Dosing or adding Salt water from AWC channel or program? Trying to figure out a good solution.

[AZMSGT]

I’m trying to stabilize salinity on my tank. During AWC and ATO operations I’m watching my salinity drop. No matter where I put the AWC output I find that my salinity will drop. Also salinity drops due to automated water testing of the KH director and soon it will get doubled with the ION director.

I want to set things so I can dose saltwater or RODI water from my Maxi dosers that run my ATO and AWC. Problem is they are tied to a control circuit and timers.

Any idea how I can still have the GHL AWC and ATO premade program running and indipendently dose SW or RODI based off of a salinity reading? Oh and they can only dose as evaporation happens and a level sensor calls for water.

For instance.
ATO function senses low water.
It checks the conductivity/salinity probe and doses from SW pump or RODI pump as needed.
the key is it uses the AWC fill pump or the ATO fill pump.

@Vinny@GHLUSA @Ditto @Matthias Gross ideas on how I can do this?

 

[Dr. Jim]

Although I don't have the time to work out the whole programming, I might be able to point you in the right direction. What you want to do is similar to what I wrote about recently, combining pH Up or Down with ATO control, where either a Kalk or non-kalk pump would be activated. For you, you would combine Conductivity with Fill Water (ATO only). I'm pretty sure you will need to make Virtual Probes for Conductivity. (I wrote about how to do that in my thread mentioned above).
I think the only imperfection will be that you will be able to raise the conductivity, but not lower it. (However, you could program it so a pump used to remove water during water changes could be activated if the salinity gets too high; but, this will get more complicated).

Let's say you want your Conductivity to be 53. So, with Virtual Probes, I'm pretty sure you would make one (Virtual Probe-"Conductivity-2") with the hysteresis range of say, 51-53.0, where the upper number would be used to lower salinity (or activate RO/DI pump); and another Virtual Probe ("Conductivity-3") with hysteresis range of 52.9-54 for example, where the lower number would be used to raise Conductivity (or activate "salt pump."). When using "down" or "upwards" commands, what I found is that it will choose the upper or lower number of the hysteresis range, respectively, (as indicated in the previous sentence). Perhaps others can give there opinions/experiences with this, but this is what worked for me when using pH instead of Conductivity. (BTW, I eventually plan to tie in Conductivity with pH for ATO, so when ATO water is needed and the salinity is low, water will be taken from a saltwater reservoir; If salinity is OK, or high, then water will be taken from either a Kalk reservoir if the pH is low, or just plain RO/DI if the pH is high).

So, under Programming Logic:
G-1: Input 1--Fill water (ATO only) and set sensor #; Input 2--Conductivity-2 or 3 (Virtual Probes that show the hysteresis ranges) with Control upward or downward (depending on which Virtual Probe you selected. Then assign it to the proper pump outlet on the power bar (for "salt" or "fresh" water).
G-2: Similar to G-1 but use the other Conductivity Virtual Probe (e.g. "3" if you used "2" for G-1) set to upward or downward (opposite from the choice in G-1) and assign it to the other pump.

I just re-read your post. I'm not sure how the Maxi's are tied into your timers and circuits, but you would probably have to use another "layer" of P.L. with an OR function.

I'm a little hesitant to post this without trying it, but, I'm pretty sure if it isn't perfect, it should get you on the right track.

Hope this helps.

 

[AZMSGT]

Thank you and I will probably start down the path as you say. But I want to give Vinny and GHL a chance to look at it. Hoping they can add this to the programming logic of ATO and AWC.

 

[AZMSGT]

@Vinny@GHLUSA @Matthias Gross anything?

 

[Ditto]

There is conversations going on at GHL about this. Right now it all about the ION release, and the feature changes coming in the next release of firmware which in my opinion is a major set of changes.

Salinity control on a doser channel is not slated for the next release but the underlining framework support it will exist because of what is being put in because of the ION and the change to the KH on where Adaptive control is going to be done. I believe it is something they want to do and plan to do.

 

[AZMSGT]

There is conversations going on at GHL about this. Right now it all about the ION release, and the feature changes coming in the next release of firmware which in my opinion is a major set of changes.

Salinity control on a doser channel is not slated for the next release but the underlining framework support it will exist because of what is being put in because of the ION and the change to the KH on where Adaptive control is going to be done. I believe it is something they want to do and plan to do.

That would be fantastic. Right now I want to automate things because of a Long trip and I need to figure out how to get my salinity stable.