Kaip į matuoti the on-off of live line with multimeter
In elektrotechnika ir elektra pavara, elektra yra padalinta į silpną srovę ir stiprią srovę, ir taip pat į žemą įtampą, aukštą įtampą ir itin aukštą įtampą. Tačiau, ten yra stipri elektra arba net aukšta įtampa elektra in silpna elektra, toks as TV, perjungimas galia tiekimas ir LED šviesa galia tiekimas, kuris is as silpnas as keli voltai ir as aukštas as daugiau nei 10 tūkstantis voltų. Yra yra žema įtampa elektra ir silpna elektra in aukšta įtampa, nes kontrolė sistema valdikliai aukšta įtampa pagal žema įtampa, ir silpna elektra valdikliai žema įtampa už saugu veikimas.
I don't approve of simply measurement the on-off of live lines with a multimeter! You can measure whether there is electricity or not with a stylus, or you can use an ohm block to measure the quality of the line after power failure.
Electrician is a high-risk industry, and kartais it needs to measure data. Be elektros, it is neįmanoma to measure the actual data voltage and current. And waveform diagram. Live measurement belongs to live work. Nors there are labor protection articles, insulation gloves and shoes, it is really inconvenient for that guy to bring work. Let's talk about the difficulty of work!
As for how to use the multimeter, you can read the instructions and go to Baidu. Everyone's answers are very good, so I won't repeat them. What I want to express is the precautions for live measurement, how to work safely and use the multimeter safely.
Live matavimas iš silpna srovė
When measuring, don't blindly measure first. Check the weak current and strong current in the circuit, choose a good gear, and measure the voltage below DC and AC24V. There is basically no danger, but don't touch the commercial power, high voltage parts in the equipment and large capacitors.
Kai matavimas the high voltage in low-voltage equipment, the best way is to cut off the power and discharge (įskaitant talpą) first, then select the gear of the stylus, place the measurement point, and then send electricity to read the measured data. The digital multimeter has a memory button, and you can press the memory button, which will be safer.
Kai matavimas įtampa su a multimetras in the factory, the line is ne būtinai prijungtas su įtampa, ir the line is tikrai ne prijungtas be įtampos.
Because it is live measurement, there is a transformer and a motor in the line, and there is electricity at the breakpoint, and there is also electricity at the breakpoint. The electricity at the breakpoint is power supply electricity, and the electricity at the breakpoint is electricity from another phase connected in series through windings or coils. We must pay attention to this phenomenon. Therefore, it is inaccurate to measure the on-off of the line with a multimeter! For commercial power, it should be single-phase electricity. If the live wire is broken, there will be no power supply, but if the neutral wire is broken, the phenomenon that there is electricity and no voltage will be detected.
To sum up, it is correct to measure the on-off of the line with a multimeter. If you don't go around yourself, the best way is to use an ohm block after power failure or use a shakeking table to measure the on-off of the line more accurate.
