Common faults of wear-resistant thermocouples

The wear-resistant thermocouple adopts plasma spraying technology, wear-resistant protection tubes made of different materials of high-chromium cast iron and high-temperature alloy. It is specially designed and manufactured for measurement scenarios of high, medium and low temperature wear-resistant environments. In industrial sites such as chemical beds, boiling furnaces, pulverized coal furnaces, ball mill cement plants, etc., armored or high-temperature armored cores are used, with wear-resistant casings of different materials and specifications, with good vibration resistance, wear resistance, and thermal shock resistance. , The service life of the product in harsh occasions with various degrees of wear can be several times higher than that of ordinary products, reducing consumption costs. What are the common failures of wear-resistant thermocouples? 1. The compensation wire of the wear-resistant thermocouple is connected in reverse. This is mainly a wiring problem, caused by the temporary negligence of wiring personnel, and is a human factor. When the compensating leads of the thermocouple are connected in reverse, the operator console display is usually larger or smaller than the actual value (varies by channel measurement circuit). 2. The insulation layer of the compensation wire of the wear-resistant thermocouple is cut, and the signal circuit is grounded. This is mainly because the compensation wire is very hard, and it is not set flat in the terminal box, so the terminal box cover is twisted many times during fault handling and contacts with the compensation wire. Such a fault is reflected on the operator control station, and the temperature display value is normal. very small. 3. The wiring terminals in the terminal box are in poor contact. Compensation wires and thermocouple wires are very hard, and it is difficult to fasten the wiring during field inspection. Sometimes the wires are tightened, but after a period of time, they will loosen as the wires are deformed. Such failures are reflected in the temperature display on the operator console being no display or out of range. 4. Wear-resistant thermocouple compensation resistance failure. This kind of failure indicates that the temperature display value gradually rises or falls after the thermocouple is connected.

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