Endress+Hauser Prosonic S FMU90 - Page 200

Appendix
200
British standard triangular weirs (BS 3680)
Type Q
max
[m
3
/h] α β γ C
BST V-Weir 22,5 120,1 2,314 2,649,000 0,1430720 0,0000590
BST -Weir 45 237,3 2,340 2,610 0,2659230 0,0000880
BST V-Weir 90 473,2 2,314 2,650 0,1904230 0,0001980
Triangular weirs according to French standard NFX
Type Q
max
[m
3
/h] α β γ C
NFX V-Weir 30 375,9 2,400 2,800 0,0241095 0,0000616
NFX V-Weir 45 573,1 2,476 0,000 0,0000000 0,0000757
NFX V-Weir 60 793,1 2,486 0,000 0,0000000 0,0000983
NFX V-Weir 90 1376,7 2,491 0,000 0,0000000 0,0001653