The thermocouple output fault judgment method Shanghai dragon instrument electric appliance co. , LTD

In accordance with the instrument wiring diagram to stop precise wiring after electrify, instrument first appeared the thermocouple indexing number, scope, then appeared full scale appeared again measuring instrument discharge of digital tube set temperature, appeared on the instrument digital tube measurement temperature. If appeared on the instrument digital tube not the temperature of the heating element, and display & quot; 在“ ,“; 0000' Or & quot; 000' Output such as state, explain the instrument parts fault, should be done as follows. The thermocouple from the meter thermocouple output to be removed, then the instrument with any wire thermocouple output short circuit. Appeared on the electricity, instrument digital tube value approximately at room temperature, explain thermocouple external connection open, should be a change in the same type thermocouple. If still more than state, explain the instrument in the transport process, the output of the instrument is destroyed, to exchange the instrument. The above problems the thermocouple down, next to switch to a functioning the same degree, access to the instrument of thermocouple, after electrify, the original problem appeared on the instrument digital tube heating element temperature, explain thermocouple external connection open circuit, a change in the same type thermocouple. If still more than state, explain the instrument in the transport process, the output of the instrument is destroyed, to a change in appearance. There was something wrong with the thermocouple of detached from the meter, multimeter on measuring ohms ( R） 1, use multimeter two table stick to measuring thermocouple at both ends, if the multimeter appeared on the resistance value is large, explain the thermocouple external connection open, a change in the same type thermocouple. Or have a certain value, explain the instrument output has a problem, should be a change in the instrument.