气体活塞式压力计工作介质对量值传递的影响OA

Masteel Pressure Laboratory adopts air as the working medium of the gas piston pressure vacuum gauge.The status survey of the gas piston pressure vacuum gauge in use reveals that there are fine impurities between the piston cylinder and piston connecting rod,which affect the normal use of the gauge and the traceability of the measurement value.In this context,it is proposed to use pure nitrogen instead of air as the working medium of the gas piston pressure vacuum gauge,and the effect of using nitrogen as the medium on the work of the piston pressure gauge's value trans-fer is observed through experiments.