How to Measure Leakage Current and Short Circuit with a Multimeter
1, How to measure voltage:
Firstly, ensure that the circuit is in a closed state and that there is no direct connection between the measured object and the circuit.
Select the appropriate voltage range on the multimeter. If you are unsure about the magnitude of the voltage, please choose a higher range to avoid damaging the multimeter.
Insert the measurement lead. Insert the red lead into the "V Ω mA" socket and the black lead into the "COM" socket.
Connect the black lead to the common ground or ground of the circuit. This can be the ground terminal of the circuit, or if you are unsure, please connect it to the negative terminal of the battery or the ground wire of the power outlet.
Connect the red lead to the point where the voltage is to be measured. Ensure that the leads are securely connected to the circuit.
Notes:
Before measuring voltage, ensure that the battery of the multimeter is working properly and check if the leads are in good working condition.
Carefully read and understand the voltage range of the measured object, and select the corresponding range.
Do not touch the measuring end of the multimeter to ground or other circuit parts to avoid short circuits or other accidents.
2, How to detect leakage and short circuit:
Firstly, ensure that the circuit is in the off state and disconnect the power supply.
Turn on the residual current circuit breaker or power switch to ensure that the circuit is energized.
Select the resistance range on the multimeter. Common multimeters are marked with the symbol "Ω", representing resistance measurement.
Insert the measurement lead. Insert the red lead into the "V Ω mA" or "Ω" socket, and the black lead into the "COM" socket.
Connect the black lead to the common ground or ground of the circuit. This can be the ground terminal of the circuit, or if you are unsure, please connect it to the negative terminal of the battery or the ground wire of the power outlet.
Connect the red lead to the part between the two contact points of the circuit under test.
Notes:
Before detecting leakage or short circuit, ensure that the battery of the multimeter is working properly, insert the leads correctly, and strictly follow safety operating procedures.
If there is power supply in the circuit, please turn off the power before testing to avoid electric shock or equipment damage.
When using a multimeter for resistance measurement, ensure that no current flows through the circuit being tested to avoid affecting the circuit or instrument.
If you do not have a multimeter on hand or are unsure about the safety of the circuit, it is recommended to have a professional electrician or experienced personnel perform the inspection.
A multimeter is a very practical instrument that can be used to measure voltage, current, and resistance. By correctly selecting the range and connecting the leads, the voltage in the circuit can be accurately measured, and leakage and short circuit problems can be diagnosed.
