Pressure gauges can be calibrated with one of the following methods:
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Using Dead weight tester by calculating the actual pressure generated with the help of area of the piston, local ‘g’ and applied known mass while comparing.
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Using Dead weight tester by comparison method using the nominal pressure values mentioned on the pressure weights of the Dead weight tester.
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Using Digital Pressure Calibrator.
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By comparison method using a Digital /analog pressure gauge and pressure generating system.
Method I: Reading as per set on DUC
Method II: Reading as per set on standard