This designation outlines the procedure for calibrating pressure gauges used for standard laboratory testing. It is recommended that any adjustments to a pressure gauge be made only by experienced personnel or the manufacturer.
A master gauge is calibrated using a primary pressure standard. The pressure gauge to be calibrated is connected to the master gauge as shown on figure 3b.
Pressure is applied to the pressure gauge at predetermined pressure increments over its full operating range. The value indicated by the pressure gauge is compared to the corresponding value indicated by the master gauge at each pressure increment.
The percent error between the two values is calculated and the gauge is adjusted as necessary.
Calibrating Pressure Gauges.pdf (1.5 MB)