Reefkeeper question

[n2585722]

I got thinking some more on this and came up with a way to do this on the Archon without using night time. It uses one timer and 2 alarms to accomplish.

First is the timer that set the output on during the specified time frame.

Next is the alarm to turn on the output any time the pH is above 7.5 and will turn off below 7.3. It will have to get above 7.5 to turn on again. The alrams have a hysteresis. It is set at .1 which is the lowest setting for hysteresis for alarms.

Next is the alarm to turn off the output if it gets below 6.9. It will turn back on once it get above 7.1. The hysteresis is set for .1 here also.

Now to programming the output using multi-timer using the timer created. On at night is selected. Default is off. Don't want this output to default to on if comm is lost with head unit. No delay out of standby.

Last is setting the alarms for the output It is setup to turn off the output if the return pump is off. Is setup to turn on using CO2 On alarm and setup to turn off using CO2 Off alarm.

Now if we can figure out something similar on the RKE.

 

[fishgate]

Wow you certainly have done your homework! The Archon is still too much $$ for this project. It would be less than 1/2 as much to just buy another CO2 system and put it on another PC4 outlet (that is probably too much too).

It kind of annoys me since this would be so easy to just program into the RKE by DA. All functions should be allowed multiple schedules attached to them it would be such a minimal programing change to the unit.

 

[n2585722]

Have you considered changing out or modifying the regulator assembly? There is a thread on here about making you own assy so the OP of that thread may have ideas on how to add another solenoid to your existing system. http://www.reefcentral.com/forums/showthread.php?t=2461771&highlight=co2+regulator

 

[n2585722]

It kind of annoys me since this would be so easy to just program into the RKE by DA. All functions should be allowed multiple schedules attached to them it would be such a minimal programing change to the unit.

There is a finite amount of memory on that head unit. In fact the did away with graphing to add in some of the features it now has. So to chage things it might be a choice between adding new modules types to the system or changing the current functions.

This is one of the reasons that the Archon came about. It has a memory stick for the permanent memory and graph data. It comes with a 4gig stick, but mine has a 16gig stick in it now. I did not outgrow the 4gig. It developed an issue. When the unit is reset or powered up the program and webpage files are copied into the ram on the Linux computer inside the Archon. After it is copied the Archon executes the programs copied over. This make it easy to back up the programming by just coping the files from the memory stick to a folder on you computer. If need be they can be copied back to a memory stick to restore your programming. I haven't tried it but you should be able to use a copy and place it in a different head unit then hook that head unit in place of the current one and it should take over. You would have to redo things like reserved IP and port forwarding as the head unit would have a different MAC address.