Pressure gauge calibration procedure.

 


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alibrating pressure gauges is essential to ensure their accuracy and reliability. Let’s walk through the procedure step by step:

 

  1. Inspect the Gauge:
    • Begin by examining the pressure gauge for any physical damage that might affect its performance.
  2. Connect to Calibration Device:
    • Connect the pressure gauge to a calibration device (such as a pressure comparator or hand pump calibrator).
    • The calibration device will apply known pressures to the gauge during the calibration process.
  3. Record Readings:
    • As pressure is applied, record the readings from the pressure gauge.
    • Compare these readings to the known values provided by the calibration device.

Remember that the specific calibration procedure may vary based on the type of pressure gauge and the equipment available. If you have access to a pressure comparator and a master gauge, here’s a more detailed procedure:

  1. Identify Parameters:
    • Determine the basics parameters of the pressure gauge under calibration (UUC):
      • Class of Pressure Gauge
      • Minimum/Maximum Range of Pressure Gauge
      • Least Count (calculate the lines between major markings)
      • Measuring Unit (e.g., bar)
  2. Master Equipment:
    • You’ll need two key pieces of equipment:
      • Pressure Comparator: Operates similarly to a dead-weight tester. Compare the UUC with a master gauge.
      • Master Gauge: A digital gauge used for calibration in ISO 9000 qualified laboratories.
  3. Calibration Steps:
    • Set up the equipment as shown in the figure:
      • Place the Master Gauge on the left.
      • Position the UUC (pressure gauge) on the right.
    • Use the handwheel to pump liquid in the comparator until the desired pressure is reached.
    • Calibrate the pressure gauge for various readings (e.g., 2, 4, 6, 8, 10 bar) in comparison with the Master Gauge.

Remember to follow any additional guidelines specific to your pressure gauge type and equipment. Proper calibration ensures accurate measurements and reliable performance


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