How to measure voltage with a multimeter! Kneel and beg the master!

First set the function gear to "voltage", if the AC is measured, there is a symbol under v, or AC; If it is a DC measurement, it should be adjusted to DC, or there is a - symbol under V. Then, adjust the "range", it is recommended to use a larger range first, if the measurement is smaller, change to a smaller range. Note that the meter pen is positive and negative when measuring DC, and the red one is positive; There is no positive or negative communication.

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Summary. Use a multimeter to measure the output voltage, hello dear<>

When measuring the output voltage of the tester, you first need to determine whether your appliance is using AC or DC. Before measuring the voltage, you need to estimate the voltage of the electrical appliance in what range. Like the battery, it is generally 12 volts, and the electric board on the mobile phone is generally volt.

Before the test, connect the red watch pen on the outside watch to the positive and black watch, connect the pen to the negative pole, and hit the gear position at 20 volts DC. Usually the reading will be out within 5 seconds!

Use a multimeter to measure the output voltage.

Use a multimeter to measure the output voltage, hello dear<>

When measuring the output voltage of the tester, you first need to determine whether your appliance is using AC or DC. Before measuring the voltage, you need to estimate the voltage of the electrical appliance in what range. Like the battery, it is generally 12 volts, and the electric board on the mobile phone is generally volt.

Before the test, connect the red watch pen on the outside watch to the positive and black watch, connect the pen to the negative pole, and hit the gear position at 20 volts DC. Usually the reading will be out within 5 seconds!

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In the measurement process of the digital multimeter, the measured signal is converted into a DC voltage signal by the conversion circuit, and then the analog-to-digital (AD) converter converts the voltage analog signal into a digital signal, and then counts by an electronic counter. Finally, the measurement results are displayed digitally directly on the display. The function of a multimeter to measure voltage, current and resistance is realized through a conversion circuit, while the measurement of current and resistance is based on the measurement voltage, that is to say, the digital multimeter is developed on the basis of the digital DC voltmeter.

The AD converter of the digital DC voltmeter converts the analog voltage that changes continuously with time into a digital value, and then counts the digital value by an electronic counter to obtain the measurement result, and then displays the measurement result by the decoding and elimination display circuit. The logic control circuit controls the coordination of the electrical circuit, and the whole measurement process is completed sequentially under the action of the clock.

Measurement of voltage, e.g. battery, Walkman power supply, etc.

First, insert the black probe into the "com" hole and the red probe into the "v". Select the knob to a range greater than the estimated value (Note: All values on the dial are the maximum range, "V-" indicates the DC voltage range, "V" indicates the AC voltage range, and "A" indicates the current range, then connect the probe to both ends of the power supply or battery.)

Stay in touch with a steady line. The value can be read directly from the display. If the display is "1", the measurement range is too small, and you need to increase the measurement range before measuring.

If " appears to the left of the value - it means that the polarity of the probe is opposite to the actual polarity of the power supply, and the red probe is connected to the negative pole.

2.Measurement of AC voltage.

The meter jack is the same as the measurement of the DC voltage, but the knob should be set in the range required by the AC position "V". There is no difference between positive and negative AC voltages, and the measurement method is the same as before. Whether you are measuring AC voltage or DC voltage, pay attention to personal safety and do not touch the metal part of the probe with your hands.

Note that when measuring alternating current, set the DMM at the AC voltage level and connect the probes to both ends of the circuit under test. The multimeter displays the measured voltage. If DC is being measured, set the DMM to the DC voltage range, connect the probes to both ends of the circuit under test, and the multimeter will display the measured voltage.

If the voltage is positive, the point to which the red probe is connected is high potential and the point to which the black probe is connected is low. If the voltage is negative, the point connected by the red probe is low potential and the point connected by the black probe is high potential.