RBR Coda 3 D, Руководство пользователя

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RBR#0008817revC 6
PAR and narrow-band radiometers
The RBR coda
3
PAR and RBR coda
3
rad instruments look identical and share several specifications.
The RBR coda
3
PAR and RBR coda
3
PAR | deep use the cosine photosynthetically active radiation sensors.
The RBR coda
3
rad and RBR coda
3
rad | deep use radiometers measuring narrow-band light with a fixed channel width,
available in various 10nm- and 25nm-wide channels. Both centre wavelength and channel width are factory-
configured.
Optical radiometry
Parameter Value
Initial offset error* ±0.0025% full scale
Resolution** ±0.0002% full scale
Dynamic range >5.5 decades (nominal)
Absolute calibration*** ±5%
Linearity ±1%
Time constant <5ms
Operating temperature
range -5°C to 35°C
Gain temperature
dependence 0.15% / °C
Cosine response error
(water)
±5% at 0-60°,
±10% at 61-82°
Azimuth error (water) ±1.5% at 45°
Out-of-band rejection** >25dB (typical), OD 2.5
* Dark offset is internally temperature-compensated.
** Out-of-band rejection and resolution are wavelength
dependent for narrow-band radiometers.
*** RBR calibrates radiometers with NIST traceable
references.
PAR
Parameter Value
Wavelength range 400 to 700nm
Full scale range
0 to 5000µmol/m
2
/s (minimum)
Initial offset error* ±0.125umol/m²/s
Resolution ±0.010umol/m²/s
.
Narrow-band channels
Parameter Value
Centre
wavelengths (CWL) 413/ 445/ 475/ 488/ 508/ 532/
560nm
Accuracy
(for CWL)
±3nm (for all CWLs except 475nm)
±5nm (for CWL 475nm only)
Full width at half-
maximum (FWHM) 10nm (for all CWLs except 475nm)
25nm (for CWL 475nm only)
Accuracy
(for FWHM)
±3nm
Full scale range
0 to 400µW/cm
2
/nm (minimum)
Initial offset error* ±0.010µW/cm²/nm
Resolution** ±0.001µW/cm²/nm
PAR radiometer