Transmitters
121
Checking the oil pressure transmitter by measuring the resistance
0
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bar
Ω
1
2
If the oil pressure transmitter is to be checked, the oil pressure must be measured with a second, indepen-
dent instrument. Disconnect the gauge from the transmitter. Measure the resistance and compare it with
the calibrated curves.
Curve 1: Pressure transmitter for 1 electrical instrument
Curve 2: Pressure transmitter for 2 electrical instruments
Pressure transmitter for 1 electrical instrument: checking values and tolerance of transmitter resistance
Pressure (bar) 0 2 4 6 8 10
Comparative resistance Ω 10 ± 6 52 ± 6 88 ± 6 124 ± 7 155 ± 7 184 ± 10
Pressure transmitter for 2 electrical instruments: checking values and tolerance of transmitter resistance
Pressure (bar) 0 2 6 8
Comparative resistance Ω 5 +1.8/ -3 25 ± 2.4 64 ± 3 78 ± 3
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