When repairing household appliances it is often required to test the functionality of one of the most common elements of electric circuits - capacitor.
There are several known approaches to solving this problem, which can be used either individually or complexly. Regardless of the method for checking prior to the start of operation must fulfill important - discharge it with a screwdriver (touching tip to both terminals simultaneously). After therebetween "slip" spark - can go directly to the measurements.
Check with a multimeter
The easiest way to make sure of serviceability of conventional or electrolytic capacitor - "ping" it with a multimeter.
By means of this device it is possible to:
- to measure capacitance element;
- define an open;
- ensure no short circuit.
Important! Before starting the test, first of all, it should be checked to determine the type of capacitor (usually or electrolytic).
It is very easy; just look at his body, at a certain place in the production of which is applied to the icon "plus" or a strip with several "outs." When measuring capacitor capacity is inserted into the slots on the panel multmetra available, then the device is translated to the appropriate mode (photo below);
After installing it on the display indications appear close in value that are applied to the body the inspected products. If this did not happen, and the indicator lights, one "unit" - which means that the defective capacitor. In a similar manner its performance verified using Chinese combined device, one of whose functions - capacitance measurement.
Additionally, you can read my article: https://www.asutpp.ru/kak-proveryat-kondensatory-multimetrom.html
Checking the pointer device
If the device does not have the capacity measurement function - you can use resistance testing mode, during which the judge on the testimony of the capacitor integrity.
Note: To do this, it is more convenient to use an analog device, since the behavior of the moving arrow clearly indicates the status of the test article.
After connecting the measuring probes to the legs serviceable capacitor pointer starts smoothly move upward indications. This points to the normal process of charging capacity installed in the meter battery compartment.
For large denominations, this deviation is clearly visible, and for small values - quite small in scale. However, any fluctuations arrows indicate the health of the measured product. If they are not there - the tested capacitor is defective.
Checking device without (via bulb)
In the absence of instrument performance by the capacitive element can be performed by a simple administration, consisting in connecting it to the mains in series with the bulb filament. If the product regularly checked - the bulb will burn in polnakala, as part of the voltage "drops" on it.
Additional Notes: Verify its working order and can be indirectly by attempting to short-circuit the capacitor terminals when disconnected from the network.
During this operation, between the screwdriver tip and one of the terminals "slip" clearly visible spark. Another variant of this test method - to connect to the previously charged capacitor incandescent bulb up to 20 watts. With his good repair it for a few moments will glow with just a fervor (as shown in the photo below).