Apogee SI-421 Benutzerhandbuch - Seite 6

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SPECIFICATIONS

Input Voltage Requirement: 4.5 to 24 V DC

Current Drain: 1.1 mA (quiescent), 6 mA (transmitting)

Calibration Uncertainty (-20 to 65 C): 0.2 C, when target and detector temperature are within 20 C

Calibration Uncertainty (-40 to 80 C): 0.5 C, when target and detector temperature are different by

more than 20 C (see Calibration Traceability below)

Measurement Repeatability: < 0.05 C

Stability (Long-term Drift): less than 2 % change in slope per year when germanium filter is maintained

in a clean condition (see Maintenance and Recalibration section below)

Response Time: 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

Field of View: 22° half angle (SI-411)

18° half angle (SI-421)

14° half angle (SI-431)

32° horizontal half angle; 13° vertical half angle (SI-4H1)

Spectral Range: 8 to 14 µm; atmospheric window (see Spectral Response below)

Operating Environment: -45 to 80 C

Dimensions: 2.3 cm diameter and 6.0 cm length

Mass: 190 g (with 5 m of lead wire)

Cable: 5 m of four conductor, shielded, twisted-pair wire.

Additional cable available in multiples of 5 m

Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)

Pigtail lead wires

0 to 100 % relative humidity (non-condensing)