Which statement best describes how to verify the accuracy of discharge gauges?

Which statement best describes how to verify the accuracy of discharge gauges?

• A. Calibrate against a known reference gauge; verify zero reading; test under operating pressure; check for leaks; document
• B. Balance multiple gauges before use
• C. Document readings after the test without calibration
• D. Calibrate only at zero pressure and rely on visual check

Answer: (A)

Discharge gauge accuracy must be verified against a known standard and checked across the conditions you'll actually operate under. Start by calibrating the gauge against a known reference gauge to establish a traceable baseline. Then verify the zero reading when the system is depressurized to ensure there’s no offset that could skew all readings. Next, test the gauge under operating pressure to confirm it responds correctly across the full range you’ll use in the field, catching any drift or nonlinearity that only shows up under pressure. Finally, check for leaks and other issues that could affect the signal, and document the process and results so maintenance personnel can review and track performance over time. Balancing multiple gauges won’t guarantee an individual gauge’s accuracy, and documenting readings without calibration doesn’t prove the readings are correct. Calibrating only at zero pressure and relying on a visual check misses the need to verify accuracy across the operating range.

Discharge gauge accuracy must be verified against a known standard and checked across the conditions you'll actually operate under. Start by calibrating the gauge against a known reference gauge to establish a traceable baseline. Then verify the zero reading when the system is depressurized to ensure there’s no offset that could skew all readings. Next, test the gauge under operating pressure to confirm it responds correctly across the full range you’ll use in the field, catching any drift or nonlinearity that only shows up under pressure. Finally, check for leaks and other issues that could affect the signal, and document the process and results so maintenance personnel can review and track performance over time.

Balancing multiple gauges won’t guarantee an individual gauge’s accuracy, and documenting readings without calibration doesn’t prove the readings are correct. Calibrating only at zero pressure and relying on a visual check misses the need to verify accuracy across the operating range.