Another Apex salinity probe thread. Help please.

[boacvh]

Hi.

my salinity probe has been working correctly for a year + now. No issues.
I decided to give my sump a thorough cleaning and now the salinity probe doesn’t work anymore. It reads in the 60s.
I tried recalibration, and it didn’t work either. I tried manual calibration too with the probe in my sump and it still doesn’t work. Reads in the 60 range.
I have read the countless threads on how to properly calibrate and micro bubbles, temperature, TC factor, letting it dry for a couple days, etc.
But no matter what I try the apex still reads my salt is in the 60 range. I have a refractometer and also a Hannah salinity tester. I calibrated both of them so I know my tank is at 34.8. Any additional ideas besides micro bubbles and stray voltage? I am pretty sure those are not the issues. Could the probe just be broken now? How to know?
thanks!

 

[vetteguy53081]

There is likely air getting to the probe or dirty. . . . Soak in ro water.
There is another recommendation I forget but i'll put you in touch with our Apex guy.......................... @SuncrestReef

 

[boacvh]

There is likely air getting to the probe or dirty. . . . Soak in ro water.
There is another recommendation I forget but i'll put you in touch with our Apex guy.......................... @SuncrestReef

Thanks @vetteguy53081, I have inverted and twisted the probe completely underwater so I doubt it’s trapped air. Will give it another try.

 

[boacvh]

No. Still doesn't work. Bummer, it was working ok before. But now I get why there are so many posts regarding the calibration of this probe. This is a few days already of trying everything in every thread I could find. I can say unequivocally it has nothing to do with microbubbles. I am almost ready to give up and just ignore it and use my hannah salinity checker for now.

 

[boacvh]

Ha. Of course, had to post the above to immediately find a solution afterwards. So here it is. The simple solution was to follow @rkpetersen steps here: the reboot was the key step.
https://www.reef2reef.com/threads/apex-salinity-probe-calibration.377968/page-2#post-4619407
Remove probe from apex
Make fake calibration
Reboot apex (I just unplugged it)
Then repeat a MANUAL calibration
Working again. Yay!
@rkpetersen thank you!