ow to Find Problems with a Multimeter
The multimeter checks electrical faults, generally only use two gears, one is the voltage gear (including the AC and DC voltage gears) and the other is the ohm.
If the device does not work, the first thing you think about is whether the voltage of the device is normal, you need to use the voltage range of the multimeter (choose the AC voltage range or the DC voltage range, depending on whether your device is an AC device or a DC device) to measure. If the control loop or secondary loop is disconnected, if you are familiar with the schematic diagram, you have to use the voltage gear to measure whether the voltage at a certain place is normal. , it means that there is a disconnection or poor contact there. In order to be more sure whether there is a problem there, you have to disconnect the power supply of the device at this time, and there is an ohm file of a multimeter to determine whether there is a disconnection there, so as to troubleshoot the problem. Generally speaking, it mainly depends on your familiarity with the equipment and the accumulation of work experience.
