How to measure a short circuit with a multimeter, the buzzer of the multimeter measures a short circuit
This kind of situation can be calculated to show that the equivalent resistance between the two points you are measuring is very small, but it does not mean that it is a short circuit; for the same reason, if you use this gear to measure a high-power electric heating tube, it may be falsely reported as a short circuit . But you can't say it's short-circuited.
Before testing, it is helpful to have a general understanding of the specific conditions of the circuit you are testing to determine whether there is a real short circuit; the test you do is a bit like a sandbox test, and the results obtained by the instrument must be combined with the actual circuit conditions to make a judgment ;If the equivalent on-resistance of the circuit you want to measure is 1K when it is working normally, and one day you find that you use the diode gear measurement to tell you that it is a short circuit, then it is likely to be a real short circuit.
Turn off the power first, adjust the function switch of the multimeter to the buzzer position, put the two pens of the multimeter on the two terminals to be tested, if there is a short circuit, there will be a buzzer, and a small conduction voltage value will be displayed. There is a short circuit between the measured points.
1. Multimeters, also known as multimeters, multimeters, three-meters, multimeters, etc., are indispensable measuring instruments in power electronics and other departments. Generally, the main purpose is to measure voltage, current and resistance.
2. According to the display mode, the multimeter is divided into pointer multimeter and digital multimeter. It is a multi-functional and multi-range measuring instrument.
General multimeters can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level, etc., and some can also measure AC current, capacitance, inductance and some parameters of semiconductors (such as β).
What is the meaning of multimeter uf
Step 1: Use one to short-circuit and discharge the capacitor.
The second step: hit the appropriate capacitor file. (Generally choose a gear that is larger than the nominal value of the capacitor capacity)
Step 3: Connect the two test leads to both ends of the capacitor, and the display will display the value, which is the capacity of the capacitor. (The numerical unit is generally the same as the unit of the gear position) The uF on the multimeter means that the function of the gear is to measure the capacity of the capacitor, and the reading unit of the measurement result is (uF).
