Apogee Instruments S2-441 Руководство пользователя - Страница 6
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Печатать страницуSPECIFICATIONS
Power Supply
Average Max Current Draw
Calibration Factor (reciprocal
of sensitivity)
Calibration Uncertainty
Output Range
Measurement Repeatability
Long-term Drift
Non-linearity
Field of View
Spectral Ranges
Directional (Cosine) Response
Temperature Response
Housing
IP Rating
Operating Environment
Dimensions
Mass (with 5 m of cable)
Cable
Calibration Traceability
The PAR sensor in Apogee S2 series PAR-FAR sensors are calibrated through side-by-side comparison to the mean
of four transfer standard quantum sensors under a reference lamp. The transfer standard quantum sensors are
calibrated with a quartz halogen lamp traceable to the National Institute of Standards and Technology (NIST).
The far-red sensor in Apogee S2 series PAR-FAR sensors are calibrated through side-by-side comparison to the
mean photon flux density of four transfer standard far red radiometers under far red LEDs (735 nm peak, 710-760
nm range). The transfer standard far red sensors are calibrated against a spectroradiometer (Apogee Instruments
model PS-300) under the same far red LEDs. The spectroradiometer is calibrated with a quartz halogen lamp
traceable to the National Institute of Standards and Technology (NIST).
RS-485 quiescent 37 mA, active 42 mA
Custom for each sensor and stored in firmware
Less than 1 % (up to 4000 µmol m⁻² s⁻¹) (PAR)
Less than 1 % (up to 1000 µmol m⁻² s⁻¹) (Far-red)
± 2 % at 45°; ± 5 % at 75° zenith angle
Anodized aluminum body with acrylic diffuser
-40 to 70 C; 0 to 100 % relative humidity
30.5 mm diameter, 37 mm height
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
S2-442
5.5 to 24 V DC
RS-232 37 mA;
± 5 %
Modbus
Less than 1 %
Less than 2 % per year
180°
389 to 692 nm ± 5 nm (PAR)
700 to 760 nm ± 5 nm (Far-red)
Less than 0.1 % per C
IP68
140 g