Programming the controller for PH

Hello,

I have a Profilux 3 or 3.1

This is what I have programmed so far but not working.

My lights is programmed to switch on at 11:30 AM and shut off at 7:00 PM.
My PH nominal value is 7.0 and my Hysteresis is 1
Timer 1 : Start time 9:30 AM to 7:00 PM
Programmable Logic G1 : Input 1 PH Value 1 - Increase : Input 2 Timer 1 : Function AND
Switch channel and outlet: Switch channel 4 Function Programmable logic 1

I'm trying to program switch 4 to power on if both conditions are met (Timer 1 Start time 9:30 AM to 7:00 PM) and (PH between 6.0 and 7.0) if not switch power off.

Would appreciate any help.

Thank you in advance.
Richard.

nr. 1 use decrease
nr. 2 you need 2 copys of yor ph probe.
you can only programm this direkt at your p3ex.
set
set both at hysterese minimum value
one at ph6 the other one at ph7 nominal value
set a new programal logik at increase the one and der creas the other ph probe.
set another logik to the first logik and the timer.

Hi,

Thanks for your response.

What would I need to do if I only wanted to cut the CO2 when the PH in lower than 6.2 and when it raises again the CO2 would switch on. ? Would I still to copy the PH probe ? Should I only need to Programmable logic to decrease instead of increase ?

Richard.

in this case there is no need for a copy of the probe.
but you have to set the nominal value at 6.2 the hysterese should be lower than 1.
the co2 will start again if the ph raised to the nominal value + 1/2* hysterese.

Thanks for your help. I will try it and see how it works.

Have a nice day.
Richard.