Someone has asked me if there's a way to add a "safety" for dosing. I pondered about this and came up with this solution and currently running it.
Although the dosing program on the Profilux is very accurate, there's no extra safety feature to prevent the pump from dosing. This can be a disaster to our tank if for some reason, the pump keeps pumping additive to our tank.
My solution is using the conductivity probe to tell the pumps to stop if the max allowed conductivity level has been reached. This caused an alarm, the pump stops, and email sent to your mobile device(if you have it set up).
First of all, let's start with my before socket function. As you can see, I have my S1-S4 for dosing and ATO. S1(ALK) use two timers combined in one gate. The rest of the dosers are just one timers.
This is my Programmable logic showing the timer1 and timer 5 OR together for ALK
To do the safe dosing method, you will have to AND the timer with the conductivity alarm inverted. I've used a gate for timer1 and timer5, so I have to AND that gate(1) with the alarm.
Do not forget to invert your alarm. You want the pump to work when there's no alarm.