Repeatablity of flowmeter

  • #1
rollingstein
Gold Member
646
16
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:

http://www.omega.com/Green/pdf/FL1500.pdf
 

Answers and Replies

  • #2
Integral
Staff Emeritus
Science Advisor
Gold Member
7,201
56
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.
 
  • #3
rollingstein
Gold Member
646
16
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.

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?
 

Related Threads on Repeatablity of flowmeter

  • Last Post
Replies
18
Views
11K
  • Last Post
Replies
2
Views
1K
Replies
2
Views
3K
Replies
1
Views
937
  • Last Post
Replies
10
Views
2K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
3
Views
10K
  • Last Post
Replies
3
Views
2K
Top