Campbell Scientific NR01 Net Radiometer - Manual (Page 18)

NR01 Four-Component Net Radiation Sensor
3.4 Dimensions
263 mm
027 mm (3/4 inch NPS)
FIGURE 3.4-1. Dimensions of the NR01 in mm:
(1) 2-Axis Leveling Assembly, (2) Mounting Arm
4. Installation
4.1 Installation
A 1” to ¾” pipe reducer fitting (P/N 21271) is used for mounting the NR01
onto a CM204 or CM206 crossarm. The crossarm can be mounted to any pole
with a 25-mm to 54-mm outer diameter. However, for most applications,
Campbell Scientific recommends attaching the crossarm to a CM310-series
pole so that the sensor is above vegetation. You can also mount the crossarm
to the tripod or tower that supports the datalogger’s enclosure.
To attach the pipe reducer to the sensor, loosen the leveling assembly’s Allen
bolts (8 in Figure 2.2-1). Insert the pipe reducer inside of the cup in the center
of the sensor (see Figure 4.1-1) and then tighten the Allen bolts so that they
grip the pole. Slightly loosen the two bolts at the opposite end of the tube
mount (4 in Figure 2.2-1) and rotate the sensor mount tube to level the sensor
in the two axes. Once the sensor is leveled, tighten all of the Allen bolts,
restricting further movement of the sensor.
Table 4.1-1 gives other general guidelines for the positioning and installation
of the sensor.
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