Multimeter measuring line breakpoint position
Just imagine, if there is no electricity suddenly, what will our life be like? I can't imagine, because even if it's just a brief power outage, people will panic and desperately seek power. Having said that, after a long time, it is difficult to guarantee that there will not be some small faults in the wiring in the home, such as a short circuit of the wire, and it is impossible to determine the fault point. Do you have to alarm the master electrician? An appearance fee is so expensive. In fact, there is no need at all, you can solve it by yourself. You can use the multimeter as a tool and use the beep file of the multimeter to measure which of the several wires is blocked.
PS: What is the beep file? What is the role?
The buzzer gear is generally used to quickly judge whether the circuit is on or off. When the measurement is on, the buzzer will beep. It is also used to check the state of the diode, the red pen output + voltage, and is often used to detect whether the circuit is conducting, because the buzzer can make a sound below 50 ohms, which is more convenient.
Here are the steps to find a break in a wire with a multimeter:
First of all, adjust the multimeter to beep mode. Before measuring, be sure to short-circuit the two test leads to check whether the multimeter is normal. If it is normal, the resistance value is 0, accompanied by a beep.
Then, directly measure the wire where there may be a break. During the measurement process, if the multimeter does not respond when measuring a wire, it proves that the wire is broken, and there will be a break point somewhere in the middle. Measure another wire, and the value of the multimeter is changing, which proves that this wire is connected and can be used normally.
After finding the broken wire, be sure to connect one end of the broken wire to the live wire, live measurement, the measurement results show that it is a live wire, 220V. Then use the 20V AC voltage gear of the multimeter, why use this gear? Because this gear can find the breakpoint of the wire.
Next, wrap the wire of the black test pen around your finger a few times, which will increase some values. Then hang the black test lead in the air, use the red test lead to directly measure the insulation sheath of the wire, observe the numbers of the multimeter, sweep from the inside to the outside along the insulation sheath, and the numbers displayed by the multimeter are also constantly changing. When the number of the multimeter suddenly becomes smaller, it means that the breakpoint has been found.
