In a previous post you mentioned you had SOME probes go out. Which probes besides the PH probe you mentioned go out within 6mo? What reading where you getting when your PH probe failed? I have been running the P4 for 2yrs now and the only probe I had fail was my fault. I cracked the glass on the conductivity probe by tightening the probe holder too much. I purchased spares for the Conductivity and PH probe when I purchased my P4 because I read that they should be replaced at a maximum of 2yrs ( I believe 1-1.5yrs is recommended if I remember correctly ) but can fail early if not taken care of properly. I clean my probes every 2 weeks and calibrate once a month. My original PH probe is still very accurate to this day. Just curious on why you waited so long to calibrate your PH probe? I would of thought you would of seen some historical PH drift on your chart. Calibration is recommended by the vendor every 1-3mo. Every time I calibrate my PH probe I find that the probe had drifted upward about .03-.07 according to my chart data in a month period.@Matthias Gross
Mine was with a pH probe. The probe failed within 6 months, and my data shows it. I didn't immediately go submitting a ticket because a I thought it was just a simple calibration issue. I figured 6 months, time to recalibrate, seemed like a reasonable assumption. So I recalibrated, twice. After doing what I could on my end, then I submitted a ticket apparently a couple weeks too late. The ticket may have been submitted a couple weeks after the warranty period, but the probe still failed within 6 months....
Seems like a gotcha to me...a technicality. I'm not trying cheat anyone here. Had it failed 1 day after the warranty period, I wouldn't necessarily be happy, but I would feel cheated.