Campbell Scientific NR01 Net Radiometer - Manual (Page 19)

NR01 Four-Component Net Radiation Sensor
FIGURE 4.1-1. NR01 with Reducer (P/N 21271) and Mounting Arm
TABLE 4.1-1. Recommendations for Installation of the NR01
Location Location of measurement should be representative of the total
surrounding area, in particular in case the NR01 is used for
environmental net radiation measurements. If possible, mount
the sensor on a separate pole at least 25 ft away from main
logger tower or tripod.
Mechanical
mounting A 2-axis leveling assembly is included as part of the sensor
mount which is suitable for a range of pipe diameters, max 27
mm or ¾ inch NPS.
Radiation
detection Avoid objects that cast shadows on the instrument.
Leveling Use the bubble-level to see if the instrument is mounted
horizontally For viewing the level, the radiation screens must
be removed. Alternatively a spirit level can carefully be put on
the pyrgeometer window.
Orientation By convention with the wiring to the nearest pole (so north in
the northern hemisphere, south in the southern hemisphere)
Height of
installation In case of inverted installation, a height of approximately 4 ft
(1.5 meters) above ground is recommended by the WMO (to
get good spatial averaging)
Tilt The NR01 should typically be installed horizontally, but for
some applications, may be installed in a tilted position. In all
cases, it will measure the fluxes that are incident on the surface
that is parallel to the sensor surface.
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