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I had trouble calibrating mine as well. I finally was able to by rinsing the probe in ro water then letting it completely dry out (24 hrs) before calibrating. Since then it has been very reliable although that was 10 months ago and now i think its a little off. Probably time to re-calibrate. But mine has been working well enough that I feel confident using it as a third failsafe for my ATO. Another way would be to get a neptune level sensor but I will need a break out box to do that.In my experience, not talking for others, my salinity probe is very unreliable. It can read 37 ppt and then 25 ppt. I’ve calibrated the thing so many times I have just given up.
The worst case scenario that I can think of is failing to turn the ATO back on, in which case it would take 2 or 3 days for the pump to run dry. I check it every day so I would catch that. The only problem I had before was that when salinity dropped below the cut off it would fluctuate back up and down, repeatedly turning the osmolator on and off and filling for 30 seconds each time that happened. Until the float switch shut it off. So I'm thinking there needs to be a differential between shut off and then back on. So I will try this:I think you have big risk controlling something based in the salinity prob reading. Be cayeful.
A small bubble can throw off the samility ready significantly..
I have gave up on my salinity prob ready accuracy. I use it for relative measurment only not absolut measurment. More like an event monitor...
Got it. Its about what are you controlling at the end of the day good luck...The worst case scenario that I can think of is failing to turn the ATO back on, in which case it would take 2 or 3 days for the pump to run dry. I check it every day so I would catch that. The only problem I had before was that when salinity dropped below the cut off it would fluctuate back up and down, repeatedly turning the osmolator on and off and filling for 30 seconds each time that happened. Until the float switch shut it off. So I'm thinking there needs to be a differential between shut off and then back on. So I will try this:
FALLBACK OFF
IF SALT < 34 THEN OFF
IF SALT > 34.3 THEN ON
The worst case scenario that I can think of is failing to turn the ATO back on, in which case it would take 2 or 3 days for the pump to run dry. I check it every day so I would catch that. The only problem I had before was that when salinity dropped below the cut off it would fluctuate back up and down, repeatedly turning the osmolator on and off and filling for 30 seconds each time that happened. Until the float switch shut it off. So I'm thinking there needs to be a differential between shut off and then back on. So I will try this:
FALLBACK OFF
IF SALT < 34 THEN OFF
IF SALT > 34.3 THEN ON
Can always depend on you air.You can put a Defer so that the reading has to be at that specific level constantly for the set time before the outlet can be affected.
Defer 002:00 then Off
This makes it so the salinity has to be <34 for a whole 2 mins before the outlet turns off. If during those 2 minutes, salinity rises above that set point, timer restarts (not resumes) the next time salinity drops below the set point.
I heard a lot of people say that. I haven't calibrated mine in 10 months and its very stable. And pretty close to my refractometer. Maybe because i have a large sump i don't know.Others mentioned it, but DO NOT TRUST THAT PROBE. No matter where you place it or how many times you calibrate it, it eventually WILL drift.
Put it in the trash where it belongs.
So how would you write that?You can put a Defer so that the reading has to be at that specific level constantly for the set time before the outlet can be affected.
Defer 002:00 then Off
This makes it so the salinity has to be <34 for a whole 2 mins before the outlet turns off. If during those 2 minutes, salinity rises above that set point, timer restarts (not resumes) the next time salinity drops below the set point.
IF SALT < 34 THEN OFF2 separate lines.
Another way would be to get a neptune level sensor but I will need a break out box to do that.
thanks for the code dude. I was beginning to think I was a dentist. Pulling teeth. Awesome that you know that stuff!!!Is your osmolator using its own level sensors to decide when to dispense water?
If so your Apex is best used as a safety backup, cutting power to the outlet when there's a problem.
The code below will only cut power to the outlet if the salinity is so low that your osmolator may have malfunctioned (assuming a set point of 34.)
If it does turn it off due to low salinity indicating overfilling, it won't turn on again for 5 minutes.
Fallback ON
Set ON
If Salt < 33.7 Then OFF
Defer 005:00 Then ON
I'd also add this line to your email/text output, so you'll be notified that something is wrong.
If OutputName = OFF Then ON
To use a Neptune optical sensor, you need an FMM module.
A regular breakout box can be used with a standard float switch or any 2-wire non-powered switch.