The pointer multimeter can only measure the resistance, voltage and current, so what is not done

To be precise, isn't it, DC voltage block, AC voltage block, DC current block, electric block, can't be measured? The watch hand doesn't move when all the gears are measured, right? If you encounter this kind of fault, first check the 9V battery and battery inside the pointer meter, the resistance is to work with the internal battery, DC voltage block, DC current block, AC voltage block, do not work with the internal battery, check the battery, DC voltage block, AC voltage block, DC current block, resistance or can't make it, it is necessary to check the input fuse, it may be due to the use of errors or improper use, such as using the current block to measure the voltage, using the DC voltage block to measure the AC voltage, the input fuse is burned off, Causing no current input fault, all gears cannot be used, as long as the multimeter input fuse is blown out, it will cause no current input fault, and all gears are unusable.

The maintenance method is very simple, disassemble the pointer meter, measure the fuse tube to see if the fuse tube is burned, if the measurement is burned out, replace a fuse tube of the same model can be repaired, MF-47 pointer multimeter fuse tube specification is 250V to replace the repair fault.

Accessing the pointer meter is really simple, you should measure the DC voltage level first. Looking at it from the two pen terminals (measurement): its resistance in the DC gear is multiplied by the corresponding magnification = the resistance value that should be measured!

For example, if the internal resistance is 20,000 ohms (the dial says internal resistance), then the DC 10V gear should be 1M....If the measured resistance value is not correct, or it does not work at all, then look inside along the watch pen, either the wire is broken or a certain resistance is burned.

The internal resistance of the resistance gear = the value of the center group of the dial multiplied by the magnification.

Since the resistance can be measured, it means that the meter head is good, and the main thing is to check whether the current and voltage blocks are broken.

Tools: Resistors, Multimeters.

The steps are as follows: 1. Connect the meter pen, open the multimeter, insert the red meter pen into the V file, and insert the black meter pen into the Bochang com end to ensure the normal operation of the multimeter;

2. Rotate the multimeter gear, the resistance level needs to be used to measure the resistance, which can be rotated to the estimated gear, such as 200 gears;

3. Then connect the two sections of the resistor, because of the positive and negative points, so the pen can be connected casually, but please be sure to ensure that the contact is good;

4. Then read out the data displayed by the multimeter, if there is no data in the multimeter, it may be that the resistor is broken, and there is a possibility that the range is not enough, replace the range;

5. Increase the range, if there is no data, it can only mean that the resistor is broken, if there is data to read out the data, pay attention to the unit of the gear.

When the battery voltage is insufficient, the contact between the lifting cluster or the zeroing positioner is not good, or the dust is damaged, or the contact resistance of the gear switch is large, it will not be able to be zeroed, and the battery needs to be replaced or the potentiometer needs to be replaced. It was caused by the internal resistance burning out of the cherry blossom and had to be repaired. Some are caused by the poor quality of the multimeter, and the multimeter can only be replaced.

The method of measuring resistance with an analog multimeter is as follows:

1. If you don't know what the resistance value is, first dial the meter to the measurement resistance rxk file to test it once to see how big the resistance value is.

2. The watch hand is below the full degree of the dial 1, which means that the measurement resistance value is too large, and the RX100 gear should be selected for measurement.

3. The gauge hand is on the resistance scale 500, close to infinity, indicating that the resistance value is relatively large, and RX10K should be selected for measurement.

4. When the test is below the scale mark 1, it means that the selection of the measurement resistance value is too large. The measurement gear with a small resistance should be replaced.

How to measure the resistance of the multimeter, in fact, there are errors.

Summary. Dear, hello, I'm honored to have you with this question, the multimeter itself is composed of a DC voltmeter head and an additional circuit, with the additional circuit to expand other functions and ranges. There is a rectifier in the AC voltage range, which can convert the AC voltage into DC voltage, so it can be measured, and the DC voltage range does not have a rectifier and cannot directly measure the AC voltage.

What happens when the pointer multimeter can't measure the AC voltage?

Dear, hello, I'm honored to have you with this question, the multimeter itself is composed of a DC voltmeter head and an additional circuit, with the additional circuit to expand other functions and ranges. There is a rectifier in the AC voltage range, which can convert the AC voltage into DC voltage, so it can be measured, and the DC voltage range does not have a rectifier and cannot directly measure the AC voltage.

You can also take a look at this method 1, select the appropriate AC voltage level, 2, make sure the probe is intact and not open, 3, plug the probe into the correct socket. In addition, it should be noted that the frequency response of the pointer meter is generally only up to 1kHz, and alternating current above this frequency cannot be measured. Thank you very much for your support and have a great day.

Hello dear, if the resistance meter needle of the pointer multimeter can not be adjusted to zero, or the measurement of other data is not accurate, you can try the following steps:1Check the battery:

Make sure the battery is fully charged, and check that the battery polarity is correct. 2.Check the measuring line:

1) Check whether the measuring wire is in good contact, if it is loose or damaged, it can be replaced or repaired. (2) Check whether the measurement line has an open circuit or short circuit, which can be solved by measuring the resistance value of the measurement line with a multimeter. 3.

Adjust the range: (1) Confirm that you are using the correct range. (2) Use the knob to adjust the appropriate range to ensure that the resistance value to be measured is within the range.

4.Remove magnetic Xiao seepage field interference: (1) Place the pointer multimeter away from the electromagnetic field, and the magnetic field near the equipment such as electrical equipment and motors can affect the pointer reading of the pointer multimeter.

2) Use a magnetic shield and put the pointer multimeter into the shield to prevent magnetic field interference. 5.Check the pointer:

1) Check whether the pointer is damaged, such as bending or falling off, etc., and should be replaced or repaired. (2) Use a special tool to adjust the pointer to the zero position to ensure that the pointer is accurate.

If the pointer cannot be adjusted to zero, it may be due to wear, damage or aging of the needle. If this happens, then the pointer needs to be replaced, or readjusted so that it can be adjusted to zero. In addition, it is possible that the pointer cannot be adjusted to zero because the pointer position is too far from the origin, so you can readjust the position of the pointer and then try to adjust it to zero.

Before adjusting the pointer, it is necessary to do a confirmation operation and measure two known reference values with the confirmation tool to determine the position of the origin. After that, the position of the watch hand is readjusted according to the steps in the manual, so as to ensure that the hand can be adjusted to the zero position.

Hello, pro answer: it is indeed possible, because the return limb is simply a broken bide, the current pointer will not move, and when measuring the resistance, the voltage may be hungry for a short circuit, so that the bipolaride will be subjected to excessive current, which will make the bipolar leakage pants bad. Therefore, at this time, you should check whether the multimeter is connected, check if the bipolar is broken, if so, you will need to replace the new bipolar to solve the problem.