Correct use of piston pressure gauges

Choice of range
According to the measurement range you need, try to choose the range specified in the verification regulations, so that it is convenient to choose the standard of the corresponding range for measurement when carrying out the verification work. When purchasing pistons, it must be noted that the regulations stipulate that small range pistons can be tested for large range pistons, and large range pistons can not be tested for small range pistons.

Working medium
There are three main working media, namely gas (air or nitrogen), transformer oil, sebacate grease. The verification regulation JJG 59-2007 only deals with liquid working media. At present, the imported piston pressure gauge has only one working medium, and the domestic piston pressure gauge has two working media, which must be selected in line with the principle that the standard piston and the tested piston should use the same working medium, otherwise you will not be able to carry out the verification work. Because the transfer between different working media will cause problems, if the working medium is transformer oil piston placed on the working medium is sebacic acid piston calibration platform, then the piston duration will be shorter, in turn, the working medium is sebacic acid piston placed on the medium is transformer oil calibration platform, then the piston decline speed will be faster.