Before starting the pressure calibration, we must first confirm which media to use. we Should try to use the same or similar media as the working medium, the priority choice of high security, low pollution or pollution-free medium.


  First, 250kPa or lower range of pressure gauges,that using gas as the test medium, we recommended to use air as media.
  Second, 250kPa pressure gauge or higher pressure,that use liquid as a test medium. (except for non-oil instruments,this instrument usually recommended nitrogen gas as a medium of transmission).
When using the liquid as the pressure transmitting media, we should pay attention to the cleanliness of the gauges uder-test, so as to avoid the pollution of Pressure calibration instruments.
Related Readings: Electric Vacuum pressure calibration   Hydraulic Pressure calibration pump