Precautions before using the Professional multimeter Digital
1. Before measuring, check whether the red and black test pens are connected correctly. The red test lead is connected to the red terminal or the jack marked with "+", and the black test lead is connected to the black terminal or the jack marked "-". The head part is damaged.
2. Before connecting the test leads to the circuit under test, be sure to check whether the selected gear is consistent with the measurement object. Otherwise, misuse of the gear and range will not only get the measurement results, but also damage the multimeter. Beginners are reminded that the damage of the multimeter is often caused by the above reasons.
3. When measuring, keep your fingers away from the metal parts of the test leads and the components under test.
4. If the measurement range needs to be changed, it must be carried out after the test lead leaves the circuit, otherwise the arc generated by the rotation of the selector switch will easily burn out the contacts of the selector switch, resulting in an accident of poor contact.
5. In actual measurement, it is often necessary to measure a variety of electric quantities. Before each measurement, pay attention to switching the selector switch to the corresponding gear and range according to each measurement task.
6. After the measurement is completed, the function switch should be placed in the maximum range of AC voltage.
