JJG 2066-1990 Calibration system for large-capacity measuring instruments JJG2066-1990 Standard download decompression password: www.bzxz.net

The National Metrology Verification System of the People's Republic of China JJG2066-90
Great Force Measuring Instruments
Approved on September 7, 1990
Implemented on February 1, 1991
State Technical Supervision Bureau
Great Force Measuring Instrument Verification System
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JJG2088-
This national meter verification system has been approved by the State Supervision Bureau for 11 years! H7H and will be implemented on February 1, 1991.
Drafting unit:
China Measuring and Material Science Research Institute
This technical document of the verification system is responsible for the interpretation. The main drafters of this verification system!
Li Zhenmin
Drafting person:
Yue Songde
[Ningzhou Institute of Metrology)
(China Metrology Research Institute)
(China Institute of Metrology)
Metrology standard instrument
A measuring instrument
1 Working instrument
Manual value measuring instrument system diagram
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JIG206680
Verification system for large force measuring instruments
Total 3 pages Page 1
This verification system is used for the verification of force measuring instruments with an upper limit of more than 1MN to 50MN. It specifies the procedures and methods for the verification of the value from the national standard to the working instrument through the recording standard, and specifies the corresponding determination degree. This system is to ensure that the reliable and reliable instruments meet the corresponding indicators and provide guidance for their traceability.
Metrology reference instruments
1. National standards for large and small values
1.1 Large and small value measurement reference instruments are national base bands. It is the most commercially available one that reproduces the national human value (×1MN) in the following way: 1.2 The national standard can be composed of two large force reference test parts, one is a 511N lifting dynamometer, the other is a 20MN standard test machine. The standard test is limited to trial and life test, and can be used as a reference for one year.
1.3 The reference test range is 0.1-5M, and the range is 0.~2.MN (range force). The total standard is 2×10:3>N (3 in the range of 0.~2VM for the reference test machine of 310-3
1420M). ~,MN【拉可, the total minimum accuracy is 1×(：., in order to ensure the accuracy and consistency of force value, the force level of large force value measurement range less than 1MV should be regularly compared with the static weight type basic machine as the national force value; for the force level greater than 1MN, it should be compared with the same foreign standard measuring machine.
3. Metrological standard instruments
2. Large force measuring standards are divided into two categories. The first category is the measurement standard instrument with fixed value, called large value standard force measuring machine, and the second category is the most reliable type (or test) measuring instrument, called large value non-force measuring machine, 3. But the standard is difficult to mark
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3.1 The standard force value of the large pool machine is a machine that has been inspected for years and has a force measurement range of 0.1V. However, the standard force measuring machine has been certified for 3.2. The force measurement range is 0.1V. However, the standard force measuring machine has a total uncertainty of 5>:0-1 (3×10:3). 3.8 The standard force measuring machine also uses 1UMN, and its total uncertainty is set to 10 (3×10-3).
31 The standard force measuring machine also produces a value (the measurement time limit is 1MV: its total uncertainty is better than 1×10 (3) when it is installed. Can be used as a force measuring machine for large force values: 4 Human force standard measuring image
4.1 Human force value standard measuring method refers to the standard force measuring value determined by the experts, and the upper limit of the standard is greater than 1MN. According to its structural principle, it can be divided into safety display type, mercury type, electric sub-strain type and three-micrometer type. 2 The main technical indicators of large force measurement are: gravity, diagnostic efficiency, expectation, multiple additions, and changes in the measured data: the change of the measured data after several times (months, years) and the last measurement: 1.3 The country needs to use the standard measuring method for the calibration. (Comparison) The upper limit of the measurement is 5M (20MN) and the accuracy is 0.03 level, and the stability is -.
4.4 The standard force gauge that is passed between the standard force gauge and the needle material testing machine, special testing machine, and special force gauge: its upper limit of the measurement range is 3M, and the accuracy level is divided into 0.1 level, 0.3 level and 0.5 level, and the corresponding measurement and total accuracy are 1×10-, 3x10-15xi0-
Three working measuring instruments
The force gauge is divided into two categories, the first category also includes material testing (large parts testing machine), special test monitoring machine (including pin chain testing machine) and special force source. The second category includes special measuring instruments and working measuring instruments. FJG28-90wwW.bzxz.Net
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6Material testing machines, special testing machines and special force sources must be tested according to the corresponding verification procedures or in reference to relevant regulations using standard test methods, and the accuracy level must be determined. Large material testing machines and component testing machines: The upper limit of the micro-measurement range is 3MN, and its accuracy levels are divided into 0.5, 1 and 7 levels. 8 The value of the special testing machine (including chain cylinder test) must be within the upper limit of 30MN, and its accuracy should be grade 2.
9 The value of the special force source is regarded as the upper limit of 50MN, and the total uncertainty is not less than 3JC-(3).
10 The special German standard dynamometer is determined by the national basic certification of the large force value. The measurement range of the special force measuring machine is MN. Its excellence and stability are -
11 Working force measurement only refers to the force measurement used for work error measurement. Its test range upper limit is: MN to MN. The accuracy level is divided into level 1, 3 and 5. The electrical compensation and stability of the machine are 1× respectively. 1, 3×10 and 5×10-. 12 There are four types of force measurement instruments: the force value range, the range of force measurement, the range of small-scale flow measurement, the total force uncertainty (3), the repeatability, the stability, the level of lubrication, the accuracy level, the degree of lubrication, the degree of stability ... MN
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