Before you begin
Important: The 0.5 to 4.5 VDC ratiometric
transducers are rated for 5.0 VDC ± 0.5 VDC safety extra-low voltage (SELV). If you exceed
the supply voltage rating, you could damage the transducer and void any warranties.
Procedure
- Before you apply power, check all wiring connections.
- Put the transducer in place, apply power, and wait for the controlled system pressure to stabilize.
- With the controlled equipment under normal conditions, take the measured pressure (P) at the transducer with an accurate and reliable pressure meter. If the control does not operate correctly, stop and troubleshoot the issue.
- Determine the maximum (Pmax) and minimum (Pmin) pressure values for the transducer’s pressure range (Table 1 and Table 2).
- Measure the voltage between the supply wire (red) and the common wire (black). This value is the measured supply voltage (VS).
- Use the equation in Figure 1 to determine the calculated output voltage for the ratiometric transducer.
- Use your multimeter to measure the DC voltage between the transducer output and common (-) pins. See ips1628774249782.html#ips1628774249782__ordering_bulk_quantities_of_non_standard_p599_transducers-table_2 for the pin out configuration.
-
Calculate the measured output voltage with the following
equation:
Figure 1. Voltage calculation for 0.5 VDC to 4.5 VDC ratiometric transducers
VO = Calculated output voltage
VS = Measured supply voltage. 4.5 VDC to 5.5 VDC.
Pin = Measured pressure
Pmax = Maximum pressure
Pmin = Minimum pressure
-
Compare the calculated output voltage and the measured output voltage.
If the measured output voltage differs greatly from the calculated output voltage, replace
the transducer.
Note: It is normal for the transducer reading to differ somewhat from pressure meter readings due to voltmeter and pressure meter tolerances or other factors.