National Semiconductor • SolarMagic Weather Station User Guide
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To measure the module or array irradiation, ensure that the sensor is
placed on a level surface, use the alignment bolts to adjust the sensor
until it is level. Once the leveling alignment bolts are adjusted and
tightened then the irradiation sensor can be mounted at the same
angle and orientation as the PV modules. It is important the
irradiation sensor is mounted at the same angle and orientation in
order to determine the expected production of the PV system.
To measure global irradiation, mount the sensor on a level surface and
use the alignment bolts to adjust the sensor until it is level. Once the
leveling alignment bolts are adjusted, tighten them.
Remove the red cap to begin taking readings.
NOTE:
Calibration
Calibration should be confirmed annually. Refer to Chapter 6 for calibration
procedures.
4.1.6
Installing the Wind Speed Sensor
The sensor is a two-wire sensor using the red wire for power and the
black wire for the output signal.
WARNING:
Do Not Connect When Energized
Do not connect the sensor wire if the communications module is energized.
The sensor comes with a stainless steel elbow that can be mounted on
a 1” outside diameter tube. For best results ensure that the sensor is
mounted parallel to the ground surface located over open level terrain.
To measure the wind exposure of the PV array, National
Semiconductor recommends the wind sensor be installed in the
middle of the array at array height.
To measure the site wind conditions National Semiconductor
recommends the wind speed sensor be installed at a distance from
obstructions that is equal to five to ten times the height of nearby
buildings, trees, or other obstructions. For example if a parapet wall is
three feet higher than the wind sensor, then the wind sensor should be
installed 15 to 30 feet from the parapet wall.
The height over ground depends on the application and applicable
standards.
Z
Summary of Contents for SolarMagic
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Page 33: ...Appendix A Reference Diagrams 27 Appendix A Reference Diagrams...
Page 34: ...National Semiconductor SolarMagic Weather Station User Guide 28 A 1 1 Sensor Terminal Blocks...
Page 35: ...Appendix A Reference Diagrams 29 A 1 2 Communications Power Terminal Block...