Doser 2.1 Calibration issues

Discussion in 'GHL Advanced Technology' started by reeferfoxx, Feb 23, 2018.

  1. reeferfoxx

    reeferfoxx Valuable Member R2R Supporter Reef Squad R2R Excellence Award Build Thread Contributor

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    Just purchased the 2.1 and before I updated the firmware to 1.28, I was running 1.27. I was playing around with the settings and calibration to get familiar. To say the least I was impressed and found that calibration was easy and accurate.

    That said, after updating the firmware to 1.28, I reset the settings and decided to get thing rolling for real. Went to calibrate at the fasted setting, it's starting point was 12 ml/min. I ran the calibration on the fastest setting and the end result was 39 ml/min. I changed the deviation and tested a dose of 20ml. The result was 21ml.

    So, I calibrated again. Same thing. 21ml. So I entered 10ml and it dosed 11ml.
    Calibrating the 3rd time, I wrote 40ml/min instead of 39ml. Ran a dose of 20ml and again it came out to 21ml.

    Am I doing something wrong?
     
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  2. Marco@GHLUSA

    Marco@GHLUSA GHL Team R2R Supporter Platinum Sponsor

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    If all you’re dosing is 20mL, I would run at a lower speed. Longer runtime will yield a better calibration.
    How are you calibrating; what are you using to measure your effluent with?

    Generally speaking, unless I do ATO, I almost always run at speed 0.
     
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  3. reeferfoxx

    reeferfoxx Valuable Member R2R Supporter Reef Squad R2R Excellence Award Build Thread Contributor

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    Thank you so much for the fast response! I'll give it a shot at lower speeds.

    I'm using a Labstock 100ml glass graduated cylinder.
    download.jpg
     
  4. Marco@GHLUSA

    Marco@GHLUSA GHL Team R2R Supporter Platinum Sponsor

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    If you have a scale that can read down to to 0.1g’s then you can try that as well
     
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  5. reeferfoxx

    reeferfoxx Valuable Member R2R Supporter Reef Squad R2R Excellence Award Build Thread Contributor

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    I do!!

    Got it calibrated perfectly! Thank you! I did 20ml and 20.1ml and the scale didn't lie! Much appreciated thank you! :D
     
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  6. Marco@GHLUSA

    Marco@GHLUSA GHL Team R2R Supporter Platinum Sponsor

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    I’ve ordered and received a few graduated measuring beakers/vessels just like yours above. Most of them weren’t accurate! Of course the ones I ordered didn’t come from laboratory supply vendors, rather from the amazing bookstore ;)
     
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  7. reeferfoxx

    reeferfoxx Valuable Member R2R Supporter Reef Squad R2R Excellence Award Build Thread Contributor

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    I was worrisome about it. I wouldn't have been offended if you told me it wasn't accurate. What is funny is I always use a scale to measure dry goods for dosing. Not sure why that didn't cross my mind to begin with. ;Facepalm;Bucktooth Thanks again!
     
  8. Brew12

    Brew12 Electrical Gru Staff Member Team R2R R2R Supporter Reef Squad Leader R2R Excellence Award Partner Member 2019 Reef Tank 365 Build Thread Contributor Article Contributor North Alabama Reef Club

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    I'm glad to see this. I ran the calibration on Fast and came up with 37ml. I had no idea if that was in the ballpark or not. I'm just dosing Kalkwasser so I'm not horribly worried about accuracy yet.
     
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  9. reeferfoxx

    reeferfoxx Valuable Member R2R Supporter Reef Squad R2R Excellence Award Build Thread Contributor

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    Just in case you are, this thing is precise! Once calibrated, it's good to 1/10th a ml. Best purchase I've made thus far :)
     
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  10. Brew12

    Brew12 Electrical Gru Staff Member Team R2R R2R Supporter Reef Squad Leader R2R Excellence Award Partner Member 2019 Reef Tank 365 Build Thread Contributor Article Contributor North Alabama Reef Club

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    I have to say I am loving my GHL stuff.
     
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