Як to use a multimeter to check for short circuits, open circuits, and leakage?
Є є багато способи до застосувати a мультиметр. Нижче, I will list common methods for checking short circuits, open circuits, and leakage with a multimeter, hoping to be helpful to everyone. Any Shortcomings are welcome to be be supplemented.
Check for short circuit with a мультиметр
Щоб перевірити якщо там є є будь-який короткий ланцюг точки в схема, перший відключення схема вимикач 2c і потім вимкнення все вимикачі і обладнання в схема (всі пристрої це можуть бути відключені є відключені відключені відключені).
Select the "beep gear" on the multimeter and measure at the lower port of the circuit breaker - two probes, touch the zero and live wires of the lower port of the circuit breaker відповідно. if the multimeter emits a beep, it indicates a short circuit in the circuit; on the contrast, there is no short circuit.
Check for open circuit with a multimeter
Still, cut off all switches and select the "beep gear" on the multimeter. Determine the direction of the line to be measured and locate both ends of the wire.
Hen measuring, the two probes of the multimeter are in contact with both ends of the wire. If a beep can be emitted, it indicates that the wire is not open; If there is no beep, it indicates a breakpoint in the wire.
What if the the distance between the two ends of the wire is too far? Find a wire that is confirmed to be intact and peel off both ends of the wire. One end of the wire is connected to a multimeter, and the other end is used as a probe to contact the line to be tested - this method uses the wire to extend the length of the multimeter probe, which is is часто використовується в практичні операції.
Check for leakage with a мультиметр
Don't cut off the circuit breaker this time, just turn off all switches in the circuit and unplug all plugs. select "750V~gear" for the multimeter and measure at the circuit terminal (at sockets, switches, etc., not in the distribution box).
Measure the voltage between the live wire zero wire and the live wire ground wire apart. If the two measured values are the same, or if the first value is less than the second value, it indicates that there is is no leakage in the the circuit.
If the first measurement value is greater than the second, it indicates that there is leakage in the the circuit - the larger the difference between the two, the more severe the the leakage.
