29-12-2011, 09:46 PM
(29-12-2011, 09:18 PM)Bushbaby Wrote: Hi Mark,
I've 4 'scopes that I can use - what do I need to do please?
Excellent - nearly as many as me
Using a pair of X10 probes, after first verifying that they are OK at 120VAC, connect each one to each secondary. Make sure you are triggering from one channel only (some 'scopes offer an "alt-trig" facility) - or perhaps trigger from Line. Observe the two 50Hz waveforms - the phase relationship should immediately become apparent.
Puts safety hat on - as posts can be quoted in isolation (excuse the pun!): Of course, before doing this, you will have ensured that the secondaries are genuinely isolated, as detailed previously in this thread. If in doubt, power the transformer via an RCD, which I think you'll be doing anyway.
Good luck,
Mark
