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g) Battery.
h) To select a variable,
i). Use the up or down arrow key to view a
variable.
i) To accept the velocity measurement,
i). Press the Right Soft Key.
j) To
REDO
velocity measurement,
i). Press the Left Soft Key.
The conventions and graphic display features used for displaying Velocity and SNR raw
data are defined under
Properties associated with the variable output from the numerical calculations
performed on raw data collected is defined in
Variable
Samples
Total number of samples received.
Spikes
Number of spikes removed from mean velocity.
Mean X velocity component of all samples.
Vel
Velocity is despiked and mounting correction
applied (if applicable).
σV
Standard error of X velocity component.
Mean signal to noise ratio. Average of beam 1
SNR
and 2 SNR during point measurement.
Flow angle relative to X direction. Angle
Angle
between the mean X velocity component and
mean Y velocity component.
Mean wading rod angle during point velocity
Tilt
measurement.
Temp
Mean temperature during point measurement.
Bnd
Boundary QC value.
8.3.3.4
Review Station Measurement
Review Station measurement screen consist of tabular report and velocity distribution
plot supplied at the completion of all point velocity measurements at a station. The
variables supplied in the report are dependent on the features activated on the handheld,
velocity method selected and the discharge calculation method. The velocity distribution
plot gives graphical presentation of the point velocity measurements against theoretical
th
1/6
power law.
FlowTracker2 User's Manual (January 2019)
Raw Data
Display.
Table 8-8 - Review Point Measurement
Description
135
SonTek – a Xylem brand
Table
8:8,
Units
Decimal
number
n/a
number
n/a
m/s or ft/s
4
m/s or ft/s
4
dB
3
Degree
2
Degree
2
°C or °F
2
n/a
n/a
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