Azbil MagneW Plus+ NNK140/941, User Manual

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Azbil Corporation Appendix
NNK-MagneW 3000 FLEX/PLUS Smart Electromagnetic Flowmeter Open channel Type Detector Appendix-
3
Water level calculation (Elbow flange type)
H
3
H
4
H
5
45 elbow
Gate
Example
Size and number of detector: 200mm, 1 unit
Size and number of dummy detector: 200mm, 1 unit
Maximum flow rate (Qt.): 500m
3
/h
Average flow velocity per detector (V): 2.21m/s
Water level calculation of head difference ( )
where : Water head conversion coefficient of the elbow flange: 0.055
Example: For a detector average flow velocity of 2.21 (m/s):
Elbow spouting height ( )
Where : Conversion coefficient of elbow spouting height: 0.028
Example: For a detector average flow velocity of 2.21 (m/s):
Nominal size 50mm 100mm 200mm
Dimension of
49mm 92mm 196mm
Consequently, THE head can be calculated as