1. Visual inspection:
-Check the appearance of the pressure gauge for obvious damage, crack or deformation.
-Check whether the scale on the dial is clear and readable, and whether the hands are in good condition.
-Check whether the pointer can move freely and there is no jam or jam.
2. Pressure test:
-Ensure that the fire pump is turned off and connect the pressure gauge to the pump room system.
-Start the fire pump, gradually increase the system pressure, and observe the movement of the pressure gauge pointer.
-Check whether the pointer is stable within a reasonable pressure range and ensure that the pointer does not flicker or jump.
3. Pressure calibration:
-If the pressure gauge pointer is not accurate, it can be calibrated with a professional pressure calibration instrument.
-Connect the calibration instrument to the pressure gauge and perform calibration under a known and accurate pressure source.
-According to the reading of the calibration instrument, adjust the zero-setting screw or zero-setting device on the pressure gauge to make the pressure indication accurate.
4. Pressure release test:
-Turn off the fire pump and open the pressure reducing valve in the system to release the pressure in the system.
-Observe whether the pressure gauge pointer returns to zero scale. If the pointer does not return to the zero scale, there may be a leak or other fault.
5. Record the test results:
-Record important information such as initial reading, calibration and pressure release test results of the pressure gauge.
-If any abnormality is found, such as inaccurate reading, unstable pointer or other problems, write down a detailed description and report the repair or replacement in time.
Please note that the above steps provide general guidance, and the best practice to ensure safety and accuracy is to seek trained and experienced professionals for testing and maintenance.