[Help] What happens if PT100 is used at over-temperature?

littleshrimp

[Help] What happens if PT100 is used at over-temperature? [Copy link]

For example, if an RTD with a temperature range of -50-200 degrees is set to 260 degrees, will the RTD be physically damaged or is it just out of the linear range?

dcexpert

If the limit parameters are not exceeded, it will generally not break, but the accuracy cannot be guaranteed.

littleshrimp

dcexpert posted on 2022-4-13 15:53 If the limit parameters are not exceeded, it will generally not break, but the accuracy cannot be guaranteed.

How should I read the limit parameters? I can't find this information online. I'm afraid it's a material problem. High temperature can cause physical damage to some materials.

chunyang

littleshrimp posted on 2022-4-13 16:58 How should I view the limit parameters? I can't find this information online. I'm afraid it's a material problem. High temperature can cause physical damage to some materials.

This is the case, and some materials will not be able to withstand it.

littleshrimp

chunyang posted on 2022-4-13 20:47 This is the case, some materials will not be able to withstand it.

If this is the case, I'd better buy a high-temperature RTD. I originally had the black body accessories I made last time, and I was going to equip a high-power heating plate for soldering PCBs. I looked at Taobao and found that most TRDs are 200 degrees. I thought that this thing does not require high temperature accuracy, and if high temperature only affects the accuracy, I'd just buy one for fun.

chunyang

littleshrimp posted on 2022-4-13 21:24 If this is the case, I'd better buy a high-temperature RTD. I originally had the black body accessories I got last time, and I was going to equip a high-power heating plate for soldering PCBs. I saw it on Taobao...

200 degrees is definitely not acceptable. The highest temperature of the soldering station may be around 300 degrees, which is a bit too much.

For soldering stations that rely on conduction heating, you can actually use the simple thermocouples that come with multimeters. They retail for one dollar each and can be directly attached to the surface of the heating station with high-temperature tape. Especially if there is no PT100 mounting hole, using a simple thermocouple is more flexible.

littleshrimp

chunyang published on 2022-4-19 15:42 200 degrees is definitely not acceptable. The highest temperature of the soldering station may be around 300 degrees, which is a bit too much. For soldering stations that rely on conduction heating, the...

Thermocouples are indeed more reliable. Due to the epidemic, the heating table I bought has not been delivered yet. I will get a thermocouple when the time comes.