Thermocouple assembly problems? How to handle? Release date: 2019 05 - 05 viewed: zero

In everyday use, thermocouple assembly problems, need to how to deal with address? Prefabricated thermocouple used widely, but some problems in use failure is inevitable, we are committed to the maintenance of thermocouple assembly, should also know that some of the common troubleshooting methods, in the following by the problem of huashi introduce thermocouple assembly or fault handling methods. One, the thermoelectric potential is greater than the actual potential possible reasons: compensation line with thermocouple type does not match; Insert depth or inadequate installation position is not correct; Hot electrode are destroyed; Jamming signals enter; The thermocouple reference end temperature is higher. Solution: replace the same model to compensate the line; Change the installation location or insert depth; Replace thermocouple; Check the interference sources and eliminate its; Adjust the reference end temperature or correction. Second, the thermoelectric potential is less than the actual value possible reasons: short circuit; The short circuit between thermocouple connector terminal; Insulation burnout compensation wire short circuit; Compensation line with thermocouple does not match; And thermocouple compensation wire polarity connection; Insertion depth is insufficient, installation position is not correct; Thermocouple cold junction temperature is too high. After processing method: check if caused by moisture, can be dry, if for ceramic pipe insulation fault, should be replaced; Open the terminal block, wiring scrub brush clean; Isolation short-circuit or replace a new compensation line; Will the replacement for the same type of compensation wire; The right to reconnect; Solution: change the installation location and insert depth of thermocouple wire was replaced by the compensation wire, keep it away from high temperature. Three, instrumentation instructions is not stable, sometimes not, when the reasons of the high and low may: contact thermoelectric pole on the terminal is not bad; The thermoelectric puppet has intermittent short circuit or intermittent grounding phenomenon; Hot electrode have been destroyed or disconnected, thermocouple is not installed, oscillation, compensation wire grounding or intermittent short circuit phenomenon. Solution: to reconnect; From the hot electrode of thermocouple protection tube, identify fault point and eliminate the fault point; Replace the new electrode; Solid installation; Identify fault point and to eliminate it.