@ole H wrote:
You will read something like 275 degrees centigrade.
Ole
Most front-circuits for thermocouples I have seen have the feature of detecting an open thermocouple. Usually a small amount of current is fed across the thermocouple, and since its dc impedance is rather low a small current will cause only minor output voltage error, If the thermocouple is open the impedance is inf., and the small current across the open thermocouple will cause a rather high input voltage. The signal conditioning circuitry will read a temperature which is out of reasonable range.
