1. Set up the differential pressure transmitter, HART communicator, power supply, hand pump, and the multimeter as below (see below calibration setup file).
  2. Make sure the equalizing valve manifold is closed.
  3. Apply a pressure to the transmitter equal to a lower range pressure (usually it correspond to 4 mA in the transmitter output). For example we have 0 to 100 mBar calibrated range, then the lower range pressure is 0, or let’s say we have -2 psig to 5 psig then we have lower range pressure equa...

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