Detailed Introduction to the Use of Mechanical Multimeters
Mechanical multimeter, also known as analog multimeter or pointer multimeter, is the earliest three meter used to detect electrical equipment, divided into resistance, current, and voltage levels.
The current and voltage levels are divided into DC and AC levels, and AC voltage is not positive or negative. For example, to detect 220V household AC power, you only need to set the level to 250V or 500V, check the pointer swing, and the second grid on the dial is the current and voltage level. For 220V, the 250 level should be set between 250 and 200.
For the 500V range, check the 50 meter positions below. For the 220V range, it should be 2/3 more than the 20 meter positions, and then multiply by 10. Although the digital meter is not accurate, it can be determined that the voltage is normal. Check the 10th position of the 1000V range, the third position, and the 220V range at the back of the 2nd position. Multiply the reading by 100.
The DC voltage is divided into positive and negative, with the red pen indicating positive and the black pen indicating negative. Do not make mistakes, otherwise the needle will point back, which may cause damage to the meter in the long run. On the other hand, when detecting the second and third level tubes, the black pen is positive and the red pen is negative.
The resistance range is widely used, which is also the reason why digital meters are slightly inferior to pointer multimeters. However, it requires zero adjustment, which is the most annoying and not as durable as digital meters, making them easily damaged and fragile. However, detecting the leakage of circuits and electronic components is stronger than digital meters. Setting it to 10k can basically solve the majority of circuit leakage problems.
The method of use is to set the resistance to a certain position and first adjust it to zero, such as 1k, where the pointer is placed multiplied by 1k, and the same applies to other positions. If the pointer returns to zero, then shift to 100 or 10 gears. Most pointer meters do not have a beep gear, selecting gear 1 can determine whether the wires are on or off. It can also detect electronic components such as capacitors, diodes and transistors, power transistors, etc. No more details will be mentioned, please search on Baidu.
Summary: Overall, a pointer meter is not as good as a digital meter, and the damage rate of using a pointer meter is higher. It is not suitable for electricians who go out for maintenance, but for personnel who repair circuit boards.
