Which type of multimeter used by electricians is more cost-effective?
The frequency of using a multimeter for household use is relatively low. Just buy a pointer type multimeter, which costs about tens of yuan and is also suitable for beginners to use. If it is damaged, there is no need to worry. The advantage of a pointer multimeter is that it is cheap, but the disadvantage is that reading data is not intuitive and improper operation can easily damage it.
The commonly used portable multimeters can be divided into three types: mechanical pointer multimeters, digital display multimeters, and clamp type digital display multimeters.
Analyze the advantages, disadvantages, and prices of these three types of watches.
Mechanical pointer multimeter
This type of meter is relatively less affected by temperature, humidity, and magnetic field interference, and the measured values are relatively stable and intuitive. Unlike digital displays, which sometimes fluctuate and jump up and down, experienced electricians and electronic maintenance personnel generally like it. But when measuring, it is necessary to adjust the gear correctly. One of my friends forgot to adjust the gear when measuring 380V voltage. At that time, there was a "bang" sound and the watch burned out. Fortunately, the person was fine, but he was also scared enough. The price is cheap, ranging from tens to tens of yuan.
Digital multimeter
Precision electronic products are often affected by environmental factors such as magnetic fields and humidity, but if not used for precision electronic circuit measurements, the impact can be negligible or negligible. The measurement results are clear at a glance, especially suitable for household use and strong electrical engineering measurement. This type of meter is currently the most widely used. The price is not high, basically within a hundred yuan.
Clamp type digital multimeter
Commonly known as a clamp meter, it has similar functions to a digital display meter, but it has an additional function. By clamping the meter on the live wire, the line current of the circuit can be measured without the need to use two meter pins to poke the neutral wire, making it safer. For example, on Wukong, friends often ask about the reason why his circuit breaker always trips. They can use a clamp shaped meter to check the current and determine whether the wire is too thin or the circuit breaker is too small? I bought one for around 95 yuan in 2010, which was basically two days' salary at that time. It has been almost ten years now, and besides changing the hands twice, I still use it. It's pretty good. The price of ordinary brands is only around 100 to 200, and the price is also acceptable.
