Sequoia LISST-SL, Руководство по эксплуатации

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LISST-SL V2.1
User’s Guide
39
Final Purge
Checking Velocity Functionality
to adapt it to the pitot). Do not introduce
any air in the tubing to the pitot cap.
Raise the free end of the tubing above
the water surface between 0.5 to 1
meter above the water surface. Plug in
the power cable from the TCB to the SL
sensor. Turn on the TCB. When the
data light on the TCB is blinking, the
audible clicking sound from the LISST-
SL is the solenoid activating. Any
bubbles that were in the system should
escape within 15 minutes.
As a quick check of the velocity sensor,
a measured head can be applied to the
pitot and the results viewed on the TCB.
Set the column of water in the tubing at
30 cm (12 inches) above the water
surface. Select the Measure mode on
the TCB. The velocity should be
approximately 2.4 m/sec (8 ft/sec).
Lower the column water to 7 cm (3
inches) and the velocity should be
approximately 1.2 m/sec (4 ft/sec). This
verifies that the pitot tube system is
functioning properly.
Turn off the TCB. Remove the tubing
and put a plastic cap or a short tube
with a pinch clamp on the pitot. Put a
rubber band around the sensor over the
static ports. The pitot tube system is
now ready for deployment. If for some
reason the sensor is operated in air
without caps on the pitot tube system, a
meter length of tubing filled with water
can be attached to the pitot nozzle and
purged for 15 minutes at the
deployment site.