Therefore, from the current that can be measured, it can be roughly divided into three categories, namely AC (alternating current), AC/DC (alternating/direct current) and DC (direct current). However, many clamp meters on the market now have the function of measuring AC/DC. But having said that, don't be careless when buying. For example, GVDA's GD112A and GD112B seem to be unable to measure DC current, while GD122C can measure DC current and AC current. As for why some can pass the test, some can only measure one Only, it is related to the different principles used inside the device, so I won't explain it here.
After talking about the general classification, let's talk about the current range of the clamp meter. Many clamp meters on the market now have a range of about 200A-1000A, and the upper limit can reach 2000-2500A. At the same time, the current measured by different measuring instruments may be different. One is of course the error caused by the accuracy of the clamp meter itself, and the other may be due to the different calculation methods of the current.
According to different calculation methods, the current measured by some clamp meters is "true RMS", while others are "average". As a clamp meter, a clamp meter that can measure true RMS is a great plus point, and it is also a great plus money item... For example, Ulead's clamp meter is usually not very expensive, basically The price is like three or four hundred, but once it is a clamp meter that can measure the true RMS, the price can rise to more than 1000, and you can feel it.
