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Thread: Scale accuracy

  1. #1
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    Scale accuracy

    Just a question on the accuracy of scales that people use. After looking around I found a set at BigW, these were 5kg but only had a accuracy of 0.1g . Should I look at 0.01g accuracy? Ebay has scales that are only 100/.01g. Now I would think when doing larger batches the 5 kg would be better. Although the smaller scales would be better, for tests batches. Any thoughts / advice before I buy.
    Thanks all Carolinefficeffice" />>>

  2. #2
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    ลึก ประเทศอินเด&
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    Re: Scale accuracy

    Hello Cass

    I think an accuracy of 0.1g is more than sufficent for anything you are likely to need for biodiesel production or backyard testing.
    Last edited by tillyfromparadise; 14th May 2007 at 11:04 PM.

  3. #3
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  4. #4
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    Re: Scale accuracy

    Quote Originally Posted by cass View Post
    Just a question on the accuracy of scales that people use. After looking around I found a set at BigW, these were 5kg but only had a accuracy of 0.1g . Should I look at 0.01g accuracy? Ebay has scales that are only 100/.01g. Now I would think when doing larger batches the 5 kg would be better. Although the smaller scales would be better, for tests batches. Any thoughts / advice before I buy.
    Thanks all Carolinefficeffice" />>>
    0.1g from Woolies? You mean 0.1kg don't you?
    1990 HZJ80

  5. #5
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    Re: Scale accuracy

    Quote Originally Posted by marki View Post
    0.1g from Woolies? You mean 0.1kg don't you?
    no it does say 0.1g, will check it again. This time I will open the box and read instructions to make sure it is right.

  6. #6
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    Re: Scale accuracy

    Quote Originally Posted by cass View Post
    no it does say 0.1g, will check it again. This time I will open the box and read instructions to make sure it is right.
    Well, 0.g is plenty sensitive - how much does it cost?
    1990 HZJ80

  7. #7
    Join Date
    Aug 2006
    Location
    Southern Sydney
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    498

    Re: Scale accuracy

    Cass,

    Depending on your processor batch size, the majority of weights that you will be weighing will be above 400gms. At that weight, 1 gram accuracy is all you will need.
    eg a 100 litre tank can process 75 litres of VO plus 15 litres of Methoxide with room for a 5% pre-wash and 5 litres of headroom. Using KOH, you would need to measure 600gms for the 8g/L base, add titration, say at 3, gives you 825gms.

    The only time you measure less than 10gms is when you make up titration fluid or do 1 litre test batches.
    George

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