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① Use a multimeter to develop a good habit, that is, before each measurement to see if the gear is placed correctly. With such a habit, the probability of burning the table will be greatly reduced.

② Select the range should try to make the pointer indicate near the 2/3 of the full scale, and the reading is more accurate. If you don't know the size of the measured voltage and current, you should select a large range block, and then readjust the range according to the reading size to make the reading accurate.

③ When measuring resistance, it is necessary to reset the zero after changing the range block so that the reading can be accurate. If it is not adjusted to zero, it means that the battery voltage in the table is insufficient and the battery should be replaced.

④ When measuring the resistance online, the power supply should be cut off for operation. Attention should also be paid to whether there are other components forming a parallel circuit with the measured resistance. If necessary, one end of the resistance can be welded from the circuit and then measured. For circuits with electrolytic capacitors, measure the capacitor after it is powered up.

⑤ When using the multimeter, you should form the habit of not touching the metal part of the pen to prevent electric shock. At the same time, if the hand touches the metal part of the stylus when measuring the resistance, it will affect the reading.

So in daily work, many people will have some wrong methods when using multimeters. Here is an inventory for everyone. Have you done the same?
1. Replace the fuse of the original multimeter with a cheap fuse. If your digital multimeter (DMM) meets its identified electrical safety standards, then the fuse should be a fuse with special safety, which can be quickly disconnected before a serious overload occurs to ensure the safety of the instrument and personnel. When you need to replace the fuse of the digital multimeter, be sure to use a fuse that meets safety regulations and is allowed to be used.

2. Use a piece of wire or metal sheet to replace the multimeter fuse. This may seem like a quick fix when you can't find a spare fuse on hand, but such fuses can pose serious security problems.