Apogee Instruments SU-200-SS Manuale d'uso - Pagina 12
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Sensor Calibration
The SU-200 has a standard UV calibration factor of exactly:
Multiply this calibration factor by the measured mV signal to convert sensor output to UV-A in units of W m
Calibration Factor (10 W m
Full Sunlight
-2
≈60 W m
UV-A
-2
10.0 W m
per mV
-2
per mV) * Sensor Output Signal (mV) = UV-A (W m
-2
10 W m
per mV * 6 mV = 60 W m
Example of UV-A measurement with an Apogee UV-A sensor.
Full sunlight yields UV-A radiation on a horizontal plane at the
Earth's surface of approximately 60 W m
output signal of 6 mV. The signal is converted to UV-A
radiation by multiplying by the calibration factor of 10 W m
per mV.
Sensor Output
6 mV
-2
)
-2
-2
. This yields an
-2
:
-2