The multimeter 1K electrically blocks the measuring horn, with only resistance and no sound.
How many ohms is the multimeter 1K? How many ohms is the multimeter 1k equal to? What is the meaning of the multimeter 1k gear? Related technical articles The multimeter 1k electrically blocks the measuring horn with only resistance and no sound.
There are two kinds of multimeters: pointer multimeter and digital multimeter. The digital multimeter can't measure the quality of the horn, but it can only measure that the line rings when it is connected, and it doesn't ring when it is not connected. It is best to use the pointer multimeter resistance file L ohm file to collide with the input line of the horn, that is, the red stylus and the black stylus to collide with any input line of the horn. When the horn hears a click, it proves that the horn is good, and vice versa.
There is another way, using a 1.5V battery, the positive electrode is connected to a wire, the negative electrode is connected to a wire, and the input wire of the horn is connected to collide casually, and it is good to hear the click sound, otherwise the horn is bad. The above two methods are the best ways to judge the quality of the horn. As for measuring the horn with 1K electric block of multimeter, there is only resistance, and there is no sound, so the horn is not necessarily good.
How to measure whether the line is leaking by multimeter?
The leakage circuit breaker is set to a value of 30mA for safe tripping, but with such a high current, whether you use the AC gear of a digital multimeter or the 10K gear of a resistor, you can easily detect that there is leakage.
When charged, try to measure the outside of the conductor with a digital measuring pen. Anyone who only shows "n" is normal, and anyone who shows how much voltage the data is is poor quality or aging. There is a possibility of electric leakage.
Turn on the multimeter AC 250V gear, measure the fire zero should be 220V+- the fire ground should be 220V+- there is also voltage at the ground, and see how much power the household appliances have turned on, and the voltage can be measured to 5V to tens of volts. This is the loop impedance caused by the small diameter of the zero line, which makes the zero line charged. If the zero-ground display voltage is high, it means that the neutral wire diameter is small and it is not worthy of the power of home appliances, so the high-power appliances in the home should be used at staggered times.
Turn off the master brake and break-brake, unplug all plugs, including the indicator light (which is easy to misjudge), turn on the pointer multimeter, and it is normal to use the ohm 10K gear to measure the zero-line pointer.
Re-measuring the fire pointer does not act as normal,
Finally, the zero pointer does not act as normal,
If the pointer moves slightly in the above measurement, it is proved that there is leakage. This phenomenon is that there is leakage in the kitchen and bathroom wall, which makes the wire joint slightly leak when it meets humidity. When checking the line, first turn off the kitchen and bathroom circuit breaker and measure whether there is leakage.
Strictly speaking, shaking table should be used to measure the leakage of wires accurately, but the leakage within 30mA can be measured by a pointer multimeter in 10k, and it will be more sensitive if the digital multimeter is used.
