Endress+Hauser Prosonic S FMU90 - British Standard Triangular Weirs (BS 3680)

Appendix
195
13.1.12 British standard triangular weirs (BS 3680)
L00-FMU90xxx-05-00-00-xx-011
!
Note!
After selecting the type of weir, Q
max
can be adjusted to the flow conditions. Q
max
defines the flow
at which the output current is 20 mA.
Type of weir α H
max
[mm] Q
max
[m
3
/h]
BST V-Weir 22,5 (1/4 90°) 1/4 90 ° 390 120,1
BST V-Weir 45 (1/2 90 °) 1/2 90 ° 390 237,0
BST V-Weir 90 90° 390 473,2
kk
45°
BD
≥ 3H
max
≥ 2H
max
H
max
≥ 2H
max
k3mm ≈
α