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03/26/2006, 06:49 PM
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#1 |
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Registered Member
Join Date: Jul 2003
Location: Eugene, OR
Posts: 4,262
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Pinpoint pH monitor problems
I have a pinpoint pH monitor. Its been working great for over a year. But just today after feeding my tank, it keeps jumping all over the place. It ranges from 7.3 all the way to 8.9. It does not stop on any number, rather jumps to all sorts of numbers continuously in that range. I've turned it off to reset it and that hasn't helped. I just calibrated it last week and it was working fine until about 10 minutes ago. Any ideas? Do i need a new probe?
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Great spirits often encounter violent opposition from mediocre minds. Current Tank Info: 75gal, 20gal sump, 6-54w T5 TEK |
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03/26/2006, 06:54 PM
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#2 |
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Premium Member
 
Join Date: Dec 2002
Location: Portland, OR
Posts: 2,897
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The numbers will jump around if the cord does not have a secure connection to the face plate. I would disconnect/reconnect it a couple of times to see if that solves the problem. Secondly, If you run it off a 9 volt battery rather than a plug, you will illiminate any electrical noise that it may be picking up. Lastly I would clean the probe. The probe life is 1 year, so it may be replacement time, but the jumping around leads me to believe you're connection doesn't have solid contact.
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"Give a man a fish and you feed him for a day. Teach a man to fish and he will spend all day in a boat drinking beer." Current Tank Info: 75G Tank, 29G Sump, 100lbs LR, AquaC EV-180, Iwaki MD-20RT return Tunze nano streams 4X54 t-5/Icecap Ballast & SLR's 2x110 vho actinic |
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03/26/2006, 06:59 PM
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#3 |
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Registered Member
Join Date: Nov 2003
Location: Rhode Island
Posts: 453
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Agree 100%
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03/27/2006, 10:32 AM
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#4 |
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Registered Member
Join Date: Jul 2003
Location: Eugene, OR
Posts: 4,262
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I cleaned it just last week. I'll make sure the connection is ok. The probe is definately due for a replacement if the life on it is 1 year. Its been close to 2. I do run the AC adapter as well. I'll see about picking up a new probe. Thanks guys.
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Great spirits often encounter violent opposition from mediocre minds. Current Tank Info: 75gal, 20gal sump, 6-54w T5 TEK |
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03/27/2006, 11:01 AM
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#5 |
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Registered Member
Join Date: May 2003
Location: PA
Posts: 216
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Pinpoints must have a terrrible design because mine can't handle any noise on the incoming AC as well. Battery works fine. Did you add any new electrical devices nearby?
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03/27/2006, 03:06 PM
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#6 |
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Registered Member
Join Date: Jul 2003
Location: Eugene, OR
Posts: 4,262
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No, I moved my tank last weekend. Same equipment though, I might have it plugged in differently though, I think at the old place it was plugged directly into the wall, and now its plugged into a surge suppressor with some other equipment. I'll change where i plug it in as well to see if that help. I think i've got a battery i could use too.
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Great spirits often encounter violent opposition from mediocre minds. Current Tank Info: 75gal, 20gal sump, 6-54w T5 TEK |
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03/27/2006, 10:29 PM
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#7 |
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Premium Member
Join Date: Mar 2004
Location: Ft. Lauderdale, FL
Posts: 5,548
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Also, see that the probe's cord doesn't run near any other electric cords or ballasts. I've seen mine jump significantly from nearby EMF sources, although not as much as what you indicate.
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Beware the power of stupid people in large groups..... Current Tank Info: formerly 250g room divider |
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03/28/2006, 10:54 AM
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#8 |
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Registered Member
Join Date: Jul 2003
Location: Eugene, OR
Posts: 4,262
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Well i moved the AC plug and plugged it directly into the wall. Problem solved!! I still need to order a new probe, but for the time being it is working fine again.
Thanks for all the replies!!! Very much appreciated guys. Miles
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Great spirits often encounter violent opposition from mediocre minds. Current Tank Info: 75gal, 20gal sump, 6-54w T5 TEK |
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