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Type: Posts; User: Row1974

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  1. Thanks, I'm happy with it now I've determined the...

    Thanks, I'm happy with it now I've determined the calibration volumes by weight and results are as expected - less happy that I had to purchase microscales and I've used almost an entire bottle of...
  2. I used the digital scales accurate to 0.1ml -...

    I used the digital scales accurate to 0.1ml - reagent was off by 2.1ml - around 30%, sample was off by 1ml - around 2% - with the weighed calibration, results for reference fluid were 7.4, 7.5 and...
  3. I've ordered some scales accurate to 0.1ml so...

    I've ordered some scales accurate to 0.1ml so I'll post my findings here. I did a rough test with some kitchen food scales and it showed the reagent amount in ml when calibrating the doser to be 4ml...
  4. ok thanks for your help, someone on reef2reef...

    ok thanks for your help, someone on reef2reef suggested weighing the fluids rather than using a graduated measuring cylinder - going to try that first
  5. looking at the bottle yes, its almost half gone

    looking at the bottle yes, its almost half gone
  6. 80ml

    80ml
  7. Yes but it should be 7.5, 7.5, 7.5 and 7.5 (+/-...

    Yes but it should be 7.5, 7.5, 7.5 and 7.5 (+/- 0.2) - its consistent but it isnt within the tolerance of the reference solution so why would it be consistently high
  8. That's the problem, it isnt accurate versus a...

    That's the problem, it isnt accurate versus a brand new GHL KH reference fluid, I've now done 4 tests with the reference fluid 10.2, 10.1, 10 and 10.5
  9. KH Director reading too high - tried a lot of the known fixes

    Hi
    I've recently setup a KH Director and it is still reporting high dKH. Reports around 2-3 dKH higher than actual value. Here is what I have tried, some of it several times

    1. Measured and...
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