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I don't have any experience of working with smart type HART feild devices and this is becoming more problematic for me now.
I want to know the calibration procedure of the HART transmitters.
I did calibration of analog transmitters only.
I already did enough home work about this calibration thing of smart transmitter but where I found difficulties when I came across the words like zero trim, sensor trim and o/p trim.
As we have single output of the transmitter and from there we will get signal of 4-20 mA. How we can trim the current from same terminal for all and how to find which trim needed for transmitter.
last thing is how the trim function is different then zero and span adjustment.
I want to know the calibration procedure of the HART transmitters.
I did calibration of analog transmitters only.
I already did enough home work about this calibration thing of smart transmitter but where I found difficulties when I came across the words like zero trim, sensor trim and o/p trim.
As we have single output of the transmitter and from there we will get signal of 4-20 mA. How we can trim the current from same terminal for all and how to find which trim needed for transmitter.
last thing is how the trim function is different then zero and span adjustment.