Omega PCL340 - Manual (Page 22)

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7.2 Calibrating a Pressure-to-Current Transmitter
To calibrate a pressure-to-current transmitter (P/I), perform the
following steps:
1. Connect the calibrator and the pump to the transmitter.
2. Apply pressure with the pump.
3. Measure the current output of the transmitter.
4. Ensure the reading is correct. If not, adjust the transmitter as
necessary.
Figure 11.
7.3 Percent Error Function
The calibrator features a unique function which can calculate
pressure vs. milliamp error as a percentage of the 4 to 20 mA loop
span. The percent error mode uses all 3 screens and has a unique
menu structure. It simultaneously displays pressure, mA and
percent error.