ORP Probe with my Digital Aquatics Reefkeeper

demariners · 04/30/2012, 06:28 PM

I have an ORP Probe on my RKL. It showed 280 today and I removed it to test it with calibration solution and it said 370 with a 400 calibration solution. I had already calibrated it before and I wanted to make sure it was correct. I placed in back into my sump and now it reads 200. 80 mV difference within a few minutes. Please any assistance would be appreciated. I am not sure what I am doing wrong or maybe the placement is bad?

USC-fan · 04/30/2012, 09:00 PM

Is the probe new? Orp takes like a week to break in and at least a couple hours to settle when you move it.

demariners · 04/30/2012, 09:02 PM

Probe and controller have been in the tank for 3 weeks or so. Brand new. I guess I will wait a few hours. I bought some calibration fluid. Should I leave it in the fluid for a few hours while it calibrates?

04/30/2012, 06:28 PM	#1
demariners Work In Progress Join Date: Aug 2005 Location: Arizona Posts: 972	ORP Probe with my Digital Aquatics Reefkeeper I have an ORP Probe on my RKL. It showed 280 today and I removed it to test it with calibration solution and it said 370 with a 400 calibration solution. I had already calibrated it before and I wanted to make sure it was correct. I placed in back into my sump and now it reads 200. 80 mV difference within a few minutes. Please any assistance would be appreciated. I am not sure what I am doing wrong or maybe the placement is bad?

04/30/2012, 09:00 PM	#2
USC-fan Premium Member Join Date: Sep 2005 Posts: 3,626	Is the probe new? Orp takes like a week to break in and at least a couple hours to settle when you move it.

04/30/2012, 09:02 PM	#3
demariners Work In Progress Join Date: Aug 2005 Location: Arizona Posts: 972	Probe and controller have been in the tank for 3 weeks or so. Brand new. I guess I will wait a few hours. I bought some calibration fluid. Should I leave it in the fluid for a few hours while it calibrates?