Apogee SE-421 Manuale d'uso - Pagina 6

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SPECIFICATIONS

Power Supply

Current Draw

Calibration Factor

Calibration Uncertainty

Measurement Range

Measurement Repeatability

Long-term Drift

Non-linearity

Response Time

Field of View

Spectral Range

Directional (Cosine) Response

Temperature Response

Operating Environment

Dimension

Mass (5 m of cable)

Cable

Calibration Traceability

Apogee UV series sensors are calibrated through side-by-side comparison to the mean of four transfer standard UV

sensors under UV-enhanced T5 fluorescent tubes. The transfer standard UV sensors are calibrated through side-

by-side comparison to an Apogee model PS-300 spectroradiometer under sunlight (clear sky conditions) in Logan,

Utah. The PS-300 is calibrated with a quartz halogen lamp traceable to the National Institute of Standards and

Technology (NIST).

Custom for each sensor and stored in the firmware

0.6 s, time for detector signal to reach 95 % following a step change; fastest data

transmission rate for SDI-12 circuitry is 1 s

300 to 400 nm (wavelengths where response is greater than 10 % of maximum; see

-30 to 85 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

SU-221-SS

5.5 to 24 V DC

1.4 mA (quiescent), 1.8 (active)

± 10 %

-2

0 to 100 W m

Less than 0.5 %

Less than 2 % per year

Less than 1 %

180°

Spectral Response below)

± 2 % at 45°, ± 5 % at 75°

Less than 0.1 % per C

140 g