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https://yabb.autonerdz.com/cgi/yabb2//YaBB.pl General Public Area >> PicoScope >> Probe resistance https://yabb.autonerdz.com/cgi/yabb2//YaBB.pl?num=1318770767 Message started by LucaB on Oct 16^th, 2011 at 5:12am

Title: Probe resistance
Post by LucaB on Oct 16^th, 2011 at 5:12am

Hello to all
A question:
On pico I never understood what is the probe resistance.
I tried to do some measure of resistance, but it is always zero.
Does anyone know the practical use of this probe?
Thanks

Sonda_resistenza.JPG (107 KB | )

Title: Re: Probe resistance
Post by Tom Roberts on Oct 16^th, 2011 at 8:23am

Luca,

Ignore the resistance probe in the loaded section. It should not be there.

Title: Re: Probe resistance
Post by LucaB on Oct 18^th, 2011 at 2:50pm

Tom Roberts wrote on Oct 16^th, 2011 at 8:23am:

Luca,

Ignore the resistance probe in the loaded section. It should not be there.

Hi Tom, and as a tool should be?

Title: Re: Probe resistance
Post by Tom Roberts on Oct 18^th, 2011 at 3:25pm

There are PicoScope models that have this capability but that probe should not appear if your scope does not support it. Just a bug.

But...resistance is a generally useless measurement anyway. Voltage drop and current are much better as they test under dynamic load conditions.

Besides, you can graph resistance if you so desire by deploying a math channel using Ohm's law.

ECT_test_001.jpg (351 KB | )

Title: Re: Probe resistance
Post by LucaB on Oct 21^st, 2011 at 2:26pm

With the response Tom, very nice.
The resistance control in graphical form is useful when I unmount floating gasoline to control

Title: Re: Probe resistance
Post by Tom Roberts on Oct 21^st, 2011 at 2:52pm

Quote:

The resistance control in graphical form is useful when I unmount floating gasoline to control

Huh? :-?