4-20ma output signal

Thread Starter

switchback

Joined Aug 19, 2009
2
we are always needing our fluke meter to source in a 4-20 ma signal for different applications while troubleshooting problems. we only have 1 meter. Is it possible someone could tell me how to turn a 24 vdc power supply into a variable 4-20 ma signal.
 

t_n_k

Joined Mar 6, 2009
5,448
Perhaps a simple analog solution such as attached - conceptual only. Might need to be more complex to provide protection etc.

Do you need galvanic isolation?

What are your required specifications, such as maximum loop resistance etc?
 

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Thread Starter

switchback

Joined Aug 19, 2009
2
Looks good! did you purchase the parts and build it yourself. if so do you have a parts list. I am not an electronics expert but, If I have part numbers and a print like you provided me I can build it. I guess not so much the individual components because they are on the print but, maybe a board # to build it on
 

peranders

Joined May 21, 2007
87
You could also use a plain lab PS and put a resistor in series and possibly use the current limit set to a low value just for protection.
 
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