Conas ilmhéadar a úsáid chun ciorcaid ghearr a aimsiú?
Short-circuit measurement is very common in electrical maintenance and component fault location. When measuring short-circuit faults, be sure to disconnect the power supply, and remember not to operate with power on. For short-circuit measurement, use the buzzer or ohm profile of the multimeter to measure. The buzzer is used to measure more intuitively. When the line is short-circuited, the multimeter will "buzz" directly. The principle of buzzer is when the measured resistance is less than about 75Ω, the multimeter A beep occurs. If you want to know the resistance value between the two lines more accurately, you can use the 200Ω measurement. Using the buzzer mode to measure, sometimes the actual internal resistance between the two signals is small, it is easy to misjudge, such as relay/contactor coil, many relays/contactor coil impedance is less than 75Ω, using the buzzer mode measurement will The buzzer sounds like a short circuit, but it doesn't.
Is minic a úsáideann innealtóirí dordánaí an iliméadair chun pointe locht gearrchiorcaid na líne nó na gcomhpháirteanna a fháil go tapa, mar shampla a thomhas cibé an bhfuil an fhriotaíocht agus an toilleoir gearrchiorclach, cibé an bhfuil an dé-óid briste ar ais síos, cibé an bhfuil an triode briste síos (nuair a dhéantar an triode a bhriseadh síos, is gnách go mbíonn an bonn agus an t-astar gearrchiorcadaithe), Cibé an bhfuil ciorcad gearr idir an soláthar cumhachta agus talamh an sliseanna ciorcad iomlánaithe, cibé an bhfuil ciorcad gearr idir dhá bhioráin, etc.
