Ph controlled apex program apex

[snowmansnow]

I'm setting up a ca rx later today and wanted to double check my program

Fallback OFF
Set OFF

IF pH > 6.8 then On
IF pH < 6.2 then OFF

IF pH2 < 7.8 then off (this is the display probe)

Let me know if this is correct
Thanks.
B


So long, and thanks for all the fish.

 

[scuba steve]

Looks good, here's mine for comparison, very similar.

Fallback OFF
Set Off
If CaRxpH &gt; 6.60 Then ON
If CaRxpH &lt; 6.40 Then OFF
If TankpH &lt; 8.00 Then OFF
If Outlet CaRxPump = OFF Then OFF
Defer 001:00 Then ON

 

[blus4ala]

For my own understanding....how does the tankph statement return to the on status? Once the PH falls below 8.0 then it remains permanently OFF since there is no statement to indicate ON again?

Nvm. Was trying to read this on my phone and missed the last line

 

[scuba steve]

It will come back based on the CaRxpH probe.

Once the CaRxpH probe is above 6.60 and the TankpH is no longer below 8.00

 

[snowmansnow]

So do I need an on statement ?? Will it remain off if my display goes &lt; 8?


So long, and thanks for all the fish.

 

[scuba steve]

The on statement is "If CaRxpH &gt; 6.60 Then On"

The TankpH comand is in place to protect the display from CO2 dosing to the reactor and dropping the display's pH to unsafe levels.
If TankpH is less than 8.0 the C02 outlet will stay off. If the TankpH is over 8.0 then the outlet will turn on or off based on it the CaRxpH probe.