Flowlink 5.1 Software Instruction Manual - Isco

Isco Flowlink 5.1 ® Software
Menu Commands
Graphs>Profile
Cross Section
Graphs>Velocity
Graph
Graphs>Velocity
Vectors
Graphs>Amplitude
Selecting the Graphs>Flow Profile>Profile Cross Section menu
option or clicking the Flow Profile button displays a
hydrograph and color contour plot of the flow profile. The Y-axis
represents channel height, and the X-axis represents channel
width. Velocity is represented by different colors.
Selecting the Graphs>Flow Profile>Velocity menu option or
clicking the Velocity Graph button shows the raw Dopplerbased
velocity components measured by each individual beam.
Selecting the Graphs>Flow Profile>Velocity Vectors Graph menu
option or clicking the Velocity Vector Graph button displays
these raw measurements in an XYZ coordinate system to
produce the Vector profiles shown in the XYZ graph.
NOTE: Both the Velocity and Vector graph functions give
niformation about the quality of the ADFM sensor installation
and alignment. In a perfect installation, Beams 1 and 3, and 2
and 4, will be equal in amplitude and opposite in sign. Beams 2
and 4 will be approximately 50% greater in amplitude than 1
and 3.
Selecting the Graphs>Flow Profile>Amplitude Graph menu
option or clicking the Amplitude Graph button shows a
graphical display of the received signal strength. The amplitude
normally decays from a high value near the sensor (bottom of
graph) to a lower value at the end of the profile range (near top of
graph). Large spikes should be expected where the beams hit the
water surface.
Graphs>Correlation
Selecting the Graphs>Flow Profile>Correlation Graph menu
option or clicking the Correlation Graph button shows a
measure of the quality of the processed velocity information.
Lower correlation values (e.g., below 100) are an indication of
poor quality data. Higher correlation values (e.g., above 150) may
indicate external interference or the presence of an acoustic
barrier (such as the surface).
Utilities Command
For the Utilities menu options to be active, you must first have a
database open. The Utilities menu contains the following choices:
• Options: Displays the options window that contains the
default settings for Flowlink operations.
• Flow Conversions: A complete listing of flow conversion
methods stored in the database.
• Merge Sites: Allows you to merge site data.
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