Erratic analog input

[FranzPLC 0]

Hi guys,

I am testing a RTD using omron and the input value is erratic. I also series a multimeter but the current is stable. How can I solve this?

[kath_kath 0]

Are you using analog module like AD081 ? Use R/I to convert the resistance of rtd to current then use this as an input to your module.... Make sure to loop your R/I to your module.

Edited 16 Mar 2018 by kath_kath

[innoaloe 57]

RTD outputs resistance... not current...
As kath_kath said you need a signal converter from RTD to 4-20 mA current before inserting it to the analog input module.

Alternatively you can purchase a Temperature Input Module like TS001 which can be coupled to RTD or Thermocouple directly