calibrating my ph probe

dadonoflaw

New member
i got a replacement probe which was working great and then i tried to calibrate it the other night because i was getting strange and jumpy readings all of a sudden and it said the probe was defective. what am i doing wrong here? the probe stays in my sump and has been working flawlessly for a month and now this.
 

clp

.Registered Member
What controller? If an AC3Pro are you putting the temperature probe in with the pH probe during calibration? The temperature probe is a ground reference for the pH and ORP probes on the 3 Pro.

Curt
 
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