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09/30/2005, 05:35 AM
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#1 |
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Registered Member
Join Date: Jul 2004
Location: Minneapolis/St. Paul Metro area
Posts: 145
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Calibartion drifiting off on ACII
My ph and temp calibration consistently drifts off within a couple weeks. I have replaced probes and the same thing happens. While a seperate ph monitor stays put, my ACII reading are of by +0.4. Recalibrating and probe cleaning haven't solved the problem yet.
Any ideas ? |
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09/30/2005, 09:34 AM
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#2 |
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RC Sponsor
 Join Date: Aug 2001
Location: San Jose, CA
Posts: 4,311
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If you have a serial cable plugged in, then I suspect a ground loop. Use an isolator (SERIPC9) if you are going to have the serial cable permanently plugged in your controller and PC.
Curt |
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09/30/2005, 09:36 AM
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#3 |
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Registered Member
Join Date: Jul 2004
Location: Minneapolis/St. Paul Metro area
Posts: 145
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nope, no cable plugged in.
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09/30/2005, 10:00 AM
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#4 |
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RC Sponsor
Join Date: Aug 2001
Location: San Jose, CA
Posts: 4,311
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Look at the datalogs in the AquaController and see if the drift is correlated w/ something turning on/off. If you can't find anything please give us a call 408-578-3022.
Curt |
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10/19/2005, 07:08 AM
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#5 |
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Premium Member
 Join Date: Jun 2002
Posts: 567
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Ever figure out why?
Thanks |
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