The ratiometric versions of the P598 Series transducer receive a constant 5 VDC nominal supply voltage and vary the output signal voltage, based on the sensed pressure. The output voltage varies from 10% to 90% of the supply voltage, and provides a 0.5 VDC to 4.5 VDC nominal signal.
About this task
Note: The 0.5 VDC to 4.5 VDC ratiometric transducers are rated for 5.0 ±0.25 VDC, safety extra-low voltage (SELV), or Class 2. Exceeding the supply voltage rating can damage the transducer and void any warranties.
To verify that the transducer is functioning correctly, complete the following steps:
- Ensure that the transducer is in place and the controlled system pressure is stable. Measure the pressure at the transducer with an accurate pressure meter. 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 2 and Table 7 for more information.
- Measure the voltage between the red supply wire and the black common wire. Use this value in Step 4 as the measured supply voltage (Vs).
Use the following equation to determine the calculated output voltage for the ratiometric transducer:
- Vo = Calculated output voltage
- Vs = Measured supply voltage
- P = Measured pressure
- Pmax = Max span
- Pmin = Min span
- Use your multimeter to measure the DC voltage between the transducer output and common (-) pins. This value is the measured output voltage. See Table 2 for the pin out configuration.
Compare the output voltage calculated in Step 4 and the output voltage measured
in Step 5. If the measured output voltage differs greatly from the calculated
output voltage, replace the transducer.
Note: Under normal conditions, the transducer reading differs from pressure meter readings due to voltmeter and pressure meter tolerance.