Hi Guys,
I was calibrating my Apex Conductivity meter last night, using the Neptune 53,000 microsiemens/cm solution. When I finished the calibration, the probe read 35.6ppt in the solution. I placed the probe in the tank and it read 33.2ppt, lower than I thought because my refractometer was reading 35ppt.
I then Calibrated my refractometer to 35ppt using the 53,000 microsiemens/cm solution and tested the reef water, which then read 43ppt.
I repeated the process 3 times with 3 different solutions of the same brand of 53,000 microsiemens/cm solution and got the same results every time.
In the past I've calibrated my refractometer using the conductivity solution and never had an issue. Why would this solution not calibrate correctly on my refractometer?
EDIT* This solution is a solution of KCl and RODI water
Second EDIT* Solution was at 78.3 F
I was calibrating my Apex Conductivity meter last night, using the Neptune 53,000 microsiemens/cm solution. When I finished the calibration, the probe read 35.6ppt in the solution. I placed the probe in the tank and it read 33.2ppt, lower than I thought because my refractometer was reading 35ppt.
I then Calibrated my refractometer to 35ppt using the 53,000 microsiemens/cm solution and tested the reef water, which then read 43ppt.
I repeated the process 3 times with 3 different solutions of the same brand of 53,000 microsiemens/cm solution and got the same results every time.
In the past I've calibrated my refractometer using the conductivity solution and never had an issue. Why would this solution not calibrate correctly on my refractometer?
EDIT* This solution is a solution of KCl and RODI water
Second EDIT* Solution was at 78.3 F
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