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Thread: Coordinate power head to turn on with DoS head

  1. #1
    Regular Vistor
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    Coordinate power head to turn on with DoS head

    Is it possible for me to couple the actions of a power head on my EB8 to the ON cycle of my DoS? I would like a power head to turn on 5 seconds before my DoS dispenses a solution, remain on for 5 seconds after the DoS is finished dispensing, and then turn off until 5 seconds before the next time that DoS head is scheduled to dispense.

    Thank you.

  2. #2
    Frequent Contributor zombie's Avatar
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    Not with the wizard unfortunately. The only way is with an OSC statement that triggers profiles in the DOS. The DOS treats running the wizard as ON as far as outlet statements are concerned.

    Sent from my SM-G965U using Tapatalk

  3. #3
    Regular Vistor
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    Got it. Thanks for the reply.

  4. #4
    Director, Customer Experience Paul's Avatar
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    Relatively pretty easy to do. Let's say this is my DOS Interval from my DOS (click on the gear when you are setting it up).

    Amount to dose: 5 mL
    Time allotted: 1422 min
    Time used: 100%
    Number of doses: 49
    Dose every: 29 min
    Volume per dose: 0.1 mL
    Volume of last dose: 0.2 mL
    Unused time remaining: 1 min
    Pump speed: 7 mL/min


    Essentially that means it will dose every 29 minutes. So... in my powerhead outlet I would program a device to turn on for 1 minute every 29 minutes. Using the OSC statement I would do the following.

    Fallback Off
    OSC 0:00/1:00/28:00 Then ON

    Why 28:00 instead of 29? Because my entire period is 29 minutes so (1+28=29)(check). This will cause this power head to run a bit longer than the dose pump, but likely this shouldn't be a big issue.

    hope that helps!

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