Dosing pump and Apex.

[iReefer2]

Hi,

Just trying to set up the BRS Dosing Pump. Turns out that I need to run the dosing pump for 35 seconds at a time.

However I'm reading that its only possible to set up outlets to the minute.

I'm running the full Apex system and EB8, just wanted to check and make sure there wasnt another option.

Thanks for your help in advance.

 

[swearint]

You are mistaken. There are various commands, each of which have limitations rather than the outlet. For instance, the If Time command is accurate to the whole minute. The OSC, Min Time, and Defer are accurate to the second.

Todd

 

[iReefer2]

Perfect. Sorry for the mistake.

So... What would be a good code for this then?

Set OFF
If Time 11:00 Then ON
Defer 00:00.35

I just want it to turn the dosing pump on for 35 seconds each day at 11 AM.

Week 2 I have to bump it up to 70 seconds, and bump it up again each week, but I will change the code each Sunday.

Any help would be appreciated.

Thanks

 

[JHawlz9989]

I use the OSC command for my top off and dosing needs.

OSC 035:00/029:25/000:00 then off

If I recall correctly.

Hope that helps,

Josh

 

[iReefer2]

I looked at someone else coding and came up with this.

Can someone else comment and say whether it looks correct?

Thanks

Fallback OFF
OSC 0:00/00:35/59:25 Then ON
If Time 11:30 to 10:59 Then OFF

 

[iReefer2]

Anyone have any input on this?

 

[swearint]

I looked at someone else coding and came up with this.

Can someone else comment and say whether it looks correct?

Thanks

Fallback OFF
OSC 0:00/00:35/59:25 Then ON
If Time 11:30 to 10:59 Then OFF

Yes, that will work.

Todd

 

[Landsailor]

Anyone have any input on this?

Yeah...what size tank are you running?

You will dose six tenths of a milliliter with that timing. It may not even be enough to brake the surface tension of the water and get anything out of the tube. (Technically, that's 12.6 drops of water.)

 

[JohnV8r]

Can't you use the Pump Wizard for this?

I have (I think) my BRS doser set up to dose vodka (diluted 3 parts RO H2O/1 part Vodka) at 2.2 ml every 6 hours, thereby giving me a total of 8.8 ml of solution (2.2 ml total vodka) dosed evenly throughout the day.

From the Apex Display:

Fallback: Off
Off time: 360:00
On Time: 2:00
Off Time: 0:00
Feed: A
Feed Delay: 000

Does that look correct?

 

[iReefer2]

What's the pump wizard? Do you have a link.

Yeah, I am just starting with vodka dosing. So only need a small amount for this week. Thinking of switching to Vinegar instead, heard good things, and that would make it easier to dose.

Thanks for all your help everyone, Will get it set up tonight.

But I definitely would be interested to know more about Pump Wizzard.

 

[Landsailor]

The Pump setting in the Outlet setup. It basically sets up an OSCillate command for you.

 

[RussM]

If you understand the actual commands, then there is no need to use Pump type control.

That is a minuscule amount dose per day. Consider diluting it with RO/DI to get a larger and probably more consistent dose. Use whatever ratio suits, but I would to a 1/10 dilution. The math is easier that way. (1 part additive, 9 parts pure water). Then the dose is simply 10x what the full strength dose would be.

 

[JohnV8r]

@RussM: That's a great suggestion. I'll have to wait until I've dosed a significant amount of my current mixture to have room to dilute it to a 1/10 solution.

 

[A.VOID]

USe the OSC command. Works perfectly for me. I use two BRS pumps and OSC works flawlessly.

 

[iReefer2]

So I figured out how to make the OSC command dose the correct amount of time. Been doing so for a couple of weeks.

Now I want to split the dosage across 2 different times during the day.

This is my current code:


Fallback OFF
OSC 000:00/014:51/045:09 Then ON
If Time 11:30 to 10:59 Then OFF

Can someone show me how to split this into 2 doses across the day?

Thank you!

Ireefer2

 

[RussM]

Can someone show me how to split this into 2 doses across the day?

Cut the OSC ON time in half, then adjust the OSC OFF time accordingly so the total is still 60 minutes. Then add a second If Time statement. Adjust the times in both If Time statements so you get a the second dose at the time you desire.

 

[iReefer2]

So would this work?

Fallback OFF
OSC 000:00/007:26/052:34 Then ON
If Time 11:30 to 16:59 Then OFF
If Time 17:30 to 10:59 Then OFF

Thanks for the help

 

[RussM]

Yes... that will give you doses at 11AM and 5PM

 

[woodnaquanut]

Please forgive the newbie question...

In the above why is the
If Time 11:30 to 16:59 Then OFF
statement not
If Time 12:00 to 16:59 Then OFF
??

-- Same thing for 17:30 vs. 18:00

It seems like the OSC line would take care of everything for the hour starting at 11:00. At 11am it would be on for 7min 26 sec then off for 52min 34 sec.


Dang these OSC statements are a brain teaser!

 

[RussM]

Please forgive the newbie question.

its a totally legit question. And it shows that you're thinking hard about it.

11:30 was probably picked just because it's a nice round number. In this case, the If Time xx:yy could be anywhere from 11:08 to 12:00 and still have the required effect. Similar for the other If Time statement. One advantage of using xx:30 in this case is that the dosing time could be increased up to being 30 minutes long without needing to also change the If Time statements.