For the
SDIAddress
, alphabetical characters need to be enclosed in quotes (for example,
“A”
).
Also enclose the
SDICommand
in quotes as shown. The
Destination
parameter must be an
array. The required number of values in the array depends on the command (see
12)).
FillNAN
and
WaitonTimeout
are optional parameters (refer to CRBasic Help for more
information).
7.3 Siting
Mount the sensor so no shadows or reflections will be cast on it at any time of day from
obstructions such as trees, buildings, or the mast or structure on which it is mounted. For the
lower sensors, 99% of the input comes from a circular area with a radius of ten times the
mounting height. For example, if the instrument is mounted 6 m above the surface, 99% of the
input of the lower sensors comes from a circular area with a 60 m radius.
To avoid shading or reflection effects and to promote spatial averaging, the SN500SS should be
mounted at least 1.5 m (5 ft) above the ground or crop surface. Campbell Scientific recommends
that the SN500SS be mounted to a separate vertical pipe at least 7.6 m (25 ft) from any other
mounting structures.
The sensor should be mounted with the cable pointing towards the nearest magnetic pole. For
example, in the Northern Hemisphere, point the cable toward the North Pole.
7.4 Mounting
The SN500SS mounting kit secures the sensor directly to a vertical pipe, or to a CM202, CM203,
CM204, or CM206 crossarm. Mount the sensor as follows:
1. Attach the mounting rod to the SN500SS (
(p. 9) and
SN500SS Net Radiometer
8
