Dosing and Timer Help

**fletch** · 25.01.2010, 17:53

Hi

Can anyone help?

I want to do the following with my auto top up:

level sensor 1 on = timer X between 8am and 8pm fill up from dosing pump 1 (fresh water)
level sensor 1 on = timer X between 8pm and 8am fill up from dosing pump 2 (kalk water)

if ph < 8 for X hours take one dose from dosing pump 3 (buffer solution)

Unless anyone can offer a better alternative, this is just an intial thought.

Really appriciate your help!

Thanks

**marinfreak** · 01.03.2010, 09:44

method for what i think you are wanting.

1. use timer 1 set on from 8am to 8pm
2. use timer 2 set on from 8pm to 8am
3. program logic
G1 = level 1 and Timer 1
G2 = level 1 and Timer 2

4. Then assign program logic G1 to socket for pump 1 and program logic G2 to pump for socket 2 if you don't need Ph control if you do ignore this step

5. Now if you want to pump use pump3 for ph<8 then program logic
G5 = Level 1 and Ph Increase
6 assign ph to two position control for ph 8.0 with 0.1 hysteresis and then assign socket for pump 3 to program logic G5

7. Now to stop pump 1 and pump 2 running with ph control them you need another program logic
G3 = program logic G1 NAND PH increase
G4 = program logic G2 NAND PH increase

8. Then assign socket program logic G3 to pump 1 and program logic G4 to pump 2

hope this helps.

**Coralleida** · 01.03.2010, 19:54

Why do you want to use timer to add water.
Instead you can do it automatically. I mean

G1: Level 1 AND pH increase -> Pump with kalkwasser solution
G2: Level 1 AND G1 inverted -> Pump with normal water

**marinfreak** · 01.03.2010, 22:54

Coralleida this is because fletch has 3 pumps not two as you describe in your method. He wants to to control when KALK or water is added between certain times not just on PH. And then PH is low he is going to buffer it up.
That's is my only thought.