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Picoscope calibration

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antenna:
I have a Picotech 3206D USB oscilloscope and the DC voltage is off by a little bit.  Does anyone know how to calibrate this o-scope?  The DC average voltage with no probe connected is about 460uV.  Maybe that is not so bad, but when the voltage auto adjusts to 20mV, seeing it hover above 0 is annoying.

I can do a math channel to subtract a half millivolt, but I'd like to know if there is a way to adjust it without using a math channel.

Thanks!

ADT123:
Assuming you are using PicoScope 7 then just (with no input signal) click on the "Zero channel offsets" button

antenna:
I am using PicoScope version 6.14.61.6219.  When I click check for updates, it says there are no updates (I am running windows 7 if that matters).

Thanks!

antenna:
I am downloading PicoScope 7 now.

Edit: I realized in PS6 there is a DC offset option under analog options right there in the probe properties tab, been looking right at it for years.. That is all I needed.  Thank you for pointing out 7 to me, I would have never knew about it as I usually leave it up to the software to find updates.  That looks interesting!

Edit2: I like that way better than PS6!  It almost makes me feel like I just bought a new o-scope :)

JPortici:
Is Picoscope 7 still complete shit (but with a "pretty" -not- skin)?
There is the AutoZero in Pico 6 as well, it's in the channel settings somewhere, but it leaves that annoying offset always on.
Sometimes i get offsets, but then i check my grounding scheme and zero returns being zero

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