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Hi, after upgrading to P3 I cannot calibrate the PH probe correctly. I have tried calibrating with 4 and 7 and 4 and 9 fluids, but the reading is totally wrong (reading 5.60). The probe(and computer) is under 6 months old, and worked fine before the upgrade. Can you help please?
Regards,
Atle.
aqua_digital
02.01.2010, 18:44
For marine use you should be calibrating with 7 and 9.
Aha, thanks a lot that worked. :)
Regards,
Atle.
tomcoleman
06.01.2010, 12:19
i have calibrated my probe but it said use the 4 and 7 solutions??
do i need to re-calibrate? how do i tell the GHL i'm using 7-9 solutions?
aqua_digital
06.01.2010, 14:08
For Marine tanks as you are reading higher than pH 7 you must set the mid range to 7 and the reference to 9.
How do you tell the controller? By changing the input value when asked to do so.
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