<a href=showthread.php?s=&postid=11868900#post11868900 target=_blank>Originally posted</a> by punkrockdad
I've had a play and I think I know what you are saying.
If I set the pump as a 'timer' rather than a 'dosing pump' in 'socket functions' I can apply timing actions to the pump but lose the dosing pump function in 'extras'?
If i just use the dosing pump socket functions in 'extras' what is the deciding factor on when they should trigger? As I have set all 4 the same but only one triggers at a time...
Sorry for all the questions but if I get it wrong I could kill the entire tank!!
It looks to me that if you use more than one pump, the controller will not activate them at the same time. If you dose twice a day, it will divide the doses equally over the course of the day. And no two pumps will run at the same time. That's what I get out of it. I've pasted the section in the manual that talks about it:
3.16.22 Dosing pumps
Settings for the dosing pump control can be done here. ProfiLux calculates the on-time of a dosing pump
based on the flow rate of the used pump and the desired rate per dosing. The pump can be activated with an
adequate programmed switchable socket (see 3.16.7 Socket function).
A dosing pump unit from GHL is connected directly to an switchable socket output of the ProfiLux (e.g. S1-
S4) and behaves like a conventional or digital powerbar, depending on the used output.
If more than one dosing per day is set ProfiLux splits these dosing operations evenly over the day.
If more
than one dosing pump is used ProfiLux tries to avoid that the pumps are activated in parallel.
First you have to select which of the 8 dosing pumps has to be set.
These settings are possible:
Operating instructions
Date 01/11/2007 Page 56/68
„h Flow rate ¡V The flow rate in ml/min has to be set here. If you are using a dosing pump from GHL the
standard setting (60ml/min) can remain, otherwise here the flow rate of the given pump (see
datasheet) has to be entered.
„h Dosings/day ¡V This defines how often the pump should be activated per day. Adjustable are values
between 0 and 24, 0 deactivates this dosing pump.
„h Rate/dosing ¡V The amount for one dosing.
Hints:
„h The dosing amount in one day is equal to the product of Dosings/day and Rate/dosing. E.g. 4
dosings per day with a rate per dosing of 10ml result in a dosing of 40ml in one day.
„h
Alternatively you can use a timer or a controller (e.g. pH-value or conductivity) to control a dosing
pump.
„h Because of tolerances the actual flow rate of a pump can be different to the specification in the
datasheet. To obtain most precision we recommend to measure the actual flow rate (let the pump
run for 1 minute and measure the liquid pumped in this time), then enter the result of this
measurement under flow rate.
