, called large force value standard machines. The second category is the metrology standard that transfers force values, called large force value dynamometer ENHN
3.2 Large force value standard machine
3.2.1 Large force value standard machine is a qualified dynamometer with an upper limit of the measurement range of MN. At present, there are two types of large force standard machines: hydraulic type and superposition type. 3.2.2 The best measurement range of hydraulic force standard is 0.05 level and voS level, and the corresponding measurement range is 3.2.3 The measurement range of superposition type standard machine is 30M and 0.1MNMN, and the accuracy is 4(k=2)x10-3(k=2). The best accuracy level is 005 level and 0.1 level, and the corresponding extension is 5×10-4(k=2).
（=2）
type of force generated
expanded uncertainty
3.2.4 For 1
(the upper limit of the measuring range is greater than 1MN), the device is better than 1×10-
3.3 Large force value
3.3.1 When the large force value
is greater than 1MN
2), it can also be used as a
dynamometer
dynamometer refers to a device composed of a large
vertical reference machine or The qualified standard machines are resistance strain type, dial indicator type, etc. According to their structural principles, they can be divided into 3.3.2 Large force value 1 dynamometer according to its allowable two items: repeatability R and long-term stability S. Repeatability refers to the degree to which the output residual value of the dynamometer remains unchanged within a certain period of time when the same load is repeatedly applied to the dynamometer. The upper limit of the measurement range is large
grade, and the main technical indicators related to it are loading conditions and the same environmental conditions. The long-term stability reflects the measurement under the same conditions. 3.3.3 The standard dynamometer with large force values used for transmission between force standard machine and force standard machine has an upper limit of measurement range of A0MEWO16 grade, the corresponding repeatability is 3×10- and 5MN (20MN), the accuracy is equal to
5×10-4, and the long-term stability is ±3×10-4 and ±5×103.3.4 The standard dynamometer with large force values used for transmission between force standard machine and material testing machine, special testing machine, special force source has an upper limit of measurement range of 30MN, and the accuracy grades are divided into 0.1, 0.3 and 0.5 grades. The corresponding repeatability is 1×10-33×10-3 and 5×10-3, and the long-term stability is ±1×10-3±3×10 and ±5×10-3.
3.4 Method of transferring force value
3.4.1 When the standard dynamometer is used to transfer between the force reference machine and the force standard machine, it must first be calibrated on the force reference machine in accordance with 2
JJG2066-2006
, and the calibration method of 0.03 and 0.05 grade strain gauge dynamometers in the "Standard Dynamometer Calibration Procedure" shall be adopted. The standard dynamometer that has passed the calibration can be used to calibrate (or compare) the hydraulic force standard machine and the superposition force standard machine, and the method adopted shall comply with the "Force Standard Machine Calibration Procedure". 3.4.2 When the standard dynamometer is used to transfer between the force (base) standard machine and the testing machine or force source, it must first be calibrated on the force (base) standard machine, and the calibration method of 0.1, 0.3 and 0.5 grade dynamometers in the "Standard Dynamometer Calibration Procedure" shall be adopted. The standard dynamometer that has passed the verification is used to verify the material testing machine, special testing machine, and special force source. The method used shall comply with the corresponding verification procedures for the testing machine. 3.4.3 If the measurement limit of the force standard machine or testing machine is large and it is not possible to use a single standard dynamometer for verification, one (or more) standard dynamometers of the same model and quantity may be used for parallel verification. OO
4 Working measuring instruments
Needle measuring instruments are divided into two types
4.1. The large force value tools include material testing machines, large component testing machines, special force measuring machines, and working force measuring machines. 4.2 Large-capacity testing machines (simple testing machines) and special force testing machines and force sources 4.2.1 Material testing machines, special testing machines and special force sources must be tested according to the corresponding verification procedures or with reference to relevant laws and regulations using standard measuring instruments, and the force measurement range of material testing machines (including large component testing machines) with an accuracy grade of 30MN is limited, and the accuracy grades are divided into grade 1, grade 1 and grade 2. The upper limit of the force measurement range of testing machines (including misaligned chain testing machines) is 30MN, and the upper limit of the force measurement range of special force sources is 50MN. 4.3 Large-capacity hydraulic dynamometers 4.3.1 Special dynamometers refer to dynamometers with higher force requirements.
Direct reference machine or machine
Its accuracy grade is divided into
Expanded uncertainty is excellent/3×10-3 (=2). For engineering measurement and accuracy, the upper limit of the measurement range of the special dynamometer is 60MN~1×10-2, and the long-term stability quality is ±(1×10-3～1×10-2)
The repeatability is 1×10-3~
4.3.2 Working dynamometer refers to the force measurement range with an upper limit greater than 1MN~50 MN, a range of 1×10-2, 3×10-2 and 5×102, and the long-term accuracy grades are divided into 1, 3 and 5 grades. The long-term stability is ±1×10-2±3×10-2 and ±5×10-2. The working dynamometer should be tested according to JJG455-2000 "Working dynamometer calibration regulations" and its accuracy level should be determined. 4.3.3 The dynamometer used for engineering measurement can be divided into dial indicator type, resistance strain type, piezomagnetic type and film cylinder type according to its structural principle.
5 Block diagram of the calibration system of large-capacity measuring instruments (see the figure below) Meter
National standard for force value
（EIMN)
Massive force meter
JJG2066-—2006
National standard for large-capacity value
0.1MN-5MN
0.5MN-20MN
Standard dynamometer
1MN-5MN（20MN )
±3×10
Verification or comparison
Hydraulic force standard machine
IMN-5MN
≤5X10
≤X10
Special force source
F.1MN~50MN
3×103
Special dynamometer
IMN~60MN
1X10-1X10||tt| |S,±（1×10--1×10)
Standard dynamometer
IMN-30MN
±3×10
Measurement and calculation
Superimposed force standard machine
IMN~30MN
≤5X10
≤IX10
±5X10
Material testing machine
IMN-30MN||tt ||Working force instrument
IMN-50MN
±1x10
±3×10
±5X10
-iiKAoNiKAca
Gravity acceleration
Special testing machine
IMN-30MN
Note: Working measuring instruments may have new products or different names, and it is impossible to list all of them in the verification system table. For working measuring instruments not included in the verification system table, if necessary, according to their measurement, measurement range and working principle, refer to the measurement diagram and working principle of the working measuring instruments listed in the corresponding verification system table, and determine the appropriate value transmission method. Symbols: F—Force measurement model
Force measurement modelUpper limit
S—Long-term stability
R—Repeatability
U—Expanded uncertainty (measurement standard large-3, measurement standard or working measurement instrument k-2)
CL—Accuracy level
Appendix A
JJG2066—2006
System E, calculation
When comparing between force reference machines, the ABA method is usually adopted. Taking the comparison of two force reference machines A and B as an example, the test is first carried out on the force reference machine A, then on B, and finally on A. The test adopts the same procedure (the test procedure can refer to the relevant international comparison procedure for force values). When testing on force reference machine A or B, the standard uncertainty of the measurement result is calculated according to the following formula: Vum+up+upo+ue+uin+un
, where u is the standard uncertainty of the corresponding force reference machine, ur is the standard uncertainty caused by repeatability, urepre is the standard uncertainty caused by rotation effect, ur is the standard uncertainty caused by the resolution of the indicating instrument, uim is the standard uncertainty caused by the different loading time of force reference machines A and B, and uram is the standard uncertainty caused by the temperature difference between the laboratories where A and B are located. In the comparison test, the standard uncertainty caused by the drift of the output signal of the force sensor is:
u arit
, where and are the test data of the force reference machine A twice before and after, and is the average value of the two data.
The expanded uncertainty U of the measurement result on force reference machine A is calculated by the following formula, in which the factor is equal to 2. UA=2X
uep+up
, where uepre and uapo are the standard uncertainties of the measurement results of the force reference machine A twice before and after. The expanded uncertainty U of the measurement result on the force reference machine B is calculated by the following formula, in which the factor is equal to 2UeB=2Xu
where u is the standard uncertainty of the measurement result when testing on the force reference machine B. The relative deviation of the measurement results between the force reference machines A and B is ma
where: 2 is the test data on the force reference machine B. The coefficient E is calculated according to the following formula:
People's Republic of China
National Metrology Verification System Table
Great Force Measuring Instruments
JJG2066--2006
Published by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and published by China Metrology Press
No. 2, West Hepingli Street, Beijing
Postal Code 100013
Tel. (010) 64275360
http://zgjl.com.cn|| tt||Printed by Beijing Dixin Printing Factory
Published by Beijing Xinhua Bookstore
All rights reserved. No reproduction allowed
880mm×1230mm16-size
First edition in February 2007
Printing sheet 0.75 Word count 7,000 words
First printing in February 2007
Print count 1-1000
Standard book number 155026-2208
Price: 16.00 yuan
-KAONi KAca-2 Working dynamometer refers to a device with a measuring force range of LO greater than 1MN~50MN, a range of 1×10-2, 3×10-2 and 5×102, and a long-term accuracy level of 1, 3 and 5. The stability is ±1×10-2±3×10-2 and ±5×10-2. Working dynamometers should be tested in accordance with JJG455-2000 "Working dynamometer verification regulations" and their accuracy levels should be determined. 4.3.3 Dynamometers used for engineering measurement can be divided into dial indicator type, resistance strain type, piezomagnetic type and film cylinder type according to their structural principles.
5 Large force measuring instrument calibration system diagram (see the figure below) meter
Force value national standard
（EIMN)
Big force meter
JJG2066-—2006
Big force value national standard
0.1MN-5MN
0.5MN-20MN
Standard dynamometer
1MN-5MN（20MN )
±3×10
Verification or comparison
Hydraulic force standard machine
IMN-5MN
≤5X10
≤X10
Special force source
F.1MN~50MN
3×103
Special dynamometer
IMN~60MN
1X10-1X10||tt| |S,±（1×10--1×10)
Standard dynamometer
IMN-30MN
±3×10
Measurement and calculation
Superimposed force standard machine
IMN~30MN
≤5X10
≤IX10
±5X10
Material testing machine
IMN-30MN||tt ||Working force instrument
IMN-50MN
±1x10
±3×10
±5X10
-iiKAoNiKAca
Gravity acceleration
Special testing machine
IMN-30MN
Note: Working measuring instruments may have new products or different names, and it is impossible to list all of them in the verification system table. For working measuring instruments not included in the verification system table, if necessary, according to their measurement, measurement range and working principle, refer to the measurement diagram and working principle of the working measuring instruments listed in the corresponding verification system table, and determine the appropriate value transmission method. Symbols: F—Force measurement model
Force measurement modelUpper limit
S—Long-term stability
R—Repeatability
U—Expanded uncertainty (measurement standard large-3, measurement standard or working measurement instrument k-2)
CL—Accuracy level
Appendix A
JJG2066—2006
System E, calculation
When comparing between force reference machines, the ABA method is usually adopted. Taking the comparison of two force reference machines A and B as an example, the test is first carried out on the force reference machine A, then on B, and finally on A. The test adopts the same procedure (the test procedure can refer to the relevant international comparison procedure for force values). When testing on force reference machine A or B, the standard uncertainty of the measurement result is calculated according to the following formula: Vum+up+upo+ue+uin+un
, where u is the standard uncertainty of the corresponding force reference machine, ur is the standard uncertainty caused by repeatability, urepre is the standard uncertainty caused by rotation effect, ur is the standard uncertainty caused by the resolution of the indicating instrument, uim is the standard uncertainty caused by the different loading time of force reference machines A and B, and uram is the standard uncertainty caused by the temperature difference between the laboratories where A and B are located. In the comparison test, the standard uncertainty caused by the drift of the output signal of the force sensor is:
u arit
, where and are the test data of the force reference machine A twice before and after, and is the average value of the two data.
The expanded uncertainty U of the measurement result on force reference machine A is calculated by the following formula, in which the factor is equal to 2. UA=2X
uep+up
, where uepre and uapo are the standard uncertainties of the measurement results of the force reference machine A twice before and after. The expanded uncertainty U of the measurement result on the force reference machine B is calculated by the following formula, in which the factor is equal to 2UeB=2XubZxz.net
where u is the standard uncertainty of the measurement result when testing on the force reference machine B. The relative deviation of the measurement results between the force reference machines A and B is ma
where: 2 is the test data on the force reference machine B. The coefficient E is calculated according to the following formula:
People's Republic of China
National Metrology Verification System Table
Great Force Measuring Instruments
JJG2066--2006
Published by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and published by China Metrology Press
No. 2, West Hepingli Street, Beijing
Postal Code 100013
Tel. (010) 64275360
http://zgjl.com.cn|| tt||Printed by Beijing Dixin Printing Factory
Published by Beijing Xinhua Bookstore
All rights reserved. No reproduction allowed
880mm×1230mm16-size
First edition in February 2007
Printing sheet 0.75 Word count 7,000 words
First printing in February 2007
Print count 1-1000
Standard book number 155026-2208
Price: 16.00 yuan
-KAONi KAca-2 Working dynamometer refers to a device with a measuring force range of LO greater than 1MN~50MN, a range of 1×10-2, 3×10-2 and 5×102, and a long-term accuracy level of 1, 3 and 5. The stability is ±1×10-2±3×10-2 and ±5×10-2. Working dynamometers should be tested in accordance with JJG455-2000 "Working dynamometer verification regulations" and their accuracy levels should be determined. 4.3.3 Dynamometers used for engineering measurement can be divided into dial indicator type, resistance strain type, piezomagnetic type and film cylinder type according to their structural principles.
5 Large force measuring instrument calibration system diagram (see the figure below) meter
Force value national standard
（EIMN)
Big force meter
JJG2066-—2006
Big force value national standard
0.1MN-5MN
0.5MN-20MN
Standard dynamometer
1MN-5MN（20MN )
±3×10
Verification or comparison
Hydraulic force standard machine
IMN-5MN
≤5X10
≤X10
Special force source
F.1MN~50MN
3×103
Special dynamometer
IMN~60MN
1X10-1X10||tt| |S,±（1×10--1×10)
Standard dynamometer
IMN-30MN
±3×10
Measurement and calculation
Superimposed force standard machine
IMN~30MN
≤5X10
≤IX10
±5X10
Material testing machine
IMN-30MN||tt ||Working force instrument
IMN-50MN
±1x10
±3×10
±5X10
-iiKAoNiKAca
Gravity acceleration
Special testing machine
IMN-30MN
Note: Working measuring instruments may have new products or different names, and it is impossible to list all of them in the verification system table. For working measuring instruments not included in the verification system table, if necessary, according to their measurement, measurement range and working principle, refer to the measurement diagram and working principle of the working measuring instruments listed in the corresponding verification system table, and determine the appropriate value transmission method. Symbols: F—Force measurement model
Force measurement modelUpper limit
S—Long-term stability
R—Repeatability
U—Expanded uncertainty (measurement standard large-3, measurement standard or working measurement instrument k-2)
CL—Accuracy level
Appendix A
JJG2066—2006
System E, calculation
When comparing between force reference machines, the ABA method is usually adopted. Taking the comparison of two force reference machines A and B as an example, the test is first carried out on the force reference machine A, then on B, and finally on A. The test adopts the same procedure (the test procedure can refer to the relevant international comparison procedure for force values). When testing on force reference machine A or B, the standard uncertainty of the measurement result is calculated according to the following formula: Vum+up+upo+ue+uin+un
, where u is the standard uncertainty of the corresponding force reference machine, ur is the standard uncertainty caused by repeatability, urepre is the standard uncertainty caused by rotation effect, ur is the standard uncertainty caused by the resolution of the indicating instrument, uim is the standard uncertainty caused by the different loading time of force reference machines A and B, and uram is the standard uncertainty caused by the temperature difference between the laboratories where A and B are located. In the comparison test, the standard uncertainty caused by the drift of the output signal of the force sensor is:
u arit
, where and are the test data of the force reference machine A twice before and after, and is the average value of the two data.
The expanded uncertainty U of the measurement result on force reference machine A is calculated by the following formula, in which the factor is equal to 2. UA=2X
uep+up
, where uepre and uapo are the standard uncertainties of the measurement results of the force reference machine A twice before and after. The expanded uncertainty U of the measurement result on the force reference machine B is calculated by the following formula, in which the factor is equal to 2UeB=2Xu
where u is the standard uncertainty of the measurement result when testing on the force reference machine B. The relative deviation of the measurement results between the force reference machines A and B is ma
where: 2 is the test data on the force reference machine B. The coefficient E is calculated according to the following formula:
People's Republic of China
National Metrology Verification System Table
Great Force Measuring Instruments
JJG2066--2006
Published by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and published by China Metrology Press
No. 2, West Hepingli Street, Beijing
Postal Code 100013
Tel. (010) 64275360
http://zgjl.com.cn|| tt||Printed by Beijing Dixin Printing Factory
Published by Beijing Xinhua Bookstore
All rights reserved. No reproduction allowed
880mm×1230mm16-size
First edition in February 2007
Printing sheet 0.75 Word count 7,000 words
First printing in February 2007
Print count 1-1000
Standard book number 155026-2208
Price: 16.00 yuan
-KAONi KAca-±（1×10--1×10)
Standard force gauge
IMN-30MN
±3×10
Measurement and calculation
Superimposed force standard machine
IMN~30MN
≤5X10
≤IX10
±5X10
Material testing machine
IMN-30MN||tt| |Working force instrument
IMN-50MN
±1x10
±3×10
±5X10
-iiKAoNiKAca
Gravity acceleration
Special testing machine
IMN-30MN
Note: Working measuring instruments may have new products or different names, and it is impossible to list all of them in the verification system table. For working measuring instruments not included in the verification system table, if necessary, according to their measurement, measurement range and working principle, refer to the measurement diagram and working principle of the working measuring instruments listed in the corresponding verification system table, and determine the appropriate value transmission method. Symbols: F—Force measurement model
Force measurement modelUpper limit
S—Long-term stability
R—Repeatability
U—Expanded uncertainty (measurement standard large-3, measurement standard or working measurement instrument k-2)
CL—Accuracy level
Appendix A
JJG2066—2006
System E, calculation
When comparing between force reference machines, the ABA method is usually adopted. Taking the comparison of two force reference machines A and B as an example, the test is first carried out on the force reference machine A, then on B, and finally on A. The test adopts the same procedure (the test procedure can refer to the relevant international comparison procedure for force values). When testing on force reference machine A or B, the standard uncertainty of the measurement result is calculated according to the following formula: Vum+up+upo+ue+uin+un
, where u is the standard uncertainty of the corresponding force reference machine, ur is the standard uncertainty caused by repeatability, urepre is the standard uncertainty caused by rotation effect, ur is the standard uncertainty caused by the resolution of the indicating instrument, uim is the standard uncertainty caused by the different loading time of force reference machines A and B, and uram is the standard uncertainty caused by the temperature difference between the laboratories where A and B are located. In the comparison test, the standard uncertainty caused by the drift of the output signal of the force sensor is:
u arit
, where and are the test data of the force reference machine A twice before and after, and is the average value of the two data.
The expanded uncertainty U of the measurement result on force reference machine A is calculated by the following formula, in which the factor is equal to 2. UA=2X
uep+up
, where uepre and uapo are the standard uncertainties of the measurement results of the force reference machine A twice before and after. The expanded uncertainty U of the measurement result on the force reference machine B is calculated by the following formula, in which the factor is equal to 2UeB=2Xu
where u is the standard uncertainty of the measurement result when testing on the force reference machine B. The relative deviation of the measurement results between the force reference machines A and B is ma
where: 2 is the test data on the force reference machine B. The coefficient E is calculated according to the following formula:
People's Republic of China
National Metrology Verification System Table
Great Force Measuring Instruments
JJG2066--2006
Published by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and published by China Metrology Press
No. 2, West Hepingli Street, Beijing
Postal Code 100013
Tel. (010) 64275360
http://zgjl.com.cn|| tt||Printed by Beijing Dixin Printing Factory
Published by Beijing Xinhua Bookstore
All rights reserved. No reproduction allowed
880mm×1230mm16-size
First edition in February 2007
Printing sheet 0.75 Word count 7,000 words
First printing in February 2007
Print count 1-1000
Standard book number 155026-2208
Price: 16.00 yuan
-KAONi KAca-±（1×10--1×10)
Standard force gauge
IMN-30MN
±3×10
Measurement and calculation
Superimposed force standard machine
IMN~30MN
≤5X10
≤IX10
±5X10
Material testing machine
IMN-30MN||tt| |Working force instrument
IMN-50MN
±1x10
±3×10
±5X10
-iiKAoNiKAca
Gravity acceleration
Special testing machine
IMN-30MN
Note: Working measuring instruments may have new products or different names, and it is impossible to list all of them in the verification system table. For working measuring instruments not included in the verification system table, if necessary, according to their measurement, measurement range and working principle, refer to the measurement diagram and working principle of the working measuring instruments listed in the corresponding verification system table, and determine the appropriate value transmission method. Symbols: F—Force measurement model
Force measurement modelUpper limit
S—Long-term stability
R—Repeatability
U—Expanded uncertainty (measurement standard large-3, measurement standard or working measurement instrument k-2)
CL—Accuracy level
Appendix A
JJG2066—2006
System E, calculation
When comparing between force reference machines, the ABA method is usually adopted. Taking the comparison of two force reference machines A and B as an example, the test is first carried out on the force reference machine A, then on B, and finally on A. The test adopts the same procedure (the test procedure can refer to the relevant international comparison procedure for force values). When testing on force reference machine A or B, the standard uncertainty of the measurement result is calculated according to the following formula: Vum+up+upo+ue+uin+un
, where u is the standard uncertainty of the corresponding force reference machine, ur is the standard uncertainty caused by repeatability, urepre is the standard uncertainty caused by rotation effect, ur is the standard uncertainty caused by the resolution of the indicating instrument, uim is the standard uncertainty caused by the different loading time of force reference machines A and B, and uram is the standard uncertainty caused by the temperature difference between the laboratories where A and B are located. In the comparison test, the standard uncertainty caused by the drift of the output signal of the force sensor is:
u arit
, where and are the test data of the force reference machine A twice before and after, and is the average value of the two data.
The expanded uncertainty U of the measurement result on force reference machine A is calculated by the following formula, in which the factor is equal to 2. UA=2X
uep+up
, where uepre and uapo are the standard uncertainties of the measurement results of the force reference machine A twice before and after. The expanded uncertainty U of the measurement result on the force reference machine B is calculated by the following formula, in which the factor is equal to 2UeB=2Xu
where u is the standard uncertainty of the measurement result when testing on the force reference machine B. The relative deviation of the measurement results between the force reference machines A and B is ma
where: 2 is the test data on the force reference machine B. The coefficient E is calculated according to the following formula:
People's Republic of China
National Metrology Verification System Table
Great Force Measuring Instruments
JJG2066--2006
Published by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and published by China Metrology Press
No. 2, West Hepingli Street, Beijing
Postal Code 100013
Tel. (010) 64275360
http://zgjl.com.cn|| tt||Printed by Beijing Dixin Printing Factory
Published by Beijing Xinhua Bookstore
All rights reserved. No reproduction allowed
880mm×1230mm16-size
First edition in February 2007
Printing sheet 0.75 Word count 7,000 words
First printing in February 2007
Print count 1-1000
Standard book number 155026-2208
Price: 16.00 yuan
-KAONi KAca-
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