How to use a multimeter

How to use a multimeter: Select the range: Select the appropriate range according to the measured value. Connect the test wires: the red wire is connected to "VΩmA" and the black wire is connected to "COM". Zero adjustment: Adjust the multimeter to the resistance level, short-circuit the two wires and then adjust the zero. Measure voltage: select the voltage range, connect the test lead, and read the pointer or digital display. Measure current: Select the current level, connect it in series in the circuit, and read the pointer or digital display. Measure resistance: select the resistance level, connect the test lead, and read the pointer or digital display.

The correct way to use a multimeter

Introduction to the multimeter
The multimeter is a Multifunctional electronic measuring instrument that can measure voltage, current, resistance and other electrical properties. It has the characteristics of multi-speed, multi-function and easy use. It is one of the necessary tools for electronic engineers and maintenance personnel.

Preparation before measurement

1. Select the appropriate range: Before measuring, first select the appropriate range based on the value to be measured to prevent damage to the instrument. Or burnt components.
2. Connect the test wires: Connect the red test wire to the "VΩmA" terminal of the multimeter and the black test wire to the "COM" terminal.
3. Zero adjustment: Put the multimeter in the resistance measurement position, short-circuit the two test wires, and adjust the "Ω" knob to make the pointer point to zero.

Measure the voltage

1. Put the multimeter to the voltage measurement position.
2. Select the appropriate DC or AC range.
3. Connect the red test lead to the positive pole of the point to be measured, and the black test lead to the negative pole.
4. Read the voltage value displayed by the multimeter pointer or digital display.

Measure current

1. Put the multimeter to the current measurement range and select the appropriate current range.
2. Connect the multimeter in series in the circuit (the black test lead is connected to the negative pole, and the red test lead is connected to the positive pole).
3. Read the current value displayed by the multimeter pointer or digital display.

Measure resistance

1. Put the multimeter to the resistance measurement range and select the appropriate resistance range.
2. Connect the two test leads to both ends of the resistor under test.
3. Read the resistance value displayed by the multimeter pointer or digital display.

Notes

• Check whether the battery is sufficient before measuring.
• Pay attention to safety when measuring high voltage to avoid electric shock.
• When measuring current, they should be connected in series in the circuit, never in parallel.
• When measuring resistance, the resistance to be measured must not be charged.

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