Note

1. Pay attention to the correct selection of range and red pen jack. When you measure an unknown quantity, you should first set the range to the maximum and then move from large to small until it is just right. If "1" is displayed, it means overcut, and the range should be increased.
2. When not measuring, the power supply should be turned off.
3. When changing the range, the marker should be disconnected from the measured point.
4. When measuring current, avoid overload.
5. Resistance and current levels are not allowed to measure voltage.