RTDs vs thermocouples. If process temperatures are between −200 and 500 °C (−328.0 and 932.0 °F), an industrial RTD is the preferred option. Thermocouples have a range of −180 to 2,320 °C (−292.0 to 4,208.0 °F), so for temperatures above 500 °C (932 °F) they are the only contact temperature measurement device. Rtd Pt100 Circuit Diagram For a PT100 sensor, a 1 °C temperature change will cause a 0.384 ohm change in some of the Major manufactures web sites they will have wiring drawings. A platinum resistance temperature detector (RTD) is a device with a typical for a 100 Ω platinum RTD, commonly referred to as Pt100, is shown in Figure 2.
Resistance Temperature Detector (RTD)
By Terry Bartelt
Learners study animations to see the connection between temperature and resistance as they examine the operation of an RTD. A table is used to convert resistance readings to the corresponding temperatures. A brief quiz completes the activity.
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How to add thermocouple?
Hi,
My PFXLM4301TADAC should arrive soon, I'm using it to learn PLC.
I would like to get a temperature input to the PLC, what do I buy or can I just use something I have already from my electronics gear, I have a few DMM temperature probes, would they be OK, if so, how would I wire it (in the manual I can see pin C8-11 & D8-11 are temperature inputs with the signal names MS0+/EX0+/MS1+/EX1+ and MS0-/EX0-/MS1-/EX1- I've no idea what it means)?
Thanks.
Richard