The thermocouple thermoelectric emfs growth over the course of measuring the temperature, the thermoelectric emfs and only the size of the thermocouple temperature difference on both ends of the conductor material and, had nothing to do with hot electrode length and diameter. By direct measurement or control in the production of a variety of 0 ℃ to 1800 ℃ within the scope of the liquid, steam and gas medium, as well as the temperature of the solid surface, simple assembly, easy to change, press reed temperature sensing element, ant-vibration performance is good, lost measurement range, high mechanical strength, good compression performance, widely used in electric power, thermal power, metallurgy, medicine, chemical industry, machinery manufacturing, etc.

1: thermocouple thermoelectric potential is smaller than the actual value. What should I do?

Analysis of reasons:

(1) the short circuit.

Short circuit between the terminal (2) the thermocouple junction box.

(3) compensation wire short circuit because of insulation burn out.

(4) the compensating conductor does not match with thermocouple.

(5) compensation conductor and thermocouple reverse polarity.

(6) insert depth and installation position is not right.

(7) thermocouple cold junction temperature is too high.

Processing method:

(1) the check if it is caused by moisture, drying; If the insulation fault of the porcelain tube, it should be replaced.

(2) open the box, the wire brush clean.

(3) the insulation or replace a new compensation conductor should be short circuit.

(4) the replacement of the same type into compensation conductor.

(5) reset properly.

(6) change the installation location and insertion depth.

(7) thermocouple wires for compensation wire, turn away the cold end of drier.

Thermocouple in the measuring instrument is not stable,, when high low. What should I do?

Analysis of reasons:

(1) thermal electrodes in poor contact terminal.

(2) the thermocouple with intermittent short circuit or intermittent grounding phenomenon.

(3) the hot electrode has been broken or seems broken off.

(4) thermocouple installation is solid, swing.

(5) the compensating conductor grounding or intermittent short circuit phenomenon.

Processing method:

(1) to pick up.

(2) the thermocouple thermal electrode from the protection tube, find out the fault point and eliminated.

(3) to replace the new electrode.

(4) installed firmly.

(5) find out the fault point and eliminated.

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