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How to distinguish the platinum-rhodium thermocouple is negative _ instrument

by:JVTIA     2020-10-29
There are three kinds of platinum-rhodium thermocouple, there S type thermocouple respectively, R type thermocouple, thermocouple type B. 1, with the hand touch, more hard is positive, soft is negative. 2, the positive than negative is slightly a little bit heavy. 3, use a multimeter to measure thermocouple millivolt values, display a positive number is corresponding to the multimeter plus or minus, and vice versa.
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