Apogee Instruments SQ-644 소유자 매뉴얼 - 페이지 11
{카테고리_이름} Apogee Instruments SQ-644에 대한 소유자 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Apogee Instruments SQ-644 16 페이지. Quantum light pollution sensor
Apogee Instruments SQ-644에 대해서도 마찬가지입니다: 소유자 매뉴얼 (16 페이지)
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Sensor Calibration
Apogee SQ-644 Quantum Light Pollution Sensors have standard calibration factors of exactly:
Multiply the calibration factor by the measured mV signal to convert sensor output to photon flux density in units
of µmol m
-2
s
-1
:
Calibration Factor (12.5 µmol m
12.5
LED Output
(100 µmol m
12.5 µmol m
-2
-1
s
per mA) * Sensor Output Signal (mA) = Photon Flux Density (µmol m
*
-2
-1
s
)
Sensor Output
12 mA
-2
-1
s
per mA
(12 – 4)
Example of photon flux density measurement with an
Apogee model SQ-644 Quantum Light Pollution Sensor.
The LED in this example Full yields a photon flux density on
a horizontal plane of 100 µmol m
signal of 12 mA. This signal is converted to photon flux
density by subtracting the 4.0 mA offset and then
multiplying by the calibration factor of 12.5 mol m
mA.
=
100
-2
-1
s
. This yields an output
-2
-1
s
)
-2
-1
s
/