Apogee Instruments DLI-400, Руководство пользователя

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TROUBLESHOOTING AND CUSTOMER SUPPORT
Independent Verification of Functionality
Apogee DLI meters display the current PPFD measurement. A quick and easy check of meter functionality can be
determined by directing the sensor head toward a light source and verifying the sensor provides a reasonable
measurement. Increase and decrease the distance from the sensor head to the light source to verify that the
measurement changes proportionally (decreasing signal with increasing distance and increasing signal with
decreasing distance). Blocking all radiation from the meter should force the meter to zero

mol m
-2
s
-1
.
Unit Conversion Charts
Apogee DLI meters are calibrated to measure PPFD or ePPFD in units of µmol m
-2
s
-1
. Units other than photon flux
density (e.g., energy flux density, illuminance) may be required for certain applications. It is possible to convert the
PPFD or ePPFD value from a quantum sensor to other units, but it requires spectral output of the radiation source
of interest. Conversion factors for common radiation sources can be found on the Unit Conversions page in the
Support Center on the Apogee website (
http://www.apogeeinstruments.com/unit-conversions/ ; scroll down to
Quantum Sensors section). A spreadsheet to convert PPFD or ePPFD to energy flux density or illuminance is also
provided on the Unit Conversions page in the Support Center on the Apogee website
( http://www.apogeeinstruments.com/content/PPFD-to-Illuminance-Calculator.xls ).