ASpec
New member
Hoping for some advice regarding the GHL conductance probe. I have attempted calibration 3 times and each time I am getting different results.
1) Used Tunze 50ms solution and adjusted for temperature compensation of the solution against as infrared temperature sensor and air temperature. Once calibration was complete I placed the probe in a container of my mixed saltwater and the probe act ivy ready the correct 52ms for a moment and began to drop quickly though the 40's and 30's before I removed the probe.
2) Used Aqua Craft 53ms solution and again adjusted for temperature compensation of the solution and air temperature. Once completed I again placed the probe in my mixed saltwater and the activity displayed 2ms for a moment and would drop from 2.0 to 0.0 and cycle back to 2.0 and fall back to 0.0 over and over again.
3) Again used Tunze 50ms solution and did not adjust for air or water temperature, I used the default values which in all honesty would have been off by 3-5 degrees. After calibration and placement of the probe into my mixed saltwater the activity was reading constant 0.0ms.
After the third attempt I simply gave up as I did not have any other ideas.
Some background"¦ I am using a refractometer to check my mixed saltwater which is calibrated against both calibration solutions mentioned above. I am fully aware there is a very scientific process for calibration of salinity and if any external factor (sample solution, air temperature, solution temperature) is incorrect the calibration might not be exact.
I am using a Profilux Plus II EX with firmware 5.0. The probe was used and shows 2200 hours of activity when I received it.
I am not asking for a 100% perfect match and I don't plan to spend $225+ for a replacement probe as I know for a fact (as factual as you can be against a refractometer anyways) my salinity levels are constant as I check my water changes against my display tank weekly. I have a saltwater mixing station and can adjust salinity against my display before making any changes. I keep my salt water at a constant 53ms/1.026sg/35ppt.
It's not that I necessarily have to have this monitor working as I would never use the data for any other purpose than spot checking and logging. I would certainly not use the conductance measurements to add RO/DI water to adjust salinity levels in my display tank; it's more of a want to see this probe work properly than anything.
Any suggestions or advice would be much appreciated.
Thank you
1) Used Tunze 50ms solution and adjusted for temperature compensation of the solution against as infrared temperature sensor and air temperature. Once calibration was complete I placed the probe in a container of my mixed saltwater and the probe act ivy ready the correct 52ms for a moment and began to drop quickly though the 40's and 30's before I removed the probe.
2) Used Aqua Craft 53ms solution and again adjusted for temperature compensation of the solution and air temperature. Once completed I again placed the probe in my mixed saltwater and the activity displayed 2ms for a moment and would drop from 2.0 to 0.0 and cycle back to 2.0 and fall back to 0.0 over and over again.
3) Again used Tunze 50ms solution and did not adjust for air or water temperature, I used the default values which in all honesty would have been off by 3-5 degrees. After calibration and placement of the probe into my mixed saltwater the activity was reading constant 0.0ms.
After the third attempt I simply gave up as I did not have any other ideas.
Some background"¦ I am using a refractometer to check my mixed saltwater which is calibrated against both calibration solutions mentioned above. I am fully aware there is a very scientific process for calibration of salinity and if any external factor (sample solution, air temperature, solution temperature) is incorrect the calibration might not be exact.
I am using a Profilux Plus II EX with firmware 5.0. The probe was used and shows 2200 hours of activity when I received it.
I am not asking for a 100% perfect match and I don't plan to spend $225+ for a replacement probe as I know for a fact (as factual as you can be against a refractometer anyways) my salinity levels are constant as I check my water changes against my display tank weekly. I have a saltwater mixing station and can adjust salinity against my display before making any changes. I keep my salt water at a constant 53ms/1.026sg/35ppt.
It's not that I necessarily have to have this monitor working as I would never use the data for any other purpose than spot checking and logging. I would certainly not use the conductance measurements to add RO/DI water to adjust salinity levels in my display tank; it's more of a want to see this probe work properly than anything.
Any suggestions or advice would be much appreciated.
Thank you
please report back on the support forum so we have everything in one place please, thanks 
