The main differences between a hydraulic and pneumatic deadweight tester are that the hydraulic tester is operated by a liquid under pressure while a pneumatic tester is operated by air or gas. The difference between a hydraulic and pneumatic deadweight tester People refer to a deadweight tester in many ways including: The pressure stability is especially noticeable when compared to the option of pressure comparators with digital gauges. The basic steps to perform calibration with a deadweight tester include attaching a pressure measurement device to the tester, applying a series of weights to generate known pressures, and comparing the known pressures to pressure readings from the device under test.Īdvantages of using a deadweight tester to calibrate pressure measurement devices arethat they cover a wide range of pressures and offer very stable pressures when calibrating devices. Deadweight tester calibration is the act of comparing the readings of a device under test, such as a pressure gauge, to the known pressures produced by precise weights.
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