Determine thermal resistance of short circuit and open circuit

Under normal circumstances, the use of thermal resistance process is relatively smooth, but there is no failure occurs, do not represent common fault should be short circuit and open circuit, the circuit are encounter carefully due to the thermal resistance of silk, small make up is simple to introduce the short circuit and open circuit of thermal resistance of the solution.

open circuit and short circuit conditions are relatively easy to determine, only need to use a multimeter is ok, use the x 1 Ω from the multimeter to measure of thermal resistance, if the measured resistance is less than R0, it represents a short circuit. If the measured value is infinite, it is on behalf of the circuit. Of short circuit is relatively easy to solve, as long as does not affect the length of the thermal resistance wire and the thickness of the case, find and dry 'the position of the short circuit, and carries on the strengthening of the insulation is ok; But if is open circuit, when to deal with it, you need to wire resistance change in length, this will impact resistance, so normal is only to change the resistor body, but if use welding way of processing, to ensure that after welding, its efficacy fully qualified can be normal use. And, as shown on the display instrument of thermal resistance value, than the actual value is low or is not stable, may be protecting tube within the dirt, the need to protect the pipe to clean up. The value is negative, the instrument must be thermal resistance on the wiring error, or is the thermal resistance short-circuit, directly connect the connection again, and to deal with a short circuit.