How to measure the short circuit of the wire with the multimeter, and use the buzzer to measure the short circuit and open circuit problem
Give you a multimeter, let you use it to check whether there is a short circuit or open circuit in the line, do you know how to operate it, about how the multimeter measures the short circuit of the wire, here is the focus of using the multimeter's buzzer to measure the short circuit and open circuit Methods.
How to measure the short circuit of the wire with a multimeter
How to measure the short circuit of the wire with the multimeter, and use the buzzer to measure the short circuit and open circuit problem
1. Multimeter measures short circuit
The multimeter has a wide range of uses. It is used to measure whether there is a short circuit in the circuit, which is one of its commonly used functions.
Measurement method: The multimeter function switch is set to the buzzer gear, and the two test leads are placed on the two terminals to be tested. If there is a buzzer sound and the on-voltage value is small, it means that there is a short circuit between the two points.
How to measure the short circuit of the wire with the multimeter, and use the buzzer to measure the short circuit and open circuit problem
2. Multimeter to measure line insulation
Another method of measuring short circuit with a multimeter is to use a multimeter to measure the function of line insulation to determine whether the line is short-circuited.
Taking the measurement of single-phase-to-ground insulation as an example, when the insulation value is zero (metallic grounding) or very low (non-metallic grounding), it means that this phase line is grounded, and when it is not grounded, the insulation value is higher.
Then, use a multimeter to measure the phase-to-phase insulation. When the phase-to-phase insulation is zero, it means that there is a short circuit between the two-phase lines.
How to measure the short circuit of the wire with the multimeter, and use the buzzer to measure the short circuit and open circuit problem
3. Multimeter to detect short circuit or open circuit
It is very convenient to use a multimeter to measure a short circuit or to use a multimeter to measure an open circuit.
First of all, in the case of ensuring that the line is out of power, use the resistance gear (the pointer meter puts the RX10 gear, the digital meter is sometimes called the on-off gear), and touch the two meter rods to the two points (or two lines) to be measured, and the pointer meter does not move. It is an open circuit, and it is a short circuit when the full scale is thrown over.
If you are using a digital multimeter, there is no change in the numbers and there is no sound, it is an open circuit. When the multimeter beeps, or the number is zero, it is a short circuit.
The above is the method of measuring the short circuit or open circuit of the wire with the multimeter. I hope it will be helpful to everyone.
