Apogee SQ-514 Manuale d'uso - Pagina 6
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SPECIFICATIONS
Power Supply
Current Draw
Output (Sensitivity)
Calibration Factor
Calibration Uncertainty
Output Range
Measurement
Repeatability
Long-term Drift
(Non-stability)
Non-linearity
Response Time
Field of View
Spectral Range
Spectral Selectivity
Directional (Cosine)
Response
Azimuth Error
Tilt Error
Temperature Response
Uncertainty in Daily Total
Detector
Housing
IP Rating
Operating Environment
Dimensions
Serial # 3354 and above
Dimensions
Serial # 0-3353
Mass (with 5 m cable)
Serial # 3354 and above
Mass (with 5 m cable)
Serial # 0-3353
Cable
Calibration Traceability
Apogee Instruments SQ-500 series quantum sensors are calibrated through side-by-side comparison to the mean
of four transfer standard quantum sensors under a reference lamp. The reference quantum sensors are
recalibrated with a quartz halogen lamp traceable to the National Institute of Standards and Technology (NIST).
± 5 % (see calibration Traceability below)
Less than 0.5 % (up to 4000 µmol m
Less than 1 % (up to 4000 µmol m
389 to 692 nm ± 5 nm (wavelengths where response is greater than 50 %)
Less than 10 % from 412 to 682 ± 5 nm (see Spectral Response below)
± 2 % at 45° zenith angle, ± 5 % at 75° zenith angle (see Directional Response below)
-0.11 ± 0.04 % per C (see Temperature Response below)
Anodized aluminum body with acrylic diffuser
-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m
5 m of shielded, twisted-pair wire; TPR jacket (high water resistance, high UV stability,
flexibility in cold conditions); pigtail lead wires; stainless steel (316), M8 connector
SQ-514
12 to 24 V DC
maximum of 20 mA
-2
-1
0.004 µmol m
s
per mA
-2
-1
250 µmol m
s
per mA
4 to 20 mA
Less than 2 % per year
Less than 1 ms
180°
Less than 0.5 %
Less than 0.5 %
Less than 5 %
Blue-enhanced silicon photodiode
IP68
30.5 mm diameter, 37 mm height
24 mm diameter, 37 mm height
140 g
100 g
-2
-1
s
)
-2
s
-1
)