6
SPECIFICATIONS
Irradiance Calibration Traceability
Apogee SS series spectroradiometers are calibrated with a LI-COR model 1800-02 Optical Radiation Calibrator using a 200 W
quartz halogen lamp. The 1800-02 and quartz halogen lamp are traceable to the National Institute of Standards and
Technology (NIST).
Wavelength Range 340 to 820 nm 635 to 1100 nm
Wavelength Measurement Interval 1.0 nm
Wavelength Resolution 3.0 nm (full width half maximum)
Wavelength Accuracy ± 0.5 nm
Wavelength Repeatability ± 0.2 nm
Analog to Digital Resolution 14 bit
Signal to Noise Ratio 1500:1 (at maximum signal)
Stray Light ≤ 0.25 % at 590 nm ≤ 0.25 % at 850 nm
Dark Noise ≤ 3 counts
Integration Time Range 10 ms to 10 s
Linearity Less than 1 %
Measurement Sensitivity
Greater than 10 % of max sensitivity for
wavelengths greater than 380 nm
(see Sensitivity graph below)
Greater than 10 % of max sensitivity for
wavelengths less than 1030 nm
(see Sensitivity graph below)
Measurement Repeatability
Less than 1.0 % (wavelengths greater than 400
nm)
Less than 1.0 % (wavelengths less than
1020 nm)
Directional (Cosine) Response ± 5 at 75º zenith angle
Fields of View 180°(upward-facing); 25°or 150°(downward-facing)
Operating Environment -20 to 70 C, 0 to 100 % relative humidity
Temperature Response -0.1 ± 0.1 % per C
Irradiance Calibration Uncertainty (see
Irradiance Calibration Traceability below)
± 5 %
Current Draw
90 mA during measurement, 12 mA when idle (datalogger); 190 mA during measurement
and when idle (USB)
Power Requirement 1 W (USB and datalogger)
Communication Protocol ModBus RTU over RS-232 (pigtail and USB)
Interface Cable 5 m santoprene jacket with pigtails (for datalogger), 5 m PVC jacket with USB (for computer)
Software Apogee Spectrovision (windows compatible, XP and later; Mac compatible, 10.9 and later)
Operating Environment -20 to 70 C, 0 to 100 % relative humidity
Thread Size (for Mounting) ¼”-20
Dimensions 89.3 mm height, 50.8 mm width, 38.1 mm depth
Mass 300 g
Warranty 4 years against defects in materials and workmanship
