RTD sensor wiring

Davide Armenante

Posted on 30.11.2021 15:00

I need to connect a generic 3 wire RTD sensor to a IOLITEi-1xSTG through a DSI-ACC adapter.

The IOLITE is powered by the computer through ethernet. 

I followed the "Accessiories and sensors manual" which provides the following wiring schematics at page 21. 

From what I understand, I need to connect only pins 2, 3, 4. The jumps between 1-2 and 3-4-5 are internal to the DAQ. 


I solded the 5-pin BINDER connector following the 3 wire schema schema but on setup inside the DewesoftX software the 4 wire schema is shown and the sensor reads almost no resistance. 


What am I doing wrong? Thank you in advance.

Rok Kmetič
Customer Support Engineer
Posted on 02.12.2021 11:31

Dear Davide,


Thank you for reaching us. Unfortunately, the DSI-ACC adaptor is not suitable for resistance measurement. But I think this was just a typo because you are referring to page 21 in the accessories manual which is correct. Only the DSI-RTD adaptor has a built-in binder connector.


You have made the correct wiring, but if you want to use the 3-wire connection you need to manually connect pins 1 & 2 together and also the pins 3 & 5. This will give the RTD sensor power and the measurement will be correct.


DewesoftX has a ''universal'' picture for the measurement (with the dotted lines), for the manual, we have made all connections options more visible.


In the picture below I have marked the connections:


Please let me know if this would solve the problem. 


Best Regards.

Rok

Davide Armenante

Posted on 13.12.2021 09:40

Thank you for the reply.


As you said it was a typo, sorry for that, I'm using a DSI-RTD adapter.

I connected the sensor as you showed in the picture but I'm encountering the same problems, I'll leave you two screenshots


Davide Armenante

Posted on 13.12.2021 11:49

My mistake due to inexperience! A little short circuit, thank you for the kind reply.

Rok Kmetič
Customer Support Engineer
Posted on 13.12.2021 13:52

Dear Davide,


I'm glad to hear that you were able to sort it out and thanks for letting me know.


Best Regards.

Rok

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