>> I used an isolation transformer.
>
> As someone who has always lived almost entirely in tiny voltage
> DC land, I feel I need to ask:
>
> What do you mean by "isolation transformer"?  Are you suggesting
> that ALL measurements on a system which is not galvanically
> isolated from the mains should be done through a 1:1 transformer?

Hi Mike,

Actually the isolation transformer is a 1:1 power transformer, so the line
power to your circuit is isolated and no part of the circuit is "live"
with reference to ground.

That way you don't have to "float your scope" with the potential of making
the scope's case live. etc.

(Although you also can use a fully isolated scope like my THS720 but to be
fully safe you'd want to use a safety probe which has better insulation on
the ground clip. But that doesn't protect you from shock hazard if YOU
touch part of the circuit.)

Cheers,

Bob


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