弹簧管式精密压力表及真空表检定规程(国外英文资料).docVIP

弹簧管式精密压力表及真空表检定规程(国外英文资料) The information that is worth having It comes from the general learning accumulation summary There must be a problem Please be critical! 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