AC ripple test

Ask for and share advice on using the PicoScope kit to fix vehicles here.
Post Reply
Posts: 220
Joined: Fri Jan 27, 2012 12:25 pm

AC ripple test

Post by Liteace » Wed Nov 21, 2012 8:34 pm

Bit of a Div question this one, when I get the answer I'll go:

"oh yer, didnt think of that :cry: "

Done an AC ripple test today, here the waveform
Ripple test.psdata
(382.49 KiB) Downloaded 462 times
I also done a bettery test, the battery failed the test, didnt save it but im sure it said at the bottom somewhere AC test OK. I put a volt meter, switch to 200v AC on the battery and got a 30.9 reading, does this waveform look ok ??

Pico Staff Member
Pico Staff Member
Posts: 257
Joined: Thu May 25, 2006 8:02 am

Re: AC ripple test

Post by Alan » Wed Nov 21, 2012 9:35 pm


That ripple waveform looks normal to me. The spikes are interference from ignition or injectors and are pretty normal - wires in the loom run pretty close to each other so such spikes are a fact of life. Switch on a filter - about 10kHz and they will go away.

As for the voltmeter, some of them can not cope well with spikes so give odd readings. Best to rely on the scope :D

Feel free to save the battery test and post here for comment.

Post Reply