The unique design of the CSD 1 incorporates three photo-diodes of equal sensitivity, of which one photo-diode continuously measures the global sky irradiance (direct sun + diffuse sky irradiance) at all times. The remaining two photo-diodes measure a portion of the diffuse sky field only. The built-in electronics of the CSD 1 subtracts the acquired diffuse sky signal level from the global, to derive the direct solar irradiance signal level. The CSD 1 offers two output signal possibilities; a logic high/low output level (> 120 W/m2 = high logic), or a second milli-volt output signal level, that is proportional to the derived direct solar irradiance signal. The CSD 1 is intended to be used in conjunction with a data acquisition system, or (integrating) voltmeter.
Benefits
No mechanical realignment due to season change (one time setup)
No moving parts
Year-round high accuracy
Suitable for any latitude/longitude position on Earth
Dew, frost, ice deposition prevention (via built-in resistive heating option)
Wide operational temperature range |
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845 9000 601 Fax +44 (0) 845 9000 602
info@omniinstruments.co.uk
Tel +1-866-849-3441
Fax +1-866-628-8055
info@omniinstruments.net
Tel +61 (0)282 442 363 Fax +61 (0)294 751 278 info@omniinstruments.com.au
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