Apogee Instruments PYRANOMETER SP-421 Panduan Pemilik - Halaman 9
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9
DEPLOYMENT AND INSTALLATION
Mount the sensor to a solid surface with the nylon mounting screw provided. To accurately measure PPFD incident on a
horizontal surface, the sensor must be level. An Apogee Instruments model AL-100 Leveling Plate is recommended to level
the sensor when used on a flat surface or being mounted to surfaces such as wood. To facilitate mounting on a mast or pipe,
the Apogee Instruments model AL-120 Solar Mounting Bracket with Leveling Plate is recommended.
Nylon Screw: 10-32x3/8
Nylon Screw: 10-32x3/8
Model AL-120
Model AL-100
To minimize azimuth error, the sensor should be mounted with the cable pointing toward true north in the northern
hemisphere or true south in the southern hemisphere. Azimuth error is typically less than 1 %, but it is easy to minimize by
proper cable orientation.
In addition to orienting the cable to point toward the nearest pole, the sensor should also be mounted such that
obstructions (e.g., weather station tripod/tower or other instrumentation) do not shade the sensor. Once mounted, the
green cap should be removed from the sensor. The green cap can be used as a protective covering for the sensor when it
is not in use.