HerbertMunch
New Member
hi,
i was working on a transformer board, stepping down 230v to 12v (9v on diagram) and was checking the 12v and gnd with my scope, but when i connected the ground of the ptobe, a massive arc occured between the gnd lead of the scope and also blew up some of my gnd traces!
I dont understand because i had just checked the same thing with my multimeter and it registered 12v, no problem.
Why would connecting up my scope have caused this?
I have included the schematic and the board, showing where the traces exploded.
only the xformer, the relay and the bridge rectifier were connected at the time.
I think that my board took the brunt of the arcing, but could the transformer or the scope be damaged?
I would appreciate your input on this matter.
Many thanks,
chris
i was working on a transformer board, stepping down 230v to 12v (9v on diagram) and was checking the 12v and gnd with my scope, but when i connected the ground of the ptobe, a massive arc occured between the gnd lead of the scope and also blew up some of my gnd traces!
I dont understand because i had just checked the same thing with my multimeter and it registered 12v, no problem.
Why would connecting up my scope have caused this?
I have included the schematic and the board, showing where the traces exploded.
only the xformer, the relay and the bridge rectifier were connected at the time.
I think that my board took the brunt of the arcing, but could the transformer or the scope be damaged?
I would appreciate your input on this matter.
Many thanks,
chris