How to choose a pressure gauge calibrator

The selection of the pressure gauge calibrator should be viewed from the following aspects:
1. The type of meter to be calibrated (whether or not oil is prohibited), if oil is not prohibited, the selection range is relatively large, including: servo oil pressure calibration table, desktop manual hydraulic source, portable hydraulic source, etc., verification of oil prohibited table can be selected: Servo air pressure source, desktop manual air pressure source, portable air pressure source, manual water pressure source, etc.
2. The range of the meter to be calibrated: the hydraulic pressure at the high range and the air pressure at the bottom of the range
3.According to the accuracy of the meter to be calibrated: the accuracy of the meter to be calibrated is generally (less than 0.4 level).
4. High accuracy of the calibrated meter, generally choose the dead weight tester