4-20 current limiting

cjd1965 said:
Hi I have a temperature transmitter which has a PT100 to 4-20mA converter built into it

The chart recoder was replaced and this channel is broken/not indicating.

The recorder vendor is saying that it has a resistor across the terminals and that i should limit the current.....shouldnt the head unit limit the loop current to 4-20 ?

I think they are talking nonsense
Click to expand...

Is the head unit (pt100 converter ) 2 or 4 wire?
 

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