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Answer Posted / saravana kumar
Higway Adressable Remote Transducer(digital signal) is a
digital circuitry in a transmitter, which is superimpossed
on analog 4 to 20 mA.This superimpossed signal is seperated
in I/O module and 4 to 20mA signal is given to the control
system and HART(digital signal)is given to Asset Management
System
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when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??
A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?
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