Who knows the values corresponding to thermocouples and thermal resistors at different temperatures?
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Who knows what the millivolts and resistance values corresponding to thermocouples and thermal resistors are at different temperatures? Sometimes, when the process indicates that the displayed value is inaccurate, it is necessary to verify whether the display of the thermocouple’s thermal resistance is correct; this requires checking whether the millivolt signals and resistance signals sent back correspond to the displayed value. I don’t know what these values are. Please, if anyone knows, could you give me some guidance? Thank you
No way, man! Are you in the instrumentation business? ? Don’t you even have a basic dial indicator? Search online; there are plenty of them~~~ Remember, it’s called a dial indicator~~
Pt100 temperature and resistance value chart Pt100 Pt100 Pt100 Temperature (°C) Resistance Value (Ω) 0 100 Temperature (°C) Resistance Value (Ω) -200 18.49 10 103.9 210 179.51 -190 22.8 20 107.79 220 183.17 -180 27.08 30 111.67 230 186.32 -170 31.32 40 115.54 240 190.45 -160 35.53 50 119.4 250 194.07 -150 39.71 60 123.24 260 197.69 -140 43.87 70 127.07 270 201.29 -130 48 80 130.89 280 204.88 -120 52.11 90 134.7 290 208.45 -110 56.19 100 138.5 300 212.02 -100 60.25 110 142.29 310 215.57 -90 64.3 120 146.06 320 219.12 -80 68.33 130 149.82 330 222.65 -70 72.33 140 153.58 340 226.17 -60 76.33 150 157.31 350 229.67 -50 80.31 160 161.04 360 233.17 -40 84.27 170 164.76 370 236.65 -30 88.22 180 168.46 380 240.13 -20 92.16 190 172.16 390 243.59 -10 96.09 200 175.84 400 247.04
Appendices in some books on instruments contain calibration tables for thermal resistors and thermocouples, which can be consulted easily.
2# ynhhcanye friend, you’re right – I’m not in the instrumentation field; I switched to this career by chance, essentially becoming a newcomer to this area, haha
That is, we learned about it in university when studying instrument automation; it’s something that can be found in the back of any book on instruments
The “Common Instrument Data Manual” is very comprehensive.
Received, thank you all! I will pay more attention to learning the basic knowledge in the future
The normal resistance value of a platinum 100 thermistor at zero degrees is 100 ohms; for every increase or decrease of 1 degree Celsius, the resistance changes by approximately 3.9 ohms. Using this as a standard, it is possible to determine whether its readings are normal. As for thermocouples, I’m not sure which type is being used; if it’s a K-type, one degree increase corresponds to an increase of 0.04 millivolts.
I have the electronic version here; do you want me to send it to you!