Heat resistance in long under normal use of troubleshooting

Under normal circumstances the use of thermal resistance was relatively smooth, but individual special circumstances will fail, the more common fault is a short circuit and open circuit two kinds, among them the main reason for the trip because of heat resistance of the wire is too thin to result in, small make up the key is to introduce the thermal resistance in the event of a short circuit and open circuit when the solution.

in fact short circuit and open circuit is easy to distinguish, only need to use a multimeter is ok, use multimeter x 1 Ω file for short circuit and open circuit test, if the measured value is less than R0, then representative should be short, but if the measured value display to infinity, they have appeared on behalf of the phenomenon of open circuit, including a short word processing and the solution will be relatively simple, as long as does not affect the resistance wire thickness and length, there will be a short circuit position finding and blow dry it, then will strengthen the insulation is ok, but if is open circuit phenomenon, is the result of the treatment needs to change the original length of the wire, so are likely to affect the resistance value, under normal circumstances would choose in resistance to change, but also can choose welding way of repair, but need to check after welding before they can normal use. As shown in the display instrument of thermal resistance value is lower than the actual value or unstable situation, in many cases because of the interior of the protecting tube in the dirt, so just need to clean up the dirt is ok, but if the indicates the value is negative, it represents the thermal resistance or thermoelectric appear short circuit wiring mistakes, as long as the correct wiring can, after dealing with the phenomenon of short circuit, can return to normal use.