Teledyne TIENet 360 LaserFlow Ex, Installation And Operation Manual

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TIENet™ 360 LaserFlow™ Velocity Sensor
Section 4 Setup with 2160 LaserFlow Module
4-17
4.2.5 350 Velocity (Optional)
If your system includes the optional submerged functionality or
redundant measurement, it is also capable of measuring velocity
with a continuous wave Doppler sensor.
In the case of the submerged functionality, measure the distance
between the bottom of the channel and the face of the pressure
transducer (bottom of the LaserFlow) to obtain the initial value
for 350 Level.
Figure 4-15 350 Velocity Measurement tab in Flowlink
The
Positive Velocity
setting, when set to “true”, the LaserFlow
will not attempt to determine flow direction and negative
readings are discarded in the average velocity calculation.
Selecting this setting will save power. This setting is set to “true”
by default.
The
350 Advanced Settings
are pre-programmed into the
sensor. However, if your application requires the addition of any
correction factors, the Advanced button opens the Advanced set-
tings window (refer to Figure 4-16).
Input velocity coefficients can be adjusted for A, B, and C, where:
V = A (offset) + B*(Measured Velocity) + C*(Measured Velocity)
2
Coefficient A is an additive offset value to correct the Measured
Velocity for any additive bias. The value for A must be expressed
in units of meters/second.
Coefficient B is a multiplicative scalar for correcting the Mea-
sured Velocity for any linear multiplicative bias. The value for B
is unitless.
Coefficient C is another scalar to correct the Measured Velocity
for any nonlinear bias. The value for C must be expressed in
units of seconds/meter, so that the resulting value for the
Reported Velocity Reading will be in units of meters/second.