Thanks for the automatic scaling ideas. At this time, this feature is a "nice to have" so I will first focus on "protection".
My current problem is to ensure I'm not going to blowup my PIC if I do a mistake.
Just see an example of batteries farms I take care of. There are batteries in three different models: 2V 1750Ah, 6V 160Ah and 12V 4,5Ah.
<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=3427&stc=1&d=124361125 9">
If one of my probes falls off my hand and touches any contact somewhere on any other battery while I'm doing the measurements, it can kill my PIC whithin a blink of an eye.
Basically, I need to find a way to protect my PIC (from voltages over 12V) whithout loosing accuracy during the measurement process.
The upper voltage limit is 580VDC, but it is almost impossible to be that inattentive and make such a mistake (well, I'm human so everything is possible)!
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