Answer / jazz

Use a smart communicator device such as HART
calibrator/communicator. Connect it across +/- terminals,
whether in the instrument, junction box, marshalling, or
system cabinet, then initiate communication with the smart
transmitter. If you calibrate on-line, the HART communicator
will ask you to put device in manual, and advise control
room that you are calibrating the HART transmitter. Using
the HART communicator use loop/calibrate function and
simulate, 4,12,20 mA corresponding to 0%,50%, 100% of level
or pressure.

Which type of pressure can be measured by these elements?

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I saw one P&ID 6" control valve has been connected with 8" process line, and 2" valve also connected in parallel with 6" valve. why the 2" valve connected in parallel, Is there any technical reason. please clarify. With Regards-Kittu

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