In our lives, no matter what machinery is, there will be some failures, and the shielding box is no exception. If it is used for a long time, there will be some failures. Then how should we deal with it? The editor below introduces to everyone:
1. Elimination method The so-called elimination method is to determine the cause of the fault by plugging in some plug-in boards and components in the machine. When a plug-in board or device is removed and the meter returns to normal, it means that the fault has occurred there.
2. Substitution method Two instruments of the same model or sufficient spare parts are required. Replace a good spare part with the same component on the faulty machine to see if the fault is eliminated.
3. Comparison method Two sets of shielding boxes of the same model are required, and one set is in normal operation. To use this method, you must have the necessary equipment, such as a multimeter, an oscilloscope, and so on. According to the nature of comparison, there are voltage comparison, waveform comparison, static impedance comparison, output result comparison, current comparison, etc.
The specific method is: let the faulty shielding box and the normal shielding box operate under the same conditions, and then detect the signals at some points and compare the two sets of signals measured. If there are differences, you can conclude that the fault is here. This method requires maintenance personnel to have considerable knowledge and skills.