ACIII question

[gflat65]

I pulled my ORP and pH probe, rinsed them in tap water, then oput them back in the tank. I recalibrated the probe because it was reading over 10... After recalibration, it reads 7.01 from the 7.0 buffer and 9.98 in the 10. When I put it back in the tank, it reads over 10. I then calibrated a spare Pinpoint monitor and it reads 7.96. What is going on? It's just a great cap on the day (day from hell and the in laws decided to stay longer than originally planed by about twice as long...). When I put it back in the solutions, it reads correctly, but then reads my tank extremely high. The ORP probe seems to be fried now, too. It reads zero... Any ideas?

 

[rcmike]

Does it read normally if you take some tank water in a cup and read from that? Do you have any float switches hooked to the input/output port. I had a float switch hooked up to my ACIII and was getting some feedback that threw off the pH probe. It would read all over the place.

 

[gflat65]

I haven't actually hooked anything up to it but the probes... It's onyl got the ORP, pH and temp probe attached (not other I/O). I have been bitten with the monster lazy bug... I have an MRC CR6 calcium reactor (for almost 9 months) and still haven't hooked it up...

 

[rcmike]

Did you try to get a reading of the water out of the tank? Could be some stray electricity or something in the tank.

BTW, I am sorry but I think you caught that bug from me. I've been that way for a year or more.

 

[gflat65]

Oh, I don't know Mike. I've been lazy almost all my life. I won't blame that one on you. I gte wild hairs, but that is what it takes to get me going. Having in-laws in tow is a motivator to be busy.

I'll try one out of tank and see what it does for me. Thanks Mike.

 

[rcmike]

<a href=showthread.php?s=&postid=11247110#post11247110 target=_blank>Originally posted</a> by gflat65
Having in-laws in tow is a motivator to be busy.

Gotcha! Been there before.

 

[gflat65]

Interesting. I pulled some water out of tha tank and it was stril very high, but dropped from 10.4 to 9.43. It fluctuated up and down and seemed like it might settle out at 9.43, then would climb and fall... I did change locations for the probe (was where the water enters the sump, and is now where the returns are, so there would seem to be more electricity in th eimmediate vicinity. At 10.0, everything would be dead, right? I lost an ORA coral a few days ago (RTN'd overnight right next to a duplicate of the same coral that still looks fine), but all else seems to be fine. I did have to move a nice blasto of mine that has been degrading, but other blastos in the same system (though under T5's rather than MH) are doing great... If not the electricity, I may have bumped the probes around a little getting them into their new locations, but I wouldn't have thought the minor bumping around would have been a major issue, though (bumping around shaft of probe, not probe tip)... The tops may have gotten wet, as the probes dropped down into the sump in the changeover. Will that create issues?

 

[gflat65]

Just to reverify, the red probe is the OR and the blue probe is the pH, right? There is nothing on the probes or wiring that tells which probe is which, but from reefgeek, there are visuals. Doing these out of tank tests, I have isolated the issue, I think. I noticed that when I pull both probes and only put one at a time into to the out of tank water, the blue probe (presumably the pH probe) reads correctly (almost exactly matches the Pin Point probe). When the red probe (ORP?) goes in, the value jumps to 10.4. If both probes are in the water, the reading is 10.4. How do I go about reaclibrating the ORP probe to see if tha works? I have the instructions, but where do I find a medium for comparison? It sounds like the ORP probe is overwritting the pH values...

 

[rcmike]

Interesting. I would ask them over in the Neptune forum. In other words, I don't have a clue.

 

[NeveSSL]

<a href=showthread.php?s=&postid=11247262#post11247262 target=_blank>Originally posted</a> by rcmike
Interesting. I would ask them over in the Neptune forum. In other words, I don't have a clue.

I was about to say the same. I have no doubt Curt will be more than happy to help you figure it out.

Brandon

 

[gflat65]

I've got a thread over there now, too. Thanks guys.