Testing a capacitor

[Bunker]

Can anyone advise me how to do this? Strangely Ive not replaced one before (plenty of motors). I know the microfarads rating is on the side of it but, and please excuse the question....wth is a farad? I know you test it on resistance but whats the procedure please?
Fank ooo.

 

[Roger Welton]

My multimeter has a setting to test capacitors.

 

[galaxy_plumbing]

is not resistance if I remember. Its charge. More few 10k's can give big spark

 

[Paulplumb]

whats the capacitor on?

 

[Dannypipe]

Pump??

 

[Dotty]

A Farad is the unit of measurement of capacitance.

See here

Farad - Wikipedia, the free encyclopedia

 

[SimonG]

whats the capacitor on?

Burner motor. The motors buzz pretty well when the capacitor goes.

 

[Rob Sale]

You need to de energise it by putting a long screwdriver across it to a earth point. if you don't de energise it you could get a serious shock.

 

[Bunker]

You need to de energise it by putting a long screwdriver across it to a earth point. if you don't de energise it you could get a serious shock.

And then what Rob...?

 

[Howsie]

First discharge it as Rob has stated

Then put your multimeter across the pins setting it in the high ohm range 10k-1m

Should start at zero and then move toward infinity, if it doesn't the capacitor is knackered.

 

[Bunker]

Thanks bud, brilliant.

 

[Rob Sale]

And then what Rob...?

Sorry thought it already been explained in previous posts. aye just decharge it and put multimeter on ohms scale if you get OL then its gubbed, if you get less than 10ohms it has a short circuit.

 

[migoplumber]

the ohms scale will tell you if you have short or open cct capacitor.
go to somewhere like maplins and buy a tester with the farad measuring scale.
most capacitors i test are from 10 to 60 micro farads.
they can carry a charge as stated above and store it for weeks so always be wary of the buggers.
set multimeter to farad scale, put both probes on the cap terminals, wait for the beep and check the readings.

 

[b.lynch plum]

Ya every time I de energise one it makes me jump lol