Configuration and Activation 4-35
Backward Bidirectional Choose this option when the
AV|Gated Sensor is installed facing downstream and to
ensure the monitor analyzes flows moving both away from
and toward the face of the sensor. This option would be
beneficial, for example, when using a weir to measure
overflows with the potential of river intrusion.
z Minimum Velocity Select the minimum expected velocity
that may occur at the site for the monitor to use in fine-tuning
the velocity data. The default setting is 0.05 and should be used
in most instances. The monitor compares the Minimum
Velocity value to the actual velocity readings before storing to
the monitor memory. Any actual velocity reading falling within
a plus or minus range of zero using the Minimum Velocity
value will be set to zero. For example, using a Minimum
Velocity of 0.05, and getting an actual velocity reading of -
0.03 causes the monitor to store a velocity reading of 0. Using
a Minimum Velocity of 0.05 and getting an actual velocity
reading of 0.06 causes the monitor to store a 0.06 velocity
reading.
z Maximum Velocity Select the maximum expected velocity
that will occur at the site for the monitor to use in fine-tuning
the velocity data. The default setting is Auto, which serves to
optimize the range and resolution of the velocity data samples
to match the characteristics of the flow.
z Data Acquisition Select the length of time to allow the
monitor to get a velocity reading. The default of Auto should
be used in most instances. Use Low to shorten the length of
time or use Medium or High to increase the amount of time.
Using Medium or High results in smoother velocity data but
also requires extra battery consumption.
z Store Data Select this checkbox to ensure the monitor logs
the velocity data to memory. This option is selected by default.
z Enable Scrubbing Select this checkbox to ensure the
monitor confirms questionable or erroneous velocity readings
based on the historical relationship between the ultrasonic
depth and velocity data for the location.
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