To verify that the transducer is functioning correctly, complete the following steps:
About this task
- Ensure that the transducer is in place and the controlled system pressure is stable. Measure the pressure at the transducer with an accurate gauge. The resulting value is the measured pressure (P).
- Determine the maximum (Pmax) and minimum (Pmin) pressure values for the transducer’s pressure range. See Table 4 and Table 8 for more information.
Use the following equations to determine the calculated output voltage for the 0 VDC to 10 VDC and for the 0 VDC to 5 VDC transducers:
0 VDC to 10 VDC
0 VDC to 5 VDC
- Vo = Calculated output voltage
- P = Measured pressure
- Pmax = Max span
- Pmin = Min span
- 0 VDC to 10 VDC
- Measure the voltage between the transducer output and common (-) pins. See Table 2 for the pin out configuration. The resulting value is the measured output voltage.
Compare the output voltage calculated in Step 3 and the output voltage measured
in Step 4. If the measured output voltage differs greatly from the calculated
output voltage, replace the transducer.
Note: Under normal conditions, the transducer reading can differ from pressure meter readings due to voltmeter and pressure meter tolerances.