Apogee Instruments SQ-627 Owner's Manual - Page 8

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DEPLOYMENT AND INSTALLATION

Mount the sensor to a solid surface with the nylon mounting screw provided. To accurately measure photon flux

density incident on a horizontal surface, the sensor must be level. An Apogee Instruments model AL-100 leveling

plate is recommended for this purpose. To facilitate mounting on a cross arm, an Apogee Instruments model AM-

110 mounting bracket is recommended.

Nylon Screw: 10-32 x 3/8

Model: AL-120

Model: AL-110

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 0.5 %, 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.