Learn to use a multimeter to measure resistance

1。The multimeter hits the electrical block. The gear indicates the maximum resistance that can be measured, which is the range of the range.

2.Basically, there are no precautions, that is, if the power-off measurement is guaranteed in the circuit, and then the value of the resistance is estimated, the selected range should not be too large, which will affect the measurement accuracy.

3.Note that the resistor is different from the other stoppers, and the dial is the opposite of the others. That is, the right side is 0, and the left end is the maximum.

4.This doesn't make much sense.

Please refer to the following information.

Connect the multimeter pen, the red pen should be placed in the ohm, and the black pen should be plugged into the com port. Rotate the multimeter's gear, and if you need to measure the resistance, you need to adjust it to the resistance setting. Connect both ends of the resistor and the display will show the data.

1. Select the range of the multimeter in the resistance area, and give priority to the larger range, which can play a protective role;

2. The red pen of the multimeter is inserted into the jack with the resistance symbol, and the black pen is inserted into the jack with the word com;

3. In order to accurately measure the resistance value of the electrical appliance under test, the internal resistance value of the electric instrument under test must be measured first, and the red and black pen are touched together, and the value read from the multimeter is the internal resistance of the multimeter itself;

4. Connect the multimeter pen with the measured element, and then adjust the gear to the normal range, without knowing the resistance of the measured electrical appliance, it can be measured from a large range to a small range, if the value displayed by the large range is, it means that the gear is larger, and the gear can continue to be adjusted to measure the resistance;

5. The normal value displayed on the multimeter is the sum of the resistance of the component or line under test and the multimeter itself, and the resistance of the measured element is obtained by subtracting the internal resistance of the multimeter from this value.

<>2. Find the resistance area, see that there are 200 ohms to 2m ohms, select the gear according to the size of the resistance value when measuring, if you don't know the size of the resistance value from large to small, short the red and black watch pen before testing, calibration.

3. If you want to measure the resistance of 0-2k ohms, adjust the gear to 2k ohms.

4. For example, the resistance value on the test board is listed, first hit the gear in the resistance area, and then connect the meter pen to both ends of the resistance.

5. It is best to remove the resistance and measure.

6. The resistance value of the last reading can be done.

How to use the multimeter:

1) Before using the multimeter, "mechanical zeroing" should be carried out, that is, when there is no measured electricity, the multimeter pointer should be pointed at the position of zero voltage or zero current.

2) In the process of using the multimeter, do not touch the metal part of the meter pen with your hands, so that on the one hand, you can ensure the accuracy of the measurement, and on the other hand, you can also ensure personal safety.

3) When measuring a certain amount of electricity, it is not possible to shift gears at the same time as the measurement, especially when measuring high voltage or high current, more attention should be paid to it. Otherwise, the multimeter will be destroyed. If you need to change gears, you should disconnect the watch pen first, and then go to measure after changing gears.

4) When the multimeter is in use, it must be placed horizontally to avoid errors. At the same time, care should be taken to avoid the influence of external magnetic fields on the multimeter.

5) After the multimeter is used, the transfer switch should be placed in the maximum gear of AC voltage. If it is not used for a long time, the battery inside the multimeter should also be taken out to avoid the battery from corroding other devices in the meter.

Summary. We will be happy to answer your <>

Compared with analog multimeters, the measurement resistance of digital multimeters has the following characteristics:1Digital display:

The digital multimeter can directly display the resistance value, which is more accurate and easy to read. 2.Auto-ranging:

The digital multimeter can automatically adjust the range according to the size of the resistance to be measured, making the measurement more convenient. 3.Auto-Calibration:

The digital multimeter can be automatically calibrated, reducing the error of manual operation. 4.Auto Power Off:

The digital multimeter can automatically shut down, saving battery power. 5.Smaller volume:

Compared with analog multimeters, digital multimeters are smaller in size and more convenient to carry and use.

Features of the digital multimeter to measure the resistance.

We will be happy to answer your <>

Compared with analog multimeters, the measurement resistance of digital multimeters has the following characteristics:1Digital display:

The digital multimeter can directly display the resistance value, which is more accurate and easy to read. 2.Auto-ranging:

The digital 10,000-fight meter can automatically adjust the range according to the size of the resistance to be measured, making the measurement more convenient. 3.Auto-Calibration:

The digital multimeter can be calibrated from the silver sail, which reduces the error of manual operation. 4.Auto Power Off:

The digital multimeter can automatically shut down, saving battery power. 5.Smaller volume:

Compared with analog multimeters, digital multimeter hail is smaller and more convenient to carry and use.

Why is the voltage at the end of the battery different when the load size changes.

When the load size changes, the terminal voltage of the battery changes, mainly due to the internal resistance and electrochemical reaction of the battery. When the load is increased, the battery needs to provide more shed lifting current, which will lead to the intensification of the electrochemical reaction inside the battery, and will increase the resistance inside the battery, thereby reducing the output voltage of the battery. Conversely, when the sequestrian load is reduced, the current that the battery needs to supply is reduced, the electrochemical reaction is weakened, the internal resistance is reduced, and the output voltage of the battery is increased.