ADS Environmental Services FlowShark QR 775002 A4 - Manual (Page 143)

Configuration and Activation 6-17
 Bidirectional Choose this option to enable the monitor
to properly log reverse flow when it occurs at the
monitoring point.
 Forward Choose this option to read only positive flows
when the sensor is positioned to fire upstream (sensor
crystals facing upstream).
 Backward Choose this option to read downstream flow
when the sensor is installed in the outgoing line and
positioned in the opposite direction to fire downstream
(sensor crystals facing downstream). For example, this
option may be used when two pipes converge, and the
sensor is installed in the single outgoing line.
 Backward Bidirectional Choose this option to read
both downstream and reverse flows when the sensor is
installed in the outgoing line and positioned in the opposite
direction to fire downstream (sensor crystals facing
downstream). For example, this option may be used when
a weir is installed to measure overflows that may
experience river intrusion.
 Max Velocity Select the appropriate option from this drop-
down list to fine tune the maximum velocity value at the
selected monitoring point for greater accuracy in the velocity
data. An Auto option is available that allows the monitor to
dynamically modify the optimal maximum velocity based on
the current velocity readings to enhance the precision in
processing velocity data. It can read velocities up to 30 feet per
second (fps). However, ADS recommends using a fixed value
for monitoring points that typically remain dry, such as
overflows or sites downstream from pump stations. For these
applications, consider choosing the 10 or 15 fps option,
particularly where a sudden surge of flow traveling at more
than 3 fps can occur within a single interval.
 Sample Duration Select the duration of time for the sensor
to fire based on the noise present at the location. This interval
should increase with elevated noise levels. ADS recommends
restricting the selected interval between 3 and 8 seconds.