SOHC.co.uk Forums > CB500/550
Testing Alternator etc
Bryanj:
All you need is a decent multimeter that gives accurate low resistance readings
BigAl (Alan):
A good quality multi-meter is ideal, image attached. Most stator windings that I measure (end to end are around 0.5 ohms) but the test voltage test is only around 6volts.
Back in the day, did you have an high volt coil winding insulation tester (test point end of a winding to the stator frame) ? If you did, what was the test voltage on the machine ?
ST1100:
--- Quote from: BigAl (Alan) on February 05, 2025, 03:42:04 PM ---Back in the day, did you have an high volt coil winding insulation tester (test point end of a winding to the stator frame) ? If you did, what was the test voltage on the machine ?
--- End quote ---
What was the operating voltage of that device?
The "Mega-ohmmeters" regular avail are operating with 250-500-1000V... might be a bit harsh on coils designed for like 60V... but the poof of smoke eases spotting the leak... ;)
Bryanj:
I just used the Honda Sanwa SP10D (analogue meter) for resistance and a megger for insulation, wiring disconnected of course
BigAl (Alan):
Currently using my insulation tester 250v/500v/1000 (as image) which I think (250v) is a bit high...I'm guessing that the workshop machines where rated at 100v/125v?
When the stators come back from the rewinders they measure perfectly (scale 250v) value 200M/ohm's
Memories...When I was a lad at Tech, I was told...It's not a 'mega' it's an insulation tested...as a 'hoover' is a vacuum cleaner
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