ATO with low rate

[Ronald S]

Hi,

It is possible simple but I cannot get it working.

I want to fill the aquarium with a low flow rate 1ml.min when the level is low.
I have a sensor on level 1.
It is working fine at full dpeed but I want to reduce the filling speed.
I simply cannot figure out how to do.

Regards,

Ronald

[GHL Support]

Do you refill the water with a dosing pump? Unfortunately the speed can't be changed here.

[Ronald S]

Yes I want to refill the evaporated water with the dosing pump.
It is a small tank 130 liter need to refille about 1,2l a day.
Is it not possible that I startup a timer function (manual dosing) when the level sensor gives low from the PLC mode?

[Blahenazo]

My ato pump is 1200 liter/hour pump and my refill takes around 1 minute (adding Max 3 to 5 liters of water)
I just added a T piece after the pressure side a valve and I feed that tube back into my ATO container.
The other side goes to Aquarium

Thefore I can adjust the valve (feedback to the ATO container) and so adjust my fill rate to my tank to something acceptable.


With the dosing pump and some air tubing and plastic needle valves
I'm sure you can construct something that will provide the low flow you need


Remark: while feedback doesn't happen with dosing pumps this extra circuit will provide a feedback loop so you must keep the ATO feed line to the aquarium above the water level.

[Ronald S]

Blahenazo,

Thanks for info.
Of course that is possible.
But it is simple programming issue that's why I boght an aqurium computer.
I asssume that GHL will pick it up and will release it in the next update.

[TheManicFishkeeper]

I have a solution to this.

Create a timer that runs as Cyclic.

Assuming your dosing pump is running at approx 60 ml / minute that means you get approx 1ml/second

For your timer:

Switchmode = Cyclic
Switch on After 59s to 59s
Switch off after 1s to 1s

Now, create a programmable logic that combines this Timer with Water 1 (or whatever sensor you use for ATO).

Programmable Logic:

Input 1: Timer X (the timer you just created)
Input 2: Water 1 (orwatever level sensor is used for ATO)
Function: AND

This means that your socket will only turn on when your water level is low, and Timer X is active, so you will dose 1ml (approx) once per minute until the water level is high.

You can customize your flow rate based on the "Switch Off" time of the cyclic timer. adding a few seconds here or there might be necessary.

With this configuration you would have to increase the "Maximal On Time" of your ATO sensor so it doesnt time out, but it should work.

[TheManicFishkeeper]

Forgot to mention this will only work with firmware 5.07.

and you will need to assign the programmable logic you create to the dosing pump

[Ronald S]

TheManicFishkeeper,

Thanks that was what I am looking for.
I have first to update to 5.07 as I am at 5.05f now so I will do that probably in the weekend.
I will let you know if it works.

Regards,

Ronald