PT 100 to PT1000 Conversion

[ktmtragic]

Hi Guys


Is it possible to covert a PT100 signal to PT1000 ? Please don't tell me change the probe !!! NOT Possible. I am thinking a PLC to do the analog conversion. Anyone know of a simple solution ?
Thanks

 

[Puddle]

Possibly. There's a lot of different ways to have that signal get back to your PLC. Is it directly wired, does it go through a conditioner, what PLC, what I/O module?

 

[ktmtragic]

Nothing wired yet. Have a dual output PT 100 probe that I would like to use one output convert to PT1000 and send to the instrument. The other output is used by the machine. Haven't picked a PLC or conditioner just exploring my options at the moment.
Thanks

 

[Puddle]

Does your instrument specify PT1000 input and it's not configurable?

 

[ktmtragic]

Yes no ability to change the input

 

[BryanG]

This has been asked before and no simple answer was found:
http://www.plctalk.net/qanda/showthread.php?t=79526

I think the obvious answer is to get a Dual PT1000 sensor and a PLC input to match, or convert one of the PT1000 sensor outputs to 4-20mA and run that to the PLC.

 

[JesperMP]

I would always go for a temperature probe with integrated 4-20mA transmitter.
But barring that, many PLCs have RTD inputs that are configurable for a range of sensor types. So you can have Pt100, Pt1000, Ni1000 going into the same RTD card.

 

[Puddle]

You can get a signal conditioner that would solve the issue, like this:
https://uk.rs-online.com/web/p/signal-conditioners/1448687
Or just mount a second probe right next to the original.
I'm probably wrong in saying this, but I'm not aware of a PLC output module that can simulate a resistance output.

The usual solution is to use a conditioner to give you an analog signal, or find some serial communication method for your instrument, but if you must use PT1000 and you've only got PT100, options are limited.
What is the instrument you're trying to connect to?

 

[cardosocea]

Which instrument is this?