JJG 927-1997 Tire Pressure Gauge Calibration Procedure JJG927-1997 Standard download decompression password: www.bzxz.net
This procedure is applicable to the calibration of pointer-type and scale-type pressure gauges used to measure tire pressure, with a measurement upper limit not exceeding 2.5MPa, that are newly manufactured, in use, and after repair.

National Metrology Verification Regulation of the People's Republic of China JJG927—1997
Tire Pressure Gauge
Issued on October 24, 1997
Implementation on May 1, 1998
Issued by the State Bureau of Technical Supervision
JK: 927—157bZxz.net
Verification Regulation of
Tyre Pressure Gaugc
JJG927—1997
This verification regulation was approved by the State Bureau of Technical Supervision on October 24, 1997, and came into effect on May 1, 1998.
Responsible unit:
Shanghai Technical Supervision Bureau
Drafting unit: Tuhai Testing Technology Institute
The drafting unit is responsible for interpreting the technical provisions of this regulation. The main drafters of this regulation:
Shu Jiarong
Shao Wenrao
Yi Gendi
JJG 927—1997
(Shanghai Testing Technology Institute)
(Shanghai Testing Technology Institute)
(Shanghai Testing Technology Institute)
Technical requirements
Verification conditions
Verification month and verification method
Processing of verification results and verification period
Appendix Format of the back of the verification certificate
JJ Xin 927—1997
JJG 927--1997
Tire Pressure Gauge Calibration Procedure
This procedure is applicable to the calibration of newly manufactured, in-use and repaired tire pressure gauges with an upper limit of not less than 23mia and a gauge type pressure gauge (hereinafter referred to as pressure gauge):
Tire pressure gauges can be divided into two types according to their structural principles: one is the pointer type pressure gauge, in which the elastic sensing element in the instrument produces elastic deformation under the action of pressure, and through a mechanical transmission mechanism, pushes the pointer to indicate the pressure; the other is the gauge type pressure gauge, in which the support with the scale moves under the action of pressure and remains stable in one position, and the scale indicates the force value: both types of pressure gauges have a nozzle head connected to the tire valve end.
2 Technical requirements
1 Visual inspection
1. The series of pressure scale values ​​are: 1×10~, 2×10, S×10\, where is an integer or negative integer,
1.2 The interval between the scale lines should not be less than 1.25mm. 1.3 The width of the scale lines should not be less than 1/5 of the interval between the scale lines. 1.4 There should be no less than 4 scale lines marked with numbers. 1.5 Pointer-type pressure gauge
The scale name, counter position (symbol), manufacturer name (or trademark) and product number must be printed on the surface:
The width of the pointer tip should not be greater than 1/1 of the interval between the scale lines. 1.5.3 The distance between the pointer and the scale plate should be between: 13mm. 1.5.4 The pointer should extend to 173~-2/3 of all scale lines 1,6 Scale pressure gauge
1.0.1, the scale must have the name (or symbol) of the measurement unit 1,6.2 The manufacturer's name (or trademark) and product number should be printed on the shell of the pressure gauge, 1.? The pressure gauge parts should be assembled neatly and should not be loose, 2 General judgment
When the pressure decay and the air end are subjected to the measured force, there should be no phenomenon: 3 Zero return mechanism
3.1. The zero return mechanism of the pointer force gauge should be able to flexibly return the pointer to the zero value 32 The scale of the scale limit force gauge should be able to flexibly return to the zero value when the scale is pressed. 4 The accuracy grade and allowable error of non-force meters are shown in Table 1: -
Strict line
1.6 (1.5:
JJC9271997
The allowable error of the effective meter
Note: It is within the range of 5:5. The accuracy grade of the effective meter is not limited to the grade. Three verification conditions
5.1 Standard comfortable
Tube section type clean case original large decline into its text pressure meter Gan instrument, the allowable error of the snake to Yan: should be less than the allowable error value of the force meter to be tested by 14. 5.2! Other equipment
Gas pressure source;
Gas accompanying the force meter.
5.3 Ambient temperature, volume: (20 _5:.
54 as the intermediate point: case gas or research, the latter: other flow gas with stable chemical properties: West
calibration items unloading calibration method
6 external technical specifications in
the case should be carried out in accordance with Article 1 of the specification, the separation of the seal Kai pick up the inspection
7. [On the gas pressure calibrator, produce the upper limit value of the pressure. 2 Install the gas instantaneous head on the pressure gauge: 3 Connect the gas head of the pressure gauge with the reverse rigid of the tester , let the gas enter the small meter and point to Ershan letter! The result should meet the requirements of Article 2.
, 4 The whistle head should be checked in reverse direction according to the above method, 8 Small constant error verification
8.! You can use the small value verification at each division of the teaching word. 8. The number is read to the 15th division value
8. Put the power meter product on the gas pressure calibration and verify it point by point with the output standard - when Chuan!: 8.1, 8.2 provisions of the material, true To the measured service value, the total error shall meet the requirements of Article 4, and the low error factor calculation formula is as follows:
Wu Zhong: p-
indication error of the calibration point;
indication of the calibration point:
IJG927—1997
P indication of the pressure standard screen of the calibration point:
9 When checking the zero mechanism of the zero mechanism, it shall meet the requirements of Article 3: Five calibration results Processing and verification period
10 The pressure gauge that meets the requirements of this regulation after verification is qualified and will be issued a verification certificate 1 (see attached). For the pressure gauge that meets the requirements of this regulation after verification, a verification result notice will be issued, and the unqualified items will be indicated: 11 The verification period of the pressure gauge can be determined according to its usage, generally more than half a year, 3
IJG9271997
Format on the back of the verification certificate
After verification, the pressure gauge must meet the requirements of the National Metrology Verification Regulations (927-1997)
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