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Thread: Dosing issues - max values for flow and dose

  1. #1
    Join Date
    08.12.2021
    Posts
    26

    Default Dosing issues - max values for flow and dose

    Hi!

    I have a ~1L/min dosing pump (peristaltic pump) connected to one of my powerbase switches.

    I've calibrated it and it turns out to work at 1075 ml/min

    I've realized the max value for the pump flow rate is 1000ml/min.

    Similarly, I use this pump to pull 10L from the aquarium once per day (twice per day right now), but the max dose is 3000 ml.

    Why these limits? I understand these for GHL Doser but other types of pumps should have a wider range. The trick I've tried to use is setting it up to 107 ml/min and then dosing 1000 ml, i.e. applying a 1/10th scale. However that's very counterintuitive and easy to miss and cause a problem.

    Cheers,

  2. #2
    Join Date
    27.05.2015
    Posts
    2,352

    Default

    Less than 1% of users have a need for a limit higher than 1000ml/min flow rate.
    If you'd like to make a feature request, you may submit it to: wish@ghl-kl.de
    No support or warranty issues over PM!
    Please send PMs to the moderators only if you have general problems with using the forum! Thanks for helping us to keep the support efficient.

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    For support or warranty issues, create a support ticket by clicking here.

  3. #3
    Join Date
    08.12.2021
    Posts
    26

    Default

    Thing is that from a computing standpoint it seems like a totally arbitrary number. Since decimal points are supported in this field I'd assume it's stored as a float or double,which should support higher numbers, hence my question why that limit?

    I understand that the number of potential users is a metric worth considering, but it can't be the only one, specially for arbitrary limits that do not seem to be related to software constraints, are not informed to the user and not even validated by some of the UIs (i.e. GCC), resulting in error prone behaviours.

    E.g. less than 1% of the users will set a password starting with the letter Z in capital, but you would never set the system so it does not allow Z in the beginning of the password, as it would be arbitrary and not linked to a software limitation. Right?

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