Testing the discharge pressure gauge begins by?

Testing the discharge pressure gauge begins by ensuring that the system is safely shut down and depressurized. Next, the gauge is isolated from the system, often using valves, to prevent any fluid from affecting the measurement. A calibrated pressure source is then connected to the gauge, and the readings are compared against the known pressure value to determine accuracy. Any discrepancies may indicate the need for recalibration or replacement of the gauge.