POWER PLANT INSTRUMENTATION & CONTROL

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Materials reqd- 1. Data Sheet , 2. Multimeter , 3. Pressure calibrator , 4. Hart Comm , 5. Tester & Slide range

PROCEDURES...
1. Force the transmitter from DCS/PLC if it comes under any tripping circuit.
2. Connect the HART Communicator & note down the LRV , URV , TAG , UNIT , PV , DAMPING etc.
3. Isolate the transmitter from process.
4. Release both side pressure & drain the low and high side liquid by drain valve.
5. Connect pressure calibrator to the high side, keeping low side open to atmospher...
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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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