How to measure the insulation resistance of thermocouple thermal resistors
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Do both thermal resistors and thermocouples require insulation resistance measurement to determine their quality? How is it measured exactly? I’d appreciate it if an expert could explain it. Thank you!
To simply determine whether a thermal resistor or thermocouple is in good condition, it is not necessary to measure its insulation resistance. However, if there is suspicion that its insulation properties are poor during use, an insulation resistance meter can be used to measure the resistance between it and an insulator. Connect one end of the thermal resistor or thermocouple to one terminal of the insulation resistance meter, and connect the other terminal to the insulator; then proceed with the measurement according to the instructions provided for using the insulation resistance meter. Personal opinion, for reference only
Can a regular multimeter’s ohm meter be used to measure the resistance values between each of the three terminals and the casing? Also, can thermocouples be used in this way to measure insulation resistance?
The multimeter shows a low voltage; it cannot be used to measure insulation resistance, but its resistance value can still be roughly determined； The method for measuring insulation resistance using a thermocouple is the same as that for a thermal resistor.