The only way I've been able to get mine to calibrate is to verify the tank water is exactly 53000, and then calibrate with my probe in the tank, not solution.
this video makes some interesting points about the trapped air in the probe tip as a problem and also starting with a really dry probe,
https://www.youtube.com/watch?v=6pxUb2-LaEo The guy seems to have info others have not given.
How did you do that? Just got my Apex and it seems like this is a major problem for a lot of people. Neptune support has been less than helpful. After two days and trying lots of things, my dashboard still shows Salinity around 1.2 or 1.6. I thinK I may have gotten a bad probe.
My refractometer shows 1024 and I'd be happy if I could just tell the apex to use that measurement. Bit of a pain after spending $800 if you ask me. Appreciate any help.
I tried the method in the video and it calibrated to the standard solution within about 1/2 a point. When I transferred to the tank water it reads 43.5 ridiculous beats me. My Milwaukee tester says 35. Could the probe fail after less than a year? I will dry it out and try with the tank water
The only way I've been able to get mine to calibrate is to verify the tank water is exactly 53000, and then calibrate with my probe in the tank, not solution.
This has worked Thanks to "Diving the World" First adjust tank water to 35ppm with a device you know is accurate like a calibrated refractometer or float device you trust.
1 Let probe dry in air for 24 hours
2. Begin calibration sequence with probe fully dry. Don't get it wet at all.
3 When apex says place in 53,000 solution which is 35ppm (or very close) put
it in the tank or sump and gently agitate it to remove air bubbles. they should
come out the small holes at the side of the probe. Move it to the holder
without taking it out of the water, and secure it in place.
4. Click next in the sequence to finish the calibration.
5. Up-Load to the apex (not sure if this is needed but can't hurt)
6. Fusion should now read 35ppm or very close to it
Let me know if this works
:dance:
The one thing I trust above all others is my Tropic Marin High Precision Hydrometer. It is always dead accurate. Basically I adjust my tank salinity using my TMHPH until it's at 53000, then just calibrate my salinity probe in the tank water.
I've tried dozens of times using solution over the years and it never works. I just keep wasting money on solution. It will read correctly in the solution, but as soon as I put it in my tank it goes wonky.
I can see how this method works better. you are calibrating while the probe is picking up all kinds of electrical noise and interference coming from other probes (like ph), and power cords, etc. That's why the reading is different if you calibrate outside of the sump. Even if you take a cup of your exactly 35ppt tank water to calibrate the probe outside of the tank, you will likely not get the same reading if you put the probe in the tank due to the crap noise it is picking up. For the amount of money neptune charges for this, plus the galvanic isolation mumbo jumbo they claim, I think this should just work without going through hoops (just one of the many things that don't work well in Apex but people are afraid to talk about). your tropic marin is not affected by it right?
its still good practice to check the salinity outside of the tank to compare. salinity should be the same regardless if it is measured in the tank or outside.