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- Aug 30, 2019
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I have an ApexEL and the unit wouldn't go into wifi setup mode after it wouldn't reconnect to our wifi. Talked with Neptune and they sent a warranty replacement. Set it up the other day.
The old unit I had had for a couple of months. My ph went from 7.95 at night to 8.3ish during the day. This was spot on most of the time with my manual salifert test (I test ph manually once a week to make sure the probe was still in line). Once I put the replacement unit on line, the ph was reading quite low (7.6ish) so I redid the calibration. It was still a bit low and I wasn't sure I did the calibration correctly (didn't rinse in RODI in between) so I did it again the next day. The probe (same probe as before) is still reading low and no longer matches my manual salifert test. In the last 24 hours, the low was 7.88 and the high was 8.13. This is about .1 off exactly what it used to read and what the salifert test says.
I'm not worried that my ph is low in the tank - I think it's just the reading. Any ideas? I know I've seen old threads on Neptune's forum about low ph readings, but none were due to a new controller unit (typically new probes). I did use Milwaukee calibration fluid (7.01 and 10.01) rather than Neptune fluid. Would that potentially be an issue? I've read that manual calibration is better than the automatic calibration. I have one set of Milwaukee fluid left - should I try the manual calibration? Or just leave it and assume that it's a solid .1 low?
The old unit I had had for a couple of months. My ph went from 7.95 at night to 8.3ish during the day. This was spot on most of the time with my manual salifert test (I test ph manually once a week to make sure the probe was still in line). Once I put the replacement unit on line, the ph was reading quite low (7.6ish) so I redid the calibration. It was still a bit low and I wasn't sure I did the calibration correctly (didn't rinse in RODI in between) so I did it again the next day. The probe (same probe as before) is still reading low and no longer matches my manual salifert test. In the last 24 hours, the low was 7.88 and the high was 8.13. This is about .1 off exactly what it used to read and what the salifert test says.
I'm not worried that my ph is low in the tank - I think it's just the reading. Any ideas? I know I've seen old threads on Neptune's forum about low ph readings, but none were due to a new controller unit (typically new probes). I did use Milwaukee calibration fluid (7.01 and 10.01) rather than Neptune fluid. Would that potentially be an issue? I've read that manual calibration is better than the automatic calibration. I have one set of Milwaukee fluid left - should I try the manual calibration? Or just leave it and assume that it's a solid .1 low?