判断贴片电容好坏是采购电容的必备技能，电解电容厂家总结出两种不同的判断方法，一是观察外观、尺寸及颜色，二是用数字电桥来检测。

　　Judging the quality of chip capacitors is a necessary skill for purchasing capacitors. Electrolytic capacitor manufacturers have summed up two different judgment methods, one is to observe the appearance, size and color, and the other is to use digital bridge to detect.

　　第一：观察

　　First: observation

　　如果是一个质量合格的贴片电容的话，那么外观尺寸应该是和外面标注的尺寸或者说明书上面以及外包装上面标注的尺寸是一致的，但如果你手头拿到一个贴片电容，我发现这个外观尺寸好像有些改变，比如说有轻微的瑕疵或者轻微的裂痕，那这个外观的尺寸就可能会有一些问题了，那间接的有可能说明这个电容出现一些问题。

　　If it is a chip capacitor with qualified quality, the appearance size should be consistent with the size marked on the outside or the size on the instruction manual and on the outer package. However, if you have a chip capacitor in hand, I find that the appearance size seems to have some changes, such as slight defects or slight cracks, then the appearance size is OK There will be some problems, which may indirectly indicate that there are some problems with this capacitor.

　　其次看锡脚，锡脚如有黑点、缺陷、裂纹、锡脚包边上下比例不协调等不良说明所以这样的好坏通过肉眼去看就可以大致的判断出来。

　　Secondly, look at the tin feet. If there are black spots, defects, cracks, and uncoordinated proportion of the top and bottom of the tin feet, the quality can be roughly judged by naked eyes.

　　还可以看颜色，如果是正常出厂的正常的电容的话，那么外观颜色是均匀的，同一批次不会出现发黑和发灰等色差现象，但如果当你拿到一款贴片电容的时候，肉眼观察发现这个外面的颜色就已经发黑了，甚至像烟熏的那种颜色，那可能就说明这个电容出现了一些问题了，而且这种电容在安装的时候是不能够安装上去的，应该进行检测，如果检测不合格，那就说明电容有问题。

　　You can also see the color. If it is a normal factory capacitor, then the appearance color is uniform, and there will be no color difference such as blackening and graying in the same batch. But if you get a chip capacitor, the naked eye observation finds that the color on the outside has been blackened, even like the color of smoke, it may indicate that the capacitor has some color The problem is, and this kind of capacitor can not be installed in the installation, should be tested, if the test is not qualified, it means that there is a problem with the capacitor.

　　第二：用数字电桥来进行检测

　　Second: use digital bridge to test

　　检测的过程很简单，就是直接把电桥调到相应的档位，然后用电桥夹具，将电容的两个锡脚全部都接通短路。然后这个时候来观察读数，稳定之后的读数，如果和这个电容的说明书上面的读数的电容值是保持一致的，或者是偏差非常的小在正常误差范围内，那说明这个电容应该是没有问题的。

　　The detection process is very simple, that is, directly adjust the bridge to the corresponding gear, and then use the bridge clamp to connect the two tin pins of the capacitor to short circuit. Then observe the reading at this time. After the reading is stable, if the capacitance value is consistent with the reading in the instruction manual of the capacitor, or the deviation is very small within the normal error range, it means that the capacitance should have no problem.