Which of the electrician's multimeters is more cost effective?
Family multimeter use frequency is low, buy a pointer multimeter can be, probably dozens of dollars or so, but also suitable for beginners to use, damage is not heartbreaking. Pointer multimeter advantages of cheap, the disadvantage is that the reading data is not intuitive, improper operation is easy to damage.
Commonly used portable multimeter can be divided into three kinds, mechanical pointer multimeter, digital multimeter, clamp digital multimeter.
Analyse the advantages, disadvantages and prices of these three types of meters.
Mechanical Pointer Multimeter
This table by the temperature, humidity, magnetic interference is relatively small, the measurement value is relatively stable, intuitive, unlike the digital display table sometimes fluctuates on the value of the up and down, jumping around, the old electricians, electronic maintenance personnel generally like it. But the measurement must be adjusted to the right gear, a friend of mine in the measurement of 380V voltage, because the gear forget to adjust, then "bla" a sound, the table burned, fortunately, people are fine, can not be also scared enough. Cheap, dozens of dollars to dozens of dollars.
Digital multimeter
Precision electronic products, often subject to magnetic fields, humidity and other environmental impacts, but if not used for precision electronic circuit measurements, the impact can be basically or not counted. Measurement results at a glance, especially suitable for home use and strong electrical engineering measurements, this table is now one of the most widely used. The price is not high, basically within one hundred yuan.
Clamp digital multimeter
Commonly known as the clamp meter, function and digital display table is almost the same, but it has a function, the table clamp on the fire line can be measured out of the line current, and do not need to take two needles to poke the fire zero line, security to be a little higher. For example, Wukong often have friends on the question, his family's air open always jumped the power, what is the reason, take a piece of clamp meter card to know how much current, and then do not know is the line is thin, or air open small? I spent 95 yuan in 2010 or so to buy a, that was basically two days of wages, to now almost ten years, in addition to changing the needle twice, still using, quite good. Generic brands cost around 100 to 200, which is an acceptable price.
