What gear is used for measuring capacitance with a multimeter
Capacitors are the most commonly used electronic components. The general textual symbol for capacitors is' C '. Capacitors are mainly composed of metal electrodes, dielectric layers, and electrode leads, and the two electrodes are insulated from each other. Therefore, it has the basic performance of "direct flow communication".
Using resistance level detection
The method of using a multimeter resistance range to detect capacitors is of practical value for instruments without setting capacitance ranges. This method is suitable for measuring 0.1 μ Large capacity capacitors ranging from F to several thousand microfacies.
Set the digital multimeter to the appropriate resistance range, with the red and black probes touching the two poles of the tested capacitor Cx respectively. At this time, the displayed value will gradually increase from "000" until the overflow symbol "1" is displayed. If '000' is always displayed, it indicates an internal short circuit in the capacitor;
If overflow is always displayed, it may be due to an open circuit between the internal poles of the capacitor, or the selected resistance range may not be suitable. When checking electrolytic capacitors, it is important to note that the red lead (with positive charge) is connected to the positive electrode of the capacitor, and the black lead is connected to the negative electrode of the capacitor.
Some digital multimeters have the function of measuring capacitance, and their ranges are divided into 2000p, 20n, 200n, and 2 μ And 20 μ Fifth gear. When measuring, the two pins of the discharged capacitor can be directly inserted into the Cx socket on the meter board, and the displayed data can be read after selecting an appropriate range.
The 000p range is suitable for measuring capacitance below 2000pF;
20n level, suitable for measuring capacitance between 2000pF and 20nF;
200n level, suitable for measuring capacitance between 20nF and 200nF;
two μ Gear, suitable for measuring 200nF to 2 μ The capacitance between F; twenty μ Gear, suitable for measuring 2 μ F to 20 μ The capacitance between F.
