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弹簧管式精密压力表及真空表检定规程(国外英文资料)
弹簧管式精密压力表及真空表检定规程(国外英文资料)
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Spring tube type precision pressure gauge and vacuum gauge calibration procedure
JJG 49-87 instead of JJG 49-72
Regulation of the Precise Bourdon Pressure Gauge and Vacuum Gauge
This verification procedure was approved by the national bureau of measurement on April 11, 1987
It has been in effect since October 1, 1987
Unit: Shanghai standard measurement bureau
Drafting unit: the metrological management bureau of Shanghai standard metrology authority
The technical provisions of this discipline shall be interpreted by the drafting unit
The main drafters of this discipline:
Xujiarong (bureau of metrological management)
Spring tube type precision pressure gauge and vacuum gauge calibration procedure
This procedure applies to new manufacturing, use and repair of measurement limit of 0.1 ~ 250 mpa spring tube type precision pressure gauge and vacuum gauge verification (hereinafter referred to as the precision table)
Technical requirement
1 precision table Pointers (including replacement Pointers) should be within 0.5 to 1.5 mm range of surface. Its blade is perpendicular to the surface of the dial
The pointer indicates that the end should be reached in the shortest dividing line 1/4 ~ 3/4
The end width of the pointer blade should not be greater than the dividing line width
Precision watch dial and surface glass should not interfere with reading defects and damage
The zero position of the dial is not allowed to have a stop pin
The dial width should not be greater than 0.2 mm
The precision of 3000 points should be evenly spaced
The full length of the outer arc of the graduated ruler should meet the provisions of table 1
Table 1
The movement of the precise table pointer should be stable throughout the range
No jumping or jamming
The sealing device of the precision watch
In case of no damage to seal
Cant touch the i
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