What do the symbols on the multimeter mean?
A multimeter is a necessary testing tool for electrical equipment, household appliances, and electronic electricians. There are two commonly used mechanical and electronic. Under normal circumstances, most machines use MF47 type, and there are many models of electronic digital multimeters. Multimeters are generally divided into mechanical and digital.
The measurement function of digital multimeter is basically the same as that of mechanical type, and some of them are more than mechanical type to measure temperature, frequency level, conductance and high resistance.
The mechanical multimeter should be zeroed before use. There are letters on the panel of the switch to show the measurement function area. The resistance is represented by ohm "Q", and the meter head is also represented by ohm Q. Before selecting the range, we should estimate the resistance value of the resistance to be measured, and try to be as close as possible to the large resistance value to be measured. If you do not know, you can start from the large resistance value. The normal needle is accurate in the middle of the full scale. The measured value must be multiplied by the number of gears to be correct.
Common symbols for multimeters
①DCA→DC current→microampere (uA)→milliampere (mA)→ampere (A).
②DCⅤ→DC voltage→millivolt (mⅤ)→volt (Ⅴ).
③ACⅤ→AC voltage→Volt (Ⅴ).
④Ω→DC resistance→ohm (Ω)
→Kiloohm (KΩ)→Megaohm (MΩ)
⑤Channel buzzer → buzzer sounds when it is lower than 10Ω.
⑥Capacitance measurement→C*0.1, C*1, C*10, C*100, C*1K, etc.
⑦hFE→transistor DC amplification factor.
⑧dB→Audio level→-10dB~+22dB, 0dB=1mw/600Ω.
