Ultraflux UF 831, User Manual, Page: 40 / 109

40
NT UF 831 CO GB (b) / March 2014
4) Relative mode
Starting from the bottom, specify for each section the immersion percentage of the upper elevation and the
corresponding hydraulic coefficient, the elevation of the last section being 0 (surface of the channel or the
river).
Comment: By default, the breakdown of the hydraulic profile (into basic sections) proposed by the flow
meter copies the one recommended by the ISO 6416 standard concerning the ultrasonic flow measurement
in an open channel.
5.4.6 "Height / velocity (speed) settings" menu
1) Velocity profile in low water situation
When the level is below the lowest chord, the flow cannot be measured using ultrasound. It can however be
estimated using a linear interpolation curve with 4 points, or by self-learning (automatic regression).
Velocity
Height