Easy to overlook the following two points when using thermocouple

We often when using thermocouple will ignore the many details, such as multi-point explosion-proof thermocouple, the decision of the details of part of its focus on its entire measurement precision. Actually platinum-rhodium thermocouple is a common measuring temperature parts, because of its antioxidant and thermoelectric performance is very good, we at the end of the use of the thermocouple, can be have special personnel to check, but even so there will be carefully the details of the individual are easy to be ignored.

the first is the thermocouple wire, wire for platinum rhodium thermocouple pair of clean degree determines the accuracy of the measurement, if accidentally silk by the outside world after pollution, such as black or appear oxidation, so the measurement accuracy is lower, and the whole of the double wire length, actually in the thermocouple calibration regulations, accidentally wire length is not short in a certain range, if accidentally of thermocouple wire length is not long enough, you will and measuring device contact too close, so will cause measurement error is bigger. Followed by accidentally wire bending, actually platinum rhodium thermocouple wire pair is not only fine is relatively soft, so prone to all kinds of bending, if use wire bent of thermocouple accidentally to measure, the structure of measured error is for sure.