How Do You Test A Motor Capacitor

This is a updated video with much better picture quality then my other test capacitor videos. This article gives a description of electric motor capacitor test procedures to determine if a capcitor is damaged or working normally test procedures to measure the capactors capacitance or microfarads mfd or uf to determine if it is working within its rated capacitance range.

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Testing procedure for capacitors using a standard analog multi meter.

How do you test a motor capacitor. You can check to see whether a capacitor is good or bad using an ohm meter but first you have to remove the capacitor from the circuit and discharge it. You can do this test with a multimeter if you have a capacitance meter or you have a multimeter with a feature to test the capacitance. Video on showing how to check test motor start and motor run capacitors to see if the capacitance is within tolerance which is plus or minus 6.

Retest the capacitor with the meter. Wear work gloves and use a screwdriver with an insulated handle so you dont shock yourself. To check a start capacitor start by turning off and unplugging your appliance.

Also this method is good to test the tiny capacitors as well. If you need to run a capacitor test on your system there are several safety measures that should be taken. Here i am testing a start capacitor and a run capacitor for an electric fractional horsepower single phase motor.

To this test rotate the multimeter knob to the capacitance mode. Motors or compressors wont run properly. If the capacitor does not test as described above short out the capacitor leads one more time in case residual voltage is in the capacitor.

Replace the capacitor if it fails the test again. Many household appliances have an electric motor start capacitor and when this wears out the motor doesnt have enough energy to cycle on. This article series gives electric motor start run capacitor and hard.

How to test an electric motor capacitor. The capacitor stores an electrical charge and is comprised of one or more pairs of conductors separated by an insulator. This video demonstrates how to discharge and test a capacitor.

How to test electric motor capacitors. The capacitor is a commonly replaced part for a motor or compressor that wont start. Run capacitors maintain a fairly consistent voltage supply and increase the torque of hvac motors at startup.

I used a klein tools mm2000 and a klein tools cl1000 most fluke meters have these same settings. Then use a screwdriver to open the appliance so you can locate the capacitor which is a metal tube that should be near the motor.

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