PH 7.95...no probe?
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mcgyvr
- Posts: 25
- Joined: Sun Oct 21, 2012 7:33 am
PH 7.95...no probe?
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) ??
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mcgyvr
- Posts: 25
- Joined: Sun Oct 21, 2012 7:33 am
Re: PH 7.95...no probe?
and today it says the PH is 9.27.. Still no probe attached to it..
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rimai
- Posts: 12857
- Joined: Fri Mar 18, 2011 6:47 pm
Re: PH 7.95...no probe?
With no probe, the opamp input is floating and will just register garbage.
Roberto.
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mcgyvr
- Posts: 25
- Joined: Sun Oct 21, 2012 7:33 am
Re: PH 7.95...no probe?
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)