Four kinds of common faults and solve thermal resistor

Thermal resistance is more common temperature detector, not only is widely used in industrial measurement, also be made into standard benchmark thermometer for use, below small make up to introduce four kinds of common faults and solve thermal resistor.

a, failure of the main performance: heat resistance showed to the indicated value is lower than the actual value or values appear unstable phenomenon; The cause of the failure: the protection of the thermal resistance tube metal debris and dust, dirt, the connections between or heat resistance short-circuit phenomenon; Settlement way: remove metal scraps, dust and water clean, find the location of the thermal resistance in short circuit, strengthen its insulation. Second, the failure of main performance: heat resistance indicator appears is infinite; The cause of the failure: heat resistance or lead wire short circuit, but it is possible that the wiring terminal loose occur; Settlement way: change the resistor body directly, or will be welding wire drawing and tighten. The main performance of the three, failure: shown on the display instrument of thermal resistance value is negative; The cause of the failure: shows the connection between the instrument and heat resistance of errors, or heat resistance short-circuit phenomenon; Settlement way: the wiring connection again, or find the correct short circuit position, strengthen its insulation. The main performance of the four, fault: the relationship between the thermal resistance value and temperature changed; The cause of the failure: heat resistance wire appeared corrosion or deterioration; Settlement way: will heat resistance to change.