How to use multimeter?

Rectifier with a multimeter can measure AC and DC current, voltage and resistance, and other electrical parameters of the magnetic-electric instruments. Today, I will tell you the use of electrical testing tools, special multimeter.

1. You should be familiar with the functions of multimeter before using it, according to the object to be measured, correct selection of stalls, range and lead jack.

2. When the measured data size is unknown, first you should range switch, placed in maximum, and then switched to the large range of small-scale file at the meter pointer to at least 1/2 of the full scale.

3. Resistance measurements, in selecting an appropriate gear ratio, the two will collide lead the pointer refers to zero, such as pointer from zero position, adjust the "zero" knob so that the pointer to zero, in order to ensure accurate measurement results . If you can not zero or DRO emit low voltage alarm, should be checked.

4. When measuring the resistance of a circuit, you must cut off the power supply circuit under test, measurement can not be charged.

5. Using a multimeter measurement, pay attention to the safety of persons and instrumentation equipment, the test can not hand the metal part of the touch pen, switch gear switch does not allow charging to ensure accurate measurement to avoid electric shock and burning instruments and other accidents .