ORP issues

serpentman · 10/12/2009, 04:29 PM

I am currently using an ORP probe with a PX1000 connected to an AC3 and am getting very strange results. My ORPA is reading ~35mv.2-5. I have a separate Pinpoint meter that is showing 410mv.2-5. I have switched probes to make sure one wasn't faulty to no avail. I would very much like to believe my Pinpoint as the 35mv.2-5 is concerning.

My only thought is there is an issue with the PX1000 or my calibration. Any ideas?

kenargo · 10/12/2009, 05:46 PM

it's reading 35 or 350; just checking. Double check that the port on the PX1000 is set to ORP and not PH (settings, ORP, select ORPA and verify that it is enabled).

serpentman · 10/12/2009, 06:57 PM

Its reading 035. I did verify that the ORPA was enabled. Very strange....

kenargo · 10/12/2009, 07:09 PM

I've never seen a new probe read this low, usually a new probe reads in the low 100s and it takes about a week in tank water before is reads accurate. You might want to call Neptune and see what they think or you might want to give it a couple days and see if the probe readings start raising as the probe becomes fully wetted.

The probe isn't close to other probes? Have you tested it in a cup of tank water; that's always a good test?

serpentman · 10/12/2009, 07:41 PM

I tried it in other parts of the tank as well as in a cup. I also tried in a glass of FW and it went up to about 065.

I suspect the problem may be with the PX1000.

Cwater · 11/23/2009, 11:40 PM

What was the resolution on this? I just received a brand new Lab Grade ORP Probe at it is reading 040 or so in my sump. I then tried it in Ocean water and it now reads 088. How long should it take to break in? Do you think my probe is working properly?

swearint · 11/24/2009, 10:53 AM

My experience with the standard ORP probe tracks pretty close to what Ken described. Looking at my ORP graph from initial setup, it first read ~140 and over about 14 hours ramped up gradually to around 300. Now it cycles from around 310 to 340.

How long has it been reading low, and is it gradually rising? If has been that low for more than several days, I suspect a bad probe.

Todd

serpentman · 11/24/2009, 11:17 AM

No resolve yet. I think I need to send the PX1000 in. I am getting crazy pH readings as well.

Cwater · 11/24/2009, 09:16 PM

I guess that I need to be a little more patient. The ORP reading is currently at 260. Hopefully, it will keeping going up over the next few days.

10/12/2009, 04:29 PM	#1
serpentman part time superhero Join Date: Apr 2006 Location: Deep in the Heart of the Snowbelt (NE OHIO) Posts: 5,698	ORP issues I am currently using an ORP probe with a PX1000 connected to an AC3 and am getting very strange results. My ORPA is reading ~35mv.2-5. I have a separate Pinpoint meter that is showing 410mv.2-5. I have switched probes to make sure one wasn't faulty to no avail. I would very much like to believe my Pinpoint as the 35mv.2-5 is concerning. My only thought is there is an issue with the PX1000 or my calibration. Any ideas? __________________ BS in Marine Bio ('96), First SW tank in 1992. Current Tank(s) 300g SPS with 90g frag tank and 40 anemone tank - decommissioned 46g LPS/Softy Cube 300g FOWLR under construction - decommissioned

10/12/2009, 05:46 PM	#2
kenargo Premium Member Join Date: Jan 2007 Location: Redmond, WA Posts: 8,151	it's reading 35 or 350; just checking. Double check that the port on the PX1000 is set to ORP and not PH (settings, ORP, select ORPA and verify that it is enabled). __________________ Click on my name to visit my homepage and access a collection of AquaController and Apex software, tips, trick and other Q&A including a link to the 'unofficial Apex new users guide' with loads of helpful information and don't forget to put a pin in my location map. Current Tank Info: 225G, BK 300 Deluxe, Deltec PF601, Precision Marine Kalkreactor, 2-LMIII+6 pumps, SpectraPure UHE, Apex, LunarSim, Tunze 6305s. Mixed reef, clam, fish, etc.

10/12/2009, 06:57 PM	#3
serpentman part time superhero Join Date: Apr 2006 Location: Deep in the Heart of the Snowbelt (NE OHIO) Posts: 5,698	Its reading 035. I did verify that the ORPA was enabled. Very strange.... __________________ BS in Marine Bio ('96), First SW tank in 1992. Current Tank(s) 300g SPS with 90g frag tank and 40 anemone tank - decommissioned 46g LPS/Softy Cube 300g FOWLR under construction - decommissioned

10/12/2009, 07:09 PM	#4
kenargo Premium Member Join Date: Jan 2007 Location: Redmond, WA Posts: 8,151	I've never seen a new probe read this low, usually a new probe reads in the low 100s and it takes about a week in tank water before is reads accurate. You might want to call Neptune and see what they think or you might want to give it a couple days and see if the probe readings start raising as the probe becomes fully wetted. The probe isn't close to other probes? Have you tested it in a cup of tank water; that's always a good test? __________________ Click on my name to visit my homepage and access a collection of AquaController and Apex software, tips, trick and other Q&A including a link to the 'unofficial Apex new users guide' with loads of helpful information and don't forget to put a pin in my location map. Current Tank Info: 225G, BK 300 Deluxe, Deltec PF601, Precision Marine Kalkreactor, 2-LMIII+6 pumps, SpectraPure UHE, Apex, LunarSim, Tunze 6305s. Mixed reef, clam, fish, etc.

10/12/2009, 07:41 PM	#5
serpentman part time superhero Join Date: Apr 2006 Location: Deep in the Heart of the Snowbelt (NE OHIO) Posts: 5,698	I tried it in other parts of the tank as well as in a cup. I also tried in a glass of FW and it went up to about 065. I suspect the problem may be with the PX1000. __________________ BS in Marine Bio ('96), First SW tank in 1992. Current Tank(s) 300g SPS with 90g frag tank and 40 anemone tank - decommissioned 46g LPS/Softy Cube 300g FOWLR under construction - decommissioned

11/23/2009, 11:40 PM	#6
Cwater Registered Member Join Date: Dec 2006 Location: Carlsbad, CA Posts: 40	What was the resolution on this? I just received a brand new Lab Grade ORP Probe at it is reading 040 or so in my sump. I then tried it in Ocean water and it now reads 088. How long should it take to break in? Do you think my probe is working properly?

11/24/2009, 10:53 AM	#7
swearint Registered Member Join Date: Mar 2005 Location: Huntsville, AL Posts: 2,645	My experience with the standard ORP probe tracks pretty close to what Ken described. Looking at my ORP graph from initial setup, it first read ~140 and over about 14 hours ramped up gradually to around 300. Now it cycles from around 310 to 340. How long has it been reading low, and is it gradually rising? If has been that low for more than several days, I suspect a bad probe. Todd __________________ Amendment IX The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people. Current Tank Info: 125g Reef

11/24/2009, 11:17 AM	#8
serpentman part time superhero Join Date: Apr 2006 Location: Deep in the Heart of the Snowbelt (NE OHIO) Posts: 5,698	No resolve yet. I think I need to send the PX1000 in. I am getting crazy pH readings as well. __________________ BS in Marine Bio ('96), First SW tank in 1992. Current Tank(s) 300g SPS with 90g frag tank and 40 anemone tank - decommissioned 46g LPS/Softy Cube 300g FOWLR under construction - decommissioned

11/24/2009, 09:16 PM	#9
Cwater Registered Member Join Date: Dec 2006 Location: Carlsbad, CA Posts: 40	I guess that I need to be a little more patient. The ORP reading is currently at 260. Hopefully, it will keeping going up over the next few days.