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I'm using a thermocouple for the input, but "b.out" appears on the PV display. What should I check first?

I'm using a thermocouple for the input, but "b.out" appears on the PV display. What should I check first?

“b.out” on the PV display indicates a break in the input. Check whether the signal from the sensor is getting through. Also, to narrow down the cause, you can short the input terminal of the UT itself, then if the UT's input is normal the temperature of the current operating environment should appear.

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