pH Calibration Port

mneville277
Posts: 1
Joined: Sun Mar 29, 2015 8:31 am
How many years have you been in the hobby?: 0

pH Calibration Port

Postby mneville277 » Wed Apr 15, 2015 5:46 pm

I just got the RKL with SLX three weeks ago, and no matter how many times I calibrate the pH probe, it reads very low on the "pH" port, but high on the "pH/ORP" port in comparison to multiple other test kits. When I calibrate, it has always read right at 7.0 and 10.0 using Pinpoint solution. I reloaded firmware version 1.03, and now the raw data for 7.00 is reading -248 and shows a pH of -5.42.

I have tried three different packets of solution, reset the system, and reloaded firmware on all. The pH has never read right, but assuming the system is less than a month old and it WAS getting readings on both ports (albeit different values), shouldn't be the probe, so what's the course of action?

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n2585722
Posts: 6168
Joined: Mon Sep 08, 2008 5:54 am
How many years have you been in the hobby?: 30

Re: pH Calibration Port

Postby n2585722 » Sun Apr 19, 2015 10:31 am

First off how long has the probe been in the tank? Does it read ok when you place the probe on the calibration packets after the calibration? How long are you leaving the probe in each packet before you save and continue? Also post the way you have you modules hooked up. Start with the head unit.
thanks,
Danny


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