I want to buy a multimeter, which is more accurate?
For electrician's friends, it is essential for multimeter to be convenient and practical. Many friends think that accuracy is more important when choosing a multimeter, and even ask the multimeter to have an accuracy of several thousandths. In fact, I think accuracy is really not as important as you think for ordinary maintenance work, except for the maintenance of some precision circuit boards.
For example, measuring the voltage of a motor, the voltages of 380V and 383V have no effect on judging the line fault. Multimeters are not cutting-edge technology, and the errors of different brands of multimeters are not much different. I think it is more important than accuracy that the quality is excellent, resistant to operation and not easy to break down.
Multimeters are mainly divided into pointer meters and digital meters.
The input impedance of pointer multimeter is low and its accuracy is low, but it has strong anti-interference ability and can intuitively reflect the size change.
Digital multimeter has high input impedance, high accuracy, intuitive reading and rich functions, such as measuring voltage, current, temperature and capacitance. Because the digital meter adopts instantaneous sampling, it is easy to have digital jitter.
If you are a beginner, I suggest starting with the pointer multimeter. Although you will find reading troublesome when you first touch the pointer multimeter, you will fall in love with her if you get used to it. Many circuit tests actually don't need reading at all, just look at the deflection of the pointer there. If it is a digital meter, you need to compare the results before and after the measurement to know the line situation.
Both MF50 and MF47 are classic models of pointer multimeters, and MF47 is generally adopted for electrician introduction and teaching. As for the brand of pointer multimeter, "Nanjing Jinchuan Electric Meter Factory (formerly Nanjing Electric Meter Factory)" is an old brand. Although the new model is not as solid as before, it is light in hand, but the quality in pointer multimeter is also very good and worth having.
As for digital meters, the most common brand is the "Victory" brand multimeter, which is cheap and of acceptable quality. There are models ranging from tens of dollars to hundreds of dollars. Novice friends who want to buy a digital watch can buy it, because it won't hurt if it burns out. Don't say that you will pay attention and won't burn the watch. I can say that old electricians have basically burned multimeters, just like people who learn to swim have choked on water. I only burned it once, haha)
If you want quality and accuracy, the "Fluke" brand multimeter can be said to be the best. It has good quality and high accuracy, but the price is also beautiful. The lowest is one or two hundred dollars, and the most expensive is several thousand dollars. If you cherish it, you can use it for several years or even more than ten years.
