Variable speed dosing pumps

[ckhorne]

Would it be possible to use a variable speed peristaltic pump on the 1-10V output? I would like to use it to drive my calcium reactor continuously, but be able control the feed rate. I have a 4-way dosing pump, but I'm afraid the 60mL/min won't be enough (I still don't have everything hooked up, so I don't know exact rates yet).

I'm thinking about using something like this pump, which accepts 1-12v.

I could build a voltage divider ciruit to match 1-10v to 1-12v, but I can't find specifications for allowed power draw for the 1-10v interface, and I doubt it will allow 1.6 amps....

 

[ckhorne]

Well, duh. Nevermind - I just read the datasheet- the unit I linked requires separate power and 0-5VDC control, which works out perfectly - I'll just drop down the 1-10V to 0-5V with a voltage divider, and control it that way.

I'll post back here if I end up going this route.

 

[punkrockdad]

you can set the control voltage inside the profilux - i change it to 2-10 for the tunze's.
Not sure about 0 though...

 

[AQD_ottawa]

Tunze is recommended at 3-8V

 

[punkrockdad]

really? I was under the impression the tunze controller was rated at 2-10. Or at least the one in the LFS was.

What will happen with the wrong rates?

 

[punkrockdad]

BOOM!!

 

[Matthias Gross]

You can only draw some mA from the 1-10V-interface

This is a control signal, not a power output.

@punkrockdad: no damages happen but the output signal of the ProfiLux should fit to the input signal of the Tunze driver