Products > Test Equipment
Differential probe for offline PFC'd PSU
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Faringdon:
Hi,
The following diff probe used to be some £180 just  4 years ago....

https://uk.farnell.com/pico-technology/ta041/probe-active-differential-powered/dp/1667343?st=differential%20probe

....now £319 !!!

As far as i am concerned, its now time to take my Rigol 40MHz scope, and simply and cheaply  snip the earth lead from the  mains cable that supplies it...and just be jolly careful i dont touch the scope ground clip or scope BNC whilst the scope is powered. Since AYK, when earth lead is snipped....the  scope ground is then connected to the capacitive divider point of the input filters' Y caps...which is 2 Y caps in series, across Line-Neutral.

I know people say the scope can be damaged like this....but i worked at a big electronics company where they routinely did this and had no problems.
People say the Y caps can get overvoltaged if a transient occurs when the scope earth lead is snipped...., but i havent seen it happen.
BrokenYugo:
Why do you think the rules don't apply to you?

tautech:
Calling Darwin.....award presentation coming up and your services will be required !
Fulmir:
If you're gonna do something silly with a big piece of equipment why don't you try building your own dif probes instead? That at least seems less likely to fry you or the scope...
nez:
I see the Micsig DP10007 for £134.52 on Banggood, with apparently free shipping to UK..  I'm sure the noise and CMRR isn't quite as good, but it has a much higher bandwidth and much better price (as well as being better than nothing!)



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