The Causes Why There Is No Response When Measuring Capacitors with a Multimeter
There are many reasons why there is no response when measuring capacitance with a multimeter. The deflection amplitude of the multimeter pointer varies when measuring capacitors of different capacities; The deflection amplitude of the multimeter needle varies depending on the gear used.
When measuring capacitors of different capacities with a multimeter, the deflection amplitude of the multimeter pointer varies. Capacitors with larger capacities have greater deflection of the meter pins, such as capacitors ranging from tens of microfarads to hundreds of microfarads. Generally, a multimeter is used in the 10 ohm to 100 ohm range. The larger the capacity, the smaller the range used in the multimeter, so as not to burn out the meter due to excessive deflection of the pins.
On the contrary, the smaller the capacitance, the smaller the deviation amplitude of the meter needle during measurement. For measurements above 1 microfarad, the deviation of the meter needle varies with different capacities when using a multimeter in 1K mode. If the capacitance is less than 1 microfarad and the capacitance is several thousand picofarads or several hundred picofarads, then when we use a multimeter to measure from the 10 ohm range to the 1K range, the multimeter pointer hardly swings. In this case, we can only use the 10K range of the multimeter to measure. The slight swing amplitude of the pointer is very small. Just now, it can be seen that the pointer shakes differently with the size of the capacitance. Therefore, the capacitance measured in this case does not necessarily indicate that it is bad.
If the capacitor remains motionless regardless of which gear is used for measurement (capacitors with smaller capacities may shake slightly when measured at 10K gear), it indicates that the capacitor has been broken and damaged.
Based on the above analysis, if the meter needle of a capacitor with a larger capacity remains stationary during measurement, it can be basically determined that the capacitor has been broken and damaged, and cannot be used. If it is directly deflected to zero, it indicates that the capacitor has been broken down and damaged, and cannot be used.
