Answer / r.murugan

STATUS INDICATION:

1. ON STATUS / 2.OFF STATUS / 3. DISTRUBANCE STATUS / 4.FAULT

Answer / aswin

Start indication
Stop indication
Local/remote indication
Trip indication
Swgr permit available/mcc disturb

A pressure differential gauge type of instrument has a manifold with 2 isolation valves (hp and lp),2 vents(1 each for hp and lp) and 1 equalizing valve. Determine the position of each valve(either fully closed or fully open) when troboulshooting to: 1. zero the transmitter. 2. determine if there is a block in the impulse line. 3. determine if the gauge is functioning properly. The process fluid is water.

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Why we use 250 ohm resistor in series with HART protocol communication?

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PLEASE PROVIDE SAMPLES OF CHEVRON SKILL TESTS

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What is loop checking ?

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why use 4-20mA in the field of instrumentation?

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