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PH 7.95...no probe?
Posted: Wed Dec 12, 2012 7:13 pm
by mcgyvr
No PH probe plugged in yet PH still reads 7.95... (Which is what it said a few minutes ago before I unplugged the probe) ??
Re: PH 7.95...no probe?
Posted: Thu Dec 13, 2012 3:29 pm
by mcgyvr
and today it says the PH is 9.27.. Still no probe attached to it..
Re: PH 7.95...no probe?
Posted: Thu Dec 13, 2012 3:33 pm
by rimai
With no probe, the opamp input is floating and will just register garbage.
Re: PH 7.95...no probe?
Posted: Thu Dec 13, 2012 4:17 pm
by mcgyvr
Guess I should have just looked at the schematic.. I loaded Eagle last night but never opened the RA files.. (What a crappy program btw I don't know how anyone uses it.. or recommends it)