When you are not sure whether the LED drive power is broken or the LED light is broken, at this time, a universal multimeter can easily judge whether the LED drive power is good or bad for you.

First, a brief introduction to the basic functions of the multimeter:

The two lines are called the pen, the red pen is connected to the positive pole in the measurement, the black pen is connected to the negative pole or connected to the bottom line;

Measurement current: the multimeter is in series in the circuit, the red watch pen is connected to the positive pole of the power supply, the black watch pen is connected to the positive pole of the LED power supply；

Measuring resistance: two meters and pens on both ends of the resistance to be measured, partial direction；

Measurement of AC voltage: the universal meter is in parallel at both ends of the component under test, and the meter and pen are not divided into positive and negative；

Measure the DC voltage: the red meter pen is connected to the positive pole of the object to be measured, the black meter pen is connected to the negative pole of the object to be measured；

When the corresponding measurement must choose the gear position and range, otherwise it will burn out the multimeter.

LED drive power is usually DC;

(1) Switch the multimeter to DC, and the DC voltage is marked black.

(2) the two pens respectively contact the two polar terminals of the LED power supply, the red pen is connected to the positive pole, the black pen is connected to the negative pole, before using the equipment, please confirm whether the equipment can be used normally.

(3) When testing the 12V drive power supply, the data on the multimeter is 12V±0.75, indicating that the LED power supply can work normally.

Usually when people buy a multimeter, usually the product manual will tell you in more detail how to use the multimeter equipment.

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