Which type of multimeter is more cost-effective for electricians?
The frequency of using a household multimeter is relatively low. You can buy a pointer type multimeter, which costs about a few tens of yuan. It is also suitable for beginners to use, and it doesn't hurt if it is damaged. The advantage of a pointer type multimeter is that it is cheap, but the disadvantage is that it is not intuitive to read data, and improper operation can easily damage it.
The commonly used portable multimeter can be divided into three types: mechanical pointer multimeter, digital display multimeter, and clamp type digital display multimeter.
Analyze the advantages, disadvantages, and prices of these three types of watches.
Mechanical pointer type 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 display meters, sometimes the values fluctuate up and down, jumping back and forth. Old electricians and electronic maintenance personnel generally like it. But when measuring, it is necessary to adjust the gear correctly. A friend of mine forgot to adjust the gear when measuring 380V voltage. At that time, there was a "beep" sound, and the watch burned out. Fortunately, the good person was fine, and he couldn't have been scared enough. The price is cheap, ranging from tens to tens of yuan.
Digital display multimeter
Precision electronic products are often affected by environments such as magnetic fields and humidity, but if not used for precision electronic circuit measurement, the impact can be basically or slightly negligible. The measurement results are clear at a glance, making it particularly suitable for household use and strong current engineering measurements. This type of meter is currently the most widely used. The price is not high, basically within a hundred yuan.
Clamp type digital display multimeter
Commonly known as a clamp shaped meter, its function is similar to that of 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 watch needles to poke the zero wire, which is safer. For example, some friends on Wukong often ask, 'What is the reason why his air switch always jumps?' By holding a clamp shaped meter, we can know how much current is flowing, and then we can determine whether the wire is thin or the air switch is small? I spent 95 yuan to buy one around 2010. At that time, my salary was basically two days. It's almost ten years now, and besides changing the watch needle twice, I still use it, which is quite good. The price of a regular brand is around 100 to 200, and the price is also acceptable.
summary
I personally believe that ordinary digital displays are sufficient for household use, while clamp shaped watches are more practical for industrial use.
