Kalk Reactor Dosing Min Time Off

[Gallon]

Hello,

I’m trying to program my dosing pump to turn off if my pH is > 8.1 or if it has been running for more than 5 min. My scenario is to make sure the pump doesn’t stay on if the Kalk solution runs out. This is mostly to stabilize any pH swings at night when the lights are off. The Kalk reactor is attached to my ATO so it will refill during the day when the pH is more stable. The coding I’m using is below but the pump stays on. This is very new to me so any help is greatly appreciated.

Fallback OFF
If pH < 8.10 Then ON
If pH > 8.11 Then OFF
Min Time 002:00 Then OFF

[zombie]

Attached to a standalone ATO?

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[RussM]

You should not use two conditional statements for the same probe like that. Instead use a Set and one If probe...

Fallback OFF
Set ON
If pH > 8.11 Then OFF

See this sticky for use of the When and If Error statements to handle “if If ran too long” part of your question. https://forum.neptunesystems.com/sho...-Firmware-4-52

[Gallon]

This is attached to a tunze ATO.

What about turning the doser pump off after 5 minutes in case there is no liquid left in the reactor?

[Gallon]

Sorry just saw your link to the When statements. I’ll give it a go thanks!

[zombie]

The when cant be used directly in a standalone ATO. You need to do one of two things depending on whether you want it to retry on it's own after some time if it runs longer than 5 minutes, or if you want it to latch OFF until you manually intervene. X needs to be a value between the wattage drawn when the Tunze ie powered but not pumping and the power when pumping

Self reset after 6 hours

ATOstuck
Set OFF
If Output ATO Watts > X Then ON
Defer 005:00 Then ON
Min Time 360:00 Then ON

Latch ON

ATOstuck
Set OFF
If Output ATO Watts > X Then ON
Defer 005:00 Then ON
Defer 000:10 Then OFF
When On > 000:02 Then ON


ATO
Fallback OFF
Set ON
If pH > 8.1 Then OFF
If Output ATOstuck = ON Then OFF
Min Time 030:00 Then OFF


Email
(Existing)
If Output ATOstuck = ON Then ON




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[Gallon]

The ATO is set to always on since it has it own controller. This is just for the doser that’s attached to the Kalk reactor. I’m basically dosing two different ways from the Kalk reactor. One is the ATO which pushes out the Kalk solution when topping off then the other is a doser which adds the Kalk solution when the pH drops below 8.11 to help with the pH swings at night when lights are out. Sometimes though the liquid in the Kalk reactor is too low for the dose tube so it just keeps running. Eventually the ATO kicks on and then fills the Kalk reactor back up. I think I like this setup so I don’t add too much ATO water causing the salinity to drop. I can just slide the Kalk reactor back to Auto when the reactor is full. I’m probably over complicating it but it makes sense in my head