ADS Environmental Services FlowShark Pulse QR 775004 A1 - Manual (Page 160)

8-70 ADS FlowShark Pulse O&M Manual
Figure 8-117 Calculation – submenu
min. + max. value
This parameter defines the range within which the FlowShark Pulse will measure and
process flow velocity.
Set the minimum value below zero only when negative readings are
expected. It is impossible to measure and to record negative velocity
readings during negative flows if the minimum setting is 0.
Velocity h_crit
This table represents either the latest values obtained from depth and corresponding
velocity measurements or preset values (i.e., default values of 2.6 inches for h-critical
and zero for v-critical). If a reasonably reliable estimate of velocity is available at the
critical depth, enter this estimate as v-critical. Otherwise, the system will apply
values from the Manning-Strickler table to estimate the corresponding velocity when
depth drops below h-critical while the auto calculation function is in use (set to yes).
See Auto Calculation on page 8-71.
Leaving the default v-critical value at zero with the auto calculation function
disabled (set to no) will drop velocity to zero when depth is below h-critical.
Figure 8-118 Table of values for automatic Q/h relation