RTD Checks Procedures

It depends on the type of RTD, which the forum doesn't know about.

For example, a Pt100 RTD has a resistance of 100Ω at 0degC. There are tables of resistance versus temperature for each type, and the table and the trip setting should be compared to make sure that the trip point is valid.

To check the RTD fully, you need to determine independently what temperature it is measuring. One way would be to have another sensor at the same location, and compare. A second way would be to remove the RTD and place it in known temperatures, such as an ice bath and boiling water.

It might not be possible to remove the RTD from the motor windings.

However, the type of RTD will be stated on the motor data sheet, which the original poster hasn't shared witht he forum.

Hi One & All,

I work for several years with motor winding that had RTD in the windings and once they go bad they can don't be replace except when the winging is replaced. The only hope is that a wiring for the RTD connection is broken before it reaches the motor winding?

EN

Use your RTD calibrator thingy...of course it's not much use if you don't know the type of RTD your checking..

Noor,

I agree totally with the guys and you can also do this easy measurements with your multimeter in order to know if there any problem with the RTD

Of course this apply if the RTD is 3 wire

I hope this help

JP

What temperature does the possibly faulty RTD indicate?

(The lack of valid information on this is just astonishing.)

For what reason do you have a doubt?

Hi,

I agree with JRaef an RTD will either works or does not.

But, I had RTDs not showing the correct temperature value and after some troubleshooting I have found some corroded terminals,false contact or moisture in the connections all of these factors will put additional resistance in the circuit therefore we will get the incorrect temperature indication.

Thanks