Repeatablity of flowmeter

  1. rollingstein

    rollingstein 636
    Gold Member

    Can a flow meter whose scale has graduations only 2 units apart (e.g. 90,92,94,96,98,100) have a legitimate advertised repeatablity of 0.5% of the Full Scale?

    The scale runs 0 to 100 so that'd mean readings repeatable within 0.5%. When marks itself are 2 units apart how does this make sense?

    In particular, I was referring to this instrument:
  2. jcsd
  3. Integral

    Integral 7,288
    Staff Emeritus
    Science Advisor
    Gold Member

    That means that for a given flow, the bob will always return to within .5% the same spot every time. Not sure how the spacing of the scale lines could possibly effect that.
  4. rollingstein

    rollingstein 636
    Gold Member

    In the sense, if you do not have a fine enough spacing of scale lines how do you know it returned to the same spot or how close to the same spot.

    I guess an external mark, but to a user of the instrument isn't any repeatablity less than the minimum scale graduation a lost metric. How can he use it?
Know someone interested in this topic? Share this thead via email, Google+, Twitter, or Facebook

Have something to add?

Draft saved Draft deleted
Similar discussions for: Repeatablity of flowmeter