Ultrasonic Wind Speed and Direction Smart Sensor (S-WCG-M003) Manual
1-800-LOGGERS 3
www.onsetcomp.com
because it can generate upwards turbulence that will
affect the sensor measurements.
•
You may mount the sensor on a wooden post.
•
Mount the sensor in a location that receives direct sunlight
for several hours a day to ensure the built-in solar panel is
charged regularly. Make sure the sensor is positioned in
the sun and not under the forest canopy or obstructions.
•
The sensor must be aligned to true north when mounted
to ensure accurate wind direction readings. Use the
alignment tool as described
North Alignment
.
•
If the sensor is mounted on the same mast as a rain gauge,
mount the wind sensor away from the rain gauge on a half
cross arm (M-CAB) so that the wind sensor does not
interfere with rainfall measurements. If there is no rain
gauge on the same mast, mount the wind sensor directly
to the top of the mast.
•
The tripod or mounting mast must be properly grounded.
For field installations, you can use Onset’s Grounding Kit
(M-GKA).
•
If the station is deployed in an area subject to frequent
thunderstorms, installing a lightning rod nearby can
reduce the risk of damage.
•
To minimize measurement errors due to ambient RF, keep
the sensor cable as far as possible from other cables
carrying high frequency or high-current signals.
•
After the sensor is mounted on a mast, secure the smart
sensor adapter to the mast with the cable ties as shown.
Multiple smart sensor adapters can be stacked as shown
in the example below on the right.
Alternatively, mount the smart sensor adapter to a flat
surface using two screws (no larger than a #6) and two
washers as shown in the example below.
•
Secure the sensor cable with cable clips or weather
resistant cable ties to protect it from damage in the wind.
Place clips or cable ties approximately every 1 to 1.6 m (3
to 5 ft). Do not use metal staples to secure the cable as
they can cut the cable.
•
Secure the mast that the sensor is mounted on so that it
does not vibrate. If you are using an Onset mast or tripod,
secure it with guy wires.
Mounting on a Mast
Follow these instructions for mounting the sensor on a tripod
or mast. The mounting U-bolts included can be used for
mounting the sensor on a mast or tripod with an outside
diameter ranging from 35–48 mm (1.38–1.89 inches).
1.
Connect the battery if you haven’t already done so (see
Connecting the Sensor Battery
).
2.
Place the mounting U-bolt around the mast and slide the
bracket over the threaded U-bolt ends as shown in this
example. Make sure the flat part of the bracket is facing
out.
3.
Repeat step 2 with the other U-bolt and bracket.
4.
Insert the ends of the U-bolts through the four holes in the
square sensor base at the bottom of the sensor rod. Loosely
install the hex nuts on the four bolt ends with a 10 mm
wrench.
Smart sensor
adapter secured
with cable ties
One of four hex nuts
installed
Mounting base at
the bottom of the
sensor
One Smart Sensor
Adapter Mounted
Mounting
U-bolts
around
mast
Two Smart Sensor
Adapters Stacked
and Mounted
Mounting
bracket
Mounting
bracket
Mounting
bracket, flat
side facing out