Apex Salinity Probe Will Not Zero Out

[Scott Christenson]

Hi Reefers,
The salinity probe for my Apex is not reading correctly and in my troubleshooting I have discovered that it will not zero out. Right now I have the probe out of the tank, completely dry, and Fusion is reading my salinity as 42.3. I have tried calibration numerous times and it will not get to zero. I have tried restarting the Apex and physically reattaching the probe. Does anyone have any suggestions?

 

[Billldg]

Hi Reefers,
The salinity probe for my Apex is not reading correctly and in my troubleshooting I have discovered that it will not zero out. Right now I have the probe out of the tank, completely dry, and Fusion is reading my salinity as 42.3. I have tried calibration numerous times and it will not get to zero. I have tried restarting the Apex and physically reattaching the probe. Does anyone have any suggestions?

I had to do a manual calibration on my probe to get it to read right. Have you tried that?

Lets see if we can get some more help.
@rkpetersen

 

[Scott Christenson]

I have and the dry # is very high, around 663, should be around 40 I believe.

 

[Billldg]

I have and the dry # is very high, around 663, should be around 40 I believe.

Look at this link and try it.

Help! pH probe and Salinity probe not accurate.

Hello, I just purchased 2 brand new probes. Conductivity and double jointed pH probe. They both are plugged directly into my Apex 2016 unit. They are off by about .1 pH and 1 ppt respectively. I have a portable pH tester and it reads .1 higher every time. I have a PM1 on another tank hooked up...

www.reef2reef.com

 

[Scott Christenson]

Sorry, no help there.

 

[Billldg]

You did all this?

Disconnect the probe. Do a manual calibration. Just go through all the steps quickly. Reboot the Apex. Plug the probe back in.
Now try a manual (not automatic) calibration again, but do it in Apex Local, not Apex Fusion.
Use a new calibration packet and have it at tank temperature, and make sure temperature compensation is turned on.

@rkpetersen

 

[Scott Christenson]

Trying now...

 

[Scott Christenson]

Wouldn't I want to see it zeroed out before a waste a calibration packet?

 

[ca1ore]

It’s been a while since I calibrated my salinity probe, but I don’t recall that it’s expected that it zeros out. You remove and dry, and then wait for the reading in the calibration process to settle (I don’t think they actual number matters). Then you calibrate to the solution.

 

[NYG140]

Check your line running back to the controller and keep it away from everything, especially high voltage. These probes are very sensitive to cross talk. I couldn't calibrate mine until I fixed this.