PermO
Well-known member
Hello,
I know that DC voltage can permanently magnetise the core of a transformer.
But if I have an unknown (audio) transformer and I use a Fluke multimeter to measure the resistance to somehow figure what is what on the transformer...
Will this 'damage' the transformer ?
I ask this as someone mentioned I screwed up two transformers using my Fluke on the windings.
Does a multimeter for a few secs produce enough current to permanently magnetize a transformer core ?
Is this really so ?
I know that DC voltage can permanently magnetise the core of a transformer.
But if I have an unknown (audio) transformer and I use a Fluke multimeter to measure the resistance to somehow figure what is what on the transformer...
Will this 'damage' the transformer ?
I ask this as someone mentioned I screwed up two transformers using my Fluke on the windings.
Does a multimeter for a few secs produce enough current to permanently magnetize a transformer core ?
Is this really so ?