How a pointer multimeter measures ceramic capacitors

First discharge the capacitor (short circuit two pins), if the pointer meter has a capacitance gear, put the knob in the appropriate gear (your capacitance 223 indicates that the capacitance is to measure its capacity;

If the pointer meter does not have a capacitance file, and the multimeter is placed in the highest gear of the resistance gear (for example, 10k gear or 100k gear, such a small capacity, you can't see the change below 1k gear), after the capacitor is discharged, the pointer will swing an angle to the right (when you take the watch pen, you should look at the dial, but not the watch pen, because the charging time is very short), and then the pointer returns to the original position (the swing is because of charging the capacitor, and the resistance value is infinite after full charge) indicates that the capacitor is good, If the pointer does not return to its original position, it means that the capacitor has leaked and is broken. However, this method cannot measure the capacitance, but can only determine whether the capacitance is good or bad.

The 2KV 223 ceramic capacitor should not be measured with an analog multimeter, and the capacitance is too small. Optionally, a multimeter with the function of measuring capacitance capacity can be used for testing. Generally, the resistance level of the analog multimeter can only be used to judge the quality of the larger electrolytic capacitor, but the capacitance cannot be directly measured.

Do you want to measure capacity or voltage? The universal meter capacity value can be measured, but it is not very accurate. If you want to use a universal meter to measure the voltage, a universal meter is not a universal meter.

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

1. The capacitance has electrodeless capacitance and electrodeless capacitance, and the electric fan uses electrodeless capacitance, which is a capacitor that does not divide polarity. A polarized capacitor is a capacitor with +, - signs. Also called electrolytic capacitor.

2. Capacitors have the function of storing electricity and discharging. If there is no such reaction, the capacitor has failed, broken down or broken circuit;

3. Turn the multimeter to the resistance level, because the smaller the resistance, the greater the external power supply, and the multimeter is no exception. So choose the RX10 or RX1D file. Again, it is necessary to adjust the zero position;

4. After doing all this, touch the two pins of the capacitor with a red and black watch pen. Release the pen after a quick contact. Also note the maximum deflection of the pointer and note this value.

Because this is a charge to the capacitor, the capacitor stores power in its characteristics during charging, but releases it in an instant. We see that the pointer quickly returns to the right, that is, the capacitor has completed a charging process;

5. Then adjust the multimeter pen, or quickly contact the two feet of the capacitor. Then let go quickly. Similarly, the hands are quickly deflected and then returned. This is the charging process of the capacitor;

6. If the capacitor is able to complete the process of charging and discharging in this way, and after returning to the position, you do not change the meter pen and measure the two pins when the pointer does not move, then the capacitance is ***, no leakage. This is the test standard for capacitance;

PS: Do not touch the pins and multimeter pen with your fingers when measuring. Pay special attention to the +,- pole of the electrolytic capacitor.

1. First of all, prepare a multimeter, as shown in the figure below.

2. Secondly, short the capacitor, and then discharge the capacitor first, as shown in the figure below.

3. Next, insert the red connector of the multimeter into the CX file, as shown in the figure below.

4. Then, turn the dial to set the multimeter to 200 as shown in the figure below.

5. Subsequently, connect the red connector to the capacitor as shown in the figure below.

6. Finally, the reading of the meter changes, indicating that the capacitance is good, otherwise the capacitance will be damaged, as shown in the figure below.

The pointer multimeter detects the capacitor by using the charging principle of the capacitor. The method is: dial the multimeter transfer switch to the R 1000 gear of the resistance gear, and connect the meter pen to the capacitor, then the meter hand will swing left and right, the greater the swing, the greater the capacitance.

Sometimes it swings to near zero, and then slowly retreats to a certain position, and the amount of resistance at the stopping point is the leakage resistance of the capacitor. To judge the quality of the capacitance, it is to look at the magnitude of this resistance value, the larger the resistance value, the better, preferably infinite. If the meter pin does not move when the capacitor is connected, it means that the capacitor is disconnected.

If the capacitor is connected and the meter pin swings to zero and does not return, it means that the capacitor has broken down. When the capacitor is in the microfar, the multimeter transfer switch needs to be turned to the R 10k gear, and the above test is repeated. When the capacitor is smaller than the microfar, it is necessary to use another method of testing.

How do pointer multimeters and digital multimeters measure the quality of capacitance? Teach you the easiest way, simple and practical.

After you reverse the connection, the pointer only returns a little, which means that the electrolytic inverted phase leakage is large, and there is no problem in using it. Because it is connected in the forward direction in the circuit.

It is better to take off the capacitor and measure it, if it can be compared with a good capacitance of the capacitance and type of capacitor to be measured.

Method of measuring the capacitance of the analog multimeter: mechanically zeroing, adjust the watch hand to the left zero position, adjust the function knob to the ohm block of the multimeter, and select the appropriate range, estimate the resistance value to be resisted, so that the static position of the pointer after the measurement is roughly in the dial of the dial.

An analog multimeter is a multi-functional, multi-range measuring instrument. Generally, a multimeter can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level.

Some can also measure AC current, capacitance, inductance and some parameters of semiconductors. Some resistors must be shunted or stepped in parallel on the meter to measure the current, voltage, and resistance in the circuit.

Precautions for using a multimeter:

1. The measurement of current and voltage can not be selected in the wrong gear, if the electric block or current is mistakenly blocked to measure the voltage, it is very easy to burn the meter. When the multimeter is not in use, it is best to turn the gear to the highest AC voltage to avoid damage due to improper use.

2. When measuring DC voltage and DC current, pay attention to the +, - polarity, and do not connect the wrong one. If the hand is reversed, the watch rod should be replaced immediately to avoid damage to the hand and the dial head.

3. If you don't know the size of the voltage or current to be measured, you should use the highest gear first, and then choose the appropriate gear to test, so as to avoid excessive deflection of the watch hand and damage to the watch head. The closer the selected gear is to the measured value, the more accurate the measured value will be. <>

Digital multimeter detects capacitance:

1. Short connect both ends of the capacitor and discharge the capacitor to ensure the safety of the digital multimeter.

2. Turn the function pulse or back rotation switch to the capacitance (c) measurement file, and select the appropriate base starvation.

3. Tuanzhou inserts the capacitor into the C-X jack of the multimeter and reads out the numbers on the LCD display.

Quick Knowledge: The unit of capacitance: 1F=1000MF=1000UF