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Section IX Pressure Transducer Check
PD Pump Pressure Transducer (Psia vs VDC)
Vdc to pressure
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
0 50 100 150
Psia
VD
Vdc
Psia Vdc Psia Vdc Psia Vdc Psia Vdc Psia Vdc
0 0.50 35 1.43 70 2.35 105 3.28 140 4.22
5 0.63 40 1.56 75 2.49 110 3.42 145 4.35
10 0.77 45 1.69 80 2.62 115 3.55 150 4.50
15 0.90 50 1.83 85 2.75 120 3.68
20 1.03 55 1.96 90 2.88 125 3.82
25 1.17 60 2.09 95 3.02 130 3.95
30 1.30 65 2.22 100 3.15 135 4.09
To test the Transducer:
Use a voltmeter set to measure volts dc and measure across the ground wire and the V-out wire.
Look at the chart above and find the voltage - it should correspond to the pressure next to it. If a
pressure transducer is not working do the following.
Measure the 5vdc going to the xducer. If missing, check all connections and wiring. If it is
all good replace the control board. If you have voltage out of the xducer all the way back to
the controller also replace the controller. If you have input voltage to the xducer and no
output voltage, replace the xducer.
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