How to use a multimeter to measure live line continuity
In elektrotechniek en elektrisch aandrijf, elektriciteit is verdeeld in zwak elektriciteit, sterk elektriciteit, laag spanning, hoog spanning, en ultrahoog spanning. Maar, daar zijn sterk of even hoogspanning elektriciteit in de zwakke elektriciteit, such as TV sets, schakelen voeding voeding, en LED licht voeding voeding, en LED licht voeding voeding, die zijn as zwak as a a weinig volts en as hoog as meer dan 10,000} volts. Er zijn laag spanning en zwak stroom in hoog spanning % 2c omdat de controle systeem controles lage spanning naar controle hoog spanning % 2c en zwak stroom naar controle laag spanning % 2c voor de sake van veilig werking.
If you simply use a multimeter to measure the continuity of the live line, I don't agree! You can use an electric test pencil to measure of there is electricity, or you can use an ohm block to measure the quality of the line after the power is turned offed off.
Elektricien is a risico industrie, soms het is noodzakelijk om met data, en there is no way to measure the actual data voltage and current without electricity. and waveform diagrams. Live measurement is also live work. Hoewel er zijn arbeid bescherming supplies, isolerend handschoenen, and insulating shoes, it is really inawkward for that guy to bring it to work. Friends, tell me that the work is difficult!
1. Meten zwak stroom met live current
Wanneer meten, do not meten blindeling eerste, check de zwakke stroom en sterke stroom in de circuit, select de versnelling, en meet de spanning onder DC en AC24V. groot condensator.
When measuring high voltage in low-voltage equipment, the best way is to cut off the power first, discharge (including capacitors), then select the gear of the test pen, place the measurement point, and then send power to read the measurement data. The digital multimeter has a memory button. , you can press the memory key, which will be safer.
Second, meet sterk elektriciteit en hoog spanning elektriciteit.
Wanneer de multimeter is gebruikt om met de spanning met met elektriciteit in de fabriek, de lijn kan niet be aangesloten als er is spanning, en de lijn zonder spanning moet niet be aangesloten.
Because it is a live measurement, there is a transformer in the line, there is a motor, there is electricity on the breakpoint, and there is electricity under the breakpoint. The electricity on the breakpoint is the power supply, and the electricity under the breakpoint is the electricity from another phase through the winding or coil. , we must pay attention to this phenomenon. Therefore, it is inaccurate to measure the continuity of the live line with a multimeter! For mains electricity, it should be single-phase electricity. If the live line is broken, there will be no power supply, but if the neutral line is broken, it will be detected that there is power and no voltage.
To sum up, it is correct to use a multimeter to measure of the circuit is on or off. If you can't make it yourself, the best way is to use an ohm block after power off, or use a shaker to measure the circuit's on-off is more accurate.
