1、 The thermoelectric potential is smaller than it should be (the instrument reading is lower)

Reason: 1. Internal electrode leakage (short circuit) of wear-resistant couple

2. Wear resistant coupling [3] Short circuit in the terminal block of the junction box

3. Wear resistant thermocouple or damaged measuring end

Repair method: 1. Remove the thermoelectric electrode and check for the cause of leakage. If it is caused by moisture, the thermoelectric electrode should be dried. If the insulation of the insulation tube is poor, it should be replaced.

2. Open the junction box and clean the terminal posts to eliminate the cause of the short circuit.

3. Cut off the deteriorated parts, re weld the measuring end or replace the temperature sensing element with a new one.

2、 The indicating instrument has no indication

Reason: Wear resistant thermocouple is broken

Repair method: 1. Remove the temperature sensing element. If there is an open circuit at the measuring end, re weld it.

If the circuit is broken due to deterioration, cut off the deteriorated part, re weld the measuring end or replace the temperature sensing element with a new one.

3、 The instrument reading is unstable (in cases where the instrument itself rarely malfunctions)

Reason: 1. Poor contact between temperature sensing components and compensation wires inside the junction box.

2. The thermoelectric electrode exhibits open and continuous short circuits, as well as intermittent grounding.

3. The wear-resistant couple vibrates due to poor installation.

Repair method: 1. Open the junction box, reconnect and tighten it.

2. Remove the temperature sensing element, identify the intermittent short circuit or grounding part, and eliminate it.

3. Install the wear-resistant couple firmly.