Campbell SnowVUE 10, Product Manual

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CAUTION:
The SnowVUE 10 calculates distance readings using the speed of sound at 0 °C (331.4 m/s). If
the temperature compensation formula is not applied or manually specified using the
XWT!
command, the distance values will not be accurate for temperatures other than 0 °C.
Downloadable example programs are available at
www.campbellsci.
eu
/downloads/snowvue10-example-programs .
7.3 Beam angle
When mounting the SnowVUE 10, the beam angle needs to be considered. Mount the SnowVUE
10 so that the face of the transducer is perpendicular to the intended target surface. The
SnowVUE 10 has a beam angle of approximately 30 degrees, which means that objects outside
this 30-degree beam will neither be detected nor interfere with the intended target. Any
unwanted target must be outside the 30-degree beam angle.
Determine the required clearance for the beam angle using the following formula and Figure 7-1
(p. 10).
Clearance radius formula:
CONE
radius
= 0.268(CONE
height
)
where
CONE
height
= distance from ground surface to base ( Reference point [p. 11])
CONE
radius
= clearance radius in the same measurement units as the CONE
height
Figure 7-1. Beam angle clearance
SnowVUE 10 Sonic Ranging Sensor 10