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August 12, 2017 18:07

How to check whether the capacitor work?

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not know how to check capacitor performance multimeter?The technology test this circuit element is quite simple, the main thing - to be able to use the tester, and follow a few simple guidelines.So we'll continue with the help of some units is easiest to determine if the capacitor and how to do it correctly.

Contents:
  • Preparations
  • method №1 - multimeter help
  • Measure resistance
  • measured capacitance
  • measured voltage
  • Method number 2 - do without instruments
  • What else is important to know?

Preparations

Before checking the serviceability of the capacitor, it is necessary to be sure to defuse.To do this it is best to use a regular screwdriver.Sting You must touch at the same time to two conclusions barrel to spark occurred.After a small outbreak can proceed to the health check.

method №1 - multimeter help

If the capacitor does not work, it is best to check its performance multimeter or tseshka.This device allows you to determine the capacity of "Conder", an open in a keg or a short circuit in a chain.To learn how to use a multimeter we have already told you, so we recommend initially read this article.If you know how to operate the tester, then things are much easier.

Elements photo scheme

The first thing you need to determine what is a capacitor in a circuit: Polar (electrolytic) or non-polar.The fact is that when checking items necessary to observe polar polarity: positive probe must be pressed against the leg of the positive and negative, respectively, to the minus.In the case of a non-polar version details do not need to observe polarity, but will have to check it on a different technology (which we describe below).Once you have decided on the type of item, you can proceed to the verification work, which we will consider in turn is now.

Measure

resistance So, first you need to check the resistance of the multimeter capacitor.For this scheme to unsolder barrel with tweezers and gently move it to the work surface, for example, free table.

The proper dismantling

After that, switch the tester to continuity mode (resistance measurement) and touches the probes to the terminals with the correct polarity.

Please note that if you mix up the minus with a plus and test the operation may fail becausecapacitor immediately fails.To this did not happen, remember the next moment - manufacturers always point out negative contact tick!

Once you touch the probes to the legs, the display of the digital multimeter should see the first value, which immediately begins to grow.This is due to the fact that the tester in contact starts to charge the capacitor.

Initial resistance

After some time, the display will read the maximum value - "1", which indicates the health of the details.

Increase value

If you have just started a multimeter to check the capacitor, and you have an "1", then there was a break in the barrel and it is faulty.At the same time, the emergence of zero on the scoreboard indicates that there is a short circuit inside Conder.Maximum resistance

When checking the resistance you decide to use an analog meter (arrow), then determine the health of the element will be even easier, watching the progress of the arrow.As in the previous case, the minimum and maximum values ​​will be talking about the details of damage and gradual increase in resistance will mean the suitability of the polar capacitor.Analog Tester photo

to independently verify the integrity of the nonpolar Conder at home, enough to touch without polarity tester probes to the legs by putting a mark on the measuring range 2 MW.The display should show a value greater than two.If this is not the case, the capacitor is not working and must be replaced.performance Test

It should also be noted that the method provided above test is suitable only for products with a capacity of more than 0.25 uF.If the circuit element is less than the face value, you must first make sure that the meter is able to operate in this mode, well, or buy a special tester - LC-meter.

measured capacitance

following way to check the health products - breakdown by measuring the capacitance characteristics Conder and comparing them with the nominal value (indicated by the manufacturer on the outer shell, which is clearly seen in the photo).

Marking products

Independently multimeter to measure the capacity of the condenser is not difficult.You only have to translate the switch in the measurement range based on the face value and, if the tester has a special landing slot, insert them in detail, as shown in the photo below.

Useful function multimeter

If this function is not in the tester, you can check the capacity using the stylus similar to the previous method.When connecting the test leads should be highlighted on the display capacity is close in value to the nominal characteristics.If it is not, then the capacitor broken and need to replace the item.

measured voltage

Another way to find out, run capacitor or not - to check its voltage with a voltmeter (or "cartoon") and compare the result with the nominal value.To test you need a power source with a little less stress, for example, to a 25-volt voltage source Conder enough to 9 volts.Observing polarity, connect the test leads to the legs and wait a few seconds, which is quite enough for charging.


Then turn the tester to a voltage measurement mode and perform health check.At the beginning of the measurement on the display should show a value approximately equal to the face value.If not, faulty capacitor.

Please note that when connecting a voltmeter to the keg will gradually lose charge, so significant voltage can be seen only at the beginning of measurement!

Immediately I would like to say a few words about how to check capacitor high capacity in a simple manner.First you need to fully charge the unit for a few seconds and then close the contacts ordinary screwdriver with an insulated handle.If the barrel working, bright spark should occur.If there is no spark or it is very dull, most likely, the capacitor does not work - or rather, did not hold a charge.

What a test phase was not clear to you?Then check performance verification technology capacitor multimeter in this video tutorial:

How to check the integrity of the "Conder"?
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Method number 2 - do without instruments

less qualitative way to check performance of the capacitive element - using homemade continuity in the form of light bulbs and two wires.In this manner, the capacitor can only check for a short circuit.As is the case with a screwdriver, first loads of detail, after which the findings of the probe touch the legs.If Conder works, there will be a spark, which instantly his discharge.For information on how to make a test lamp electrician, we were told.

What else is important to know?

not always test the operation of the condenser requires the use of the multimeter or other testers.Sometimes it is enough to look at visually apparent condition of products that test it for swelling or breakdown.Please carefully review the upper part of the barrel, where the manufacturer applied the cross (a weakness that prevents explosion Conder in case of failure).

Safe design

If you see there is leakage or insulation breakdown, then the capacitor broken, and check it tester it makes no sense.Also, look carefully, not darkened or whether the scheme member is not vzudlsya that happens very often.Well, we should not forget that any possible damage to the motherboard next to the place of connection of the capacitor.This fault can be seen with the naked eye, especially when there is a detachment of the track or change the color of the board.Damage

Another important point that you should take into account - the product checks should be performed only by dismantling it from the board.If you want to test a capacitor, not vypaivaya from the scheme, keep in mind that a large measurement error could occur due to close the rest of the circuit elements.

That's all that I wanted to tell you how to check the efficiency of the condenser multimeter at home.These instructions, we recommend that you use in the repair of mikrovolonovki or washing machines with their own hands, becausein this type of home appliances is very often the case, this failure.Besides Conder often stops working on the air conditioner, power and even graphics cards.So if you want something to repair on their own, we hope that this guide will help you!

Also read:

  • How to check the correct operation of the meter
  • RCD testing methods
  • How to determine the phase and zero the instrument without
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