Apogee Instruments SU-205 Manuel du propriétaire - Page 12
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Sensor Calibration
All Apogee amplified UV sensor models SU-202 and SU-205 have a standard UV calibration factor of exactly:
The following example uses the SU-202 calibration factor and expected response under full sunlight:
Calibration Factor (0.04 W m
0.04
Full Sunlight
-2
60 W m
UV-A
SU-202: 0.04 W m
SU-205: 0.02 W m
-2
per mV) * Sensor Output Signal (mV) = UV-A (W m
*
Example of UV-A measurement with an Apogee SU-202
sensor. Full sunlight yields UV-A radiation on a horizontal
plane at the Earth's surface of approximately 60 W m
yields an output signal of 1500 mV. The signal is converted to
UV-A radiation by multiplying by the calibration factor of 0.04
-2
W m
per mV.
Sensor Output
1500 mV
-2
per mV
-2
per mV
-2
)
1500
=
60
-2
. This