Doser 2.1 minimum dose?

[Dave-T]

What is the minimum amount you can dose? According to this:

What is Minimum dosing capability on Doser 2.1? [Archive] - GHL Support Forum

Is there a minimum dose amount that can be completed at the different speeds? It looks like 0.1 ml is lowest that can be completed at any speed and the unit automatically rounds it to the nearest 0.1 place. Is 0.1 really achievable at any speed?

forum.aquariumcomputer.com

it's .1ml. But if I enter less than 1ml, it won't let me save a dosing schedule. I want to use it to dose trace elements in tiny quantities, 1ml is too much.

 

[Gaël]

Hello,

You can of course dose 0.1ml.
Please open a support ticket so that we can look into it.
https://www.aquariumcomputer.com/support/tickets-enquiries/ (Guest login)

Gaël

 

[Dave-T]

It's working now, it will let me enter .1ml. I don't know what I did to get it to start working, it definitely wouldn't take .1 in that field when I posted the question.

So is .1ml the actual amount that is the minimum dose? I'd like to dose amounts like .24 ml. If it doesn't support that level of granularity, I think I can make it work by dosing an extra ml every 5 days, etc...

 

[Gaël]

Super,
thanks for the feedback.
Yes, it's 0.1ml minimum in 0.1ml steps.

Gaël

 

[Dave-T]

Ok, actually - how do I do this? Say I want to dose 0.2ml every day except every 5th day dose 0.3ml. Is this possible?

 

[Gaël]

In this case, create an individual dosing schedule instead of an automatic one.
Gaël

 

[Lasse]

Its not really as easy as that. What you need is to use 3 pump functions (2 "virtual" - 1 real), 1 Programming language and one "virtual" switch.

Example you want to dose as you say 0.24 ml. As an example - I will dose 0.2 every day and an extra 0.2 every day 5 (0.2/5 = 0.04)

1

Calibrate your real pump function (the one that you have knit to a physical pump) let it say it is dosing function 5 and result in 4 ml/minute at speed 0.
Let us say you use 1000 ml container and going to use switch channel 64 as your "virtual" switch.
Configure it like this Dos 5 - no schedule needed. Dos 31 and 32 as follow - "virtual pumps" with schedule. All pumps should have the calibration figure you get from the calibration you did with the "real" pump (pump function 5 in my example) I use GCC because its easier to see the differences. Pump 5 (real) - answer to switch index 64, Pump 31 (virtual) answer to program every 1 day, pump 32 (virtual) answer to program every 5 days, See red, blue and black markings Do not forget to save

Now we configure a PL - in my case PL1 and press ok - do not forget to save

Now we create the "virtual " Switch channel 64 - the one that your real pump should answer to. Press OK and Do not forget to save

Sincerely Lasse

 

[Dave-T]

Perfect. Thanks Lasse! I thought of using timers, but then realized that they don't have second level granularity.

 

[Dave-T]

@Gael - I'm playing with this a little more and was able to reproduce the problem again. When I first configured a virtual dosing pump, I had the same issue. It wouldn't let me add .1 as a dosing amount. After a bunch of clicking in and out without changing anything, it again started working. However I found another issue. When entering in an amount under "Automatic times", it will let me enter .1. But it won't let me add that under "individual times". However, individual times will let me add 0.1. It wants the leading zero.

 

[Lasse]

European standards are normally to use 0.xxx not only .xxxx

Sincerely Lasse

 

[Dave-T]

Yes, well it's still a legitimate way to enter a number, so it's confusing. And it shouldn't accept it one way in one place and differently in another.