CMP3 Pyranometer
7
If this is not possible, try to choose a site where any obstruction over the
azimuth range between earliest sunrise and latest sunset has an elevation not
exceeding 5°. Diffuse solar radiation is less influenced by obstructions near the
horizon. For instance, an obstruction with an elevation of 5° over the whole
azimuth range of 360° decreases the downward diffuse solar radiation by only
0.8%.
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.
7.2 Mounting to an Instrument Mount
7.2.1 Required Tools
Tools required for installation on a tripod or tower:
Small and medium Phillips screwdrivers
8 mm (5/16 in) and 12 mm (1/2 in) open-end wrenches
4 mm (5/32 in) Allen wrench
Tape measure
UV-resistant wire ties
Side-cut pliers
Compass
Step ladder
7.2.2 Mounting Procedure
The CMP3 is typically mounted to a tripod or tower using the CM225 solar
sensor mounting stand. For information about mounting the CMP3 to another
mounting stand, refer to the Solar Radiation Sensor Mounts manual.
Mounting the CM225 to a crossarm avoids reflections from
the vertical pipe onto the sensor.
1. Mount the crossarm to the tripod or tower.
CAUTION
