用數(shù)字萬用表測量電解電容好壞的方法有：用電容檔直接檢測、用電阻檔檢測和用電壓檔檢測。接下來小編給大家詳細(xì)介紹下測量的具體方法。
The methods of measuring electrolytic capacitance with digital multimeter include direct detection with capacitance, detection with resistance and detection with voltage. Next, I will give you a detailed introduction to the specific method of the side face.
1.用電容檔直接檢測
Use capacitor to detect directly
某些數(shù)字萬用表具有測量電容的功能，其量程分為2000p、20n、200n、2μ和20μ五檔。測量時(shí)可將已放電的電容兩引腳直接插入表板上的Cx插孔，選取適當(dāng)?shù)牧砍毯缶涂勺x取顯示數(shù)據(jù)。
Some digital multimeters have the function of measuring capacitance. Their ranges are 2000p, 20n, 200N, 2 μ and 20 μ. When measuring, the two pins of the discharged capacitor can be directly inserted into the CX jack on the meter board. After selecting the appropriate range, the display data can be read.
2.用電阻檔檢測
Check with resistance
實(shí)踐證明，利用數(shù)字萬用表也可觀察電容器的充電過程，這實(shí)際上是以離散的數(shù)字量反映充電電壓的變化情況。設(shè)數(shù)字萬用表的測量速率為n次/秒，則在觀察電容器的充電過程中，每秒鐘即可看到n個(gè)彼此獨(dú)立且依次增大的讀數(shù)。根據(jù)數(shù)字萬用表的這一顯示特點(diǎn)，可以檢測電容器的好壞和估測電容量的大小。
Practice has proved that the charging process of capacitor can also be observed by using digital multimeter, which actually reflects the change of charging voltage with discrete digital quantity. If the measuring rate of the digital multimeter is n times / s, n independent and increasing readings can be seen every second during the charging process of the capacitor. According to this display characteristic of digital multimeter, the quality of capacitor can be detected and the size of capacitance can be estimated.
3.用電壓檔檢測
Test with voltage level
用數(shù)字萬用表直流電壓檔檢測電容器，實(shí)際上是一種間接測量法，此法可測量220pF～1μF的小容量電容器，并且能精確測出電容器漏電流的大小。
In fact, it is an indirect measurement method to detect capacitors by DC voltage level of digital multimeter. This method can measure 220pF ~ 1 μ f small capacity capacitor and accurately measure the leakage current of capacitor.
用電容檔測量電容時(shí)，若顯示的讀數(shù)遠(yuǎn)小于標(biāo)稱值，說明該電解電容已損壞。對于鋁電解電容來說，若顯示的讀數(shù)遠(yuǎn)小于標(biāo)稱值，說明電容內(nèi)部電解質(zhì)已干涸，不能使用了。若測量擊穿損壞的電容，則萬用表顯示的讀數(shù)為“1”。對于漏電大的電容，用電容檔測量時(shí)，顯示的讀數(shù)會顯著高于其標(biāo)稱值。
When measuring the capacitance with a capacitor, if the displayed reading is far less than the nominal value, it indicates that the capacitor has been damaged. For aluminum electrolytic capacitor, if the displayed reading is far less than the nominal value, it means that the electrolyte inside the capacitor has dried up and can not be used. If the capacitance damaged by breakdown is measured, the reading of the multimeter is "1". For the capacitance with large leakage, the display reading will be significantly higher than its nominal value.