Nortek Vectrino, User Manual

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Chapter 7
Test and Verification
You can change the setting if you upgrade in-situ using long cables. The
Vectrino verifies the received head file and firmware upgrade files before
they are allowed to replace the existing head and firmware files, hence,
using the wrong transmission speed will not cause trouble.
Transducers
1
Fill a bucket with water and a little dirt (as sound-scattering material).
2
Click Data collection > Start Data Collection . While the transducers
are in the air, the velocity measurement will look like random noise.
3
Immerse the transducers in the water, and observe the velocity, the
standard deviation, and the amplitude in counts. Note the change in the
graphical view of the velocity when the probe is lowered into the water.
In the air the graphs are noisy; in water they should be smooth.
The velocity in water (left part of
the graph) and in air (right part
of the graph).
Noisy velocity graphs:
If the
velocity graphs remain noisy
when the probe is immersed in
water, try varying the position of
the probe, or add some seeding
like dirt or small particles to the
water.
Probe Check
Designed to act as a measurement quality assurance tool, the Probe Check
function in the Vectrino software lets you inspect the region where the
Vectrino makes its measurements by showing how the signal varies with
range. You can use it to diagnose and correct problems and to optimize
data collection.