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specbos 1201 is one of the smallest VIS spectroradiometers available worldwide (download datasheet). Its easy-to-use software has the full complement of radiometric and colorimetric functions requisite for research， diagnostic,， and quality control applications. Several special calculations and features are implemented in the software JETI LiVal e.g. the calculation of RGB,， PAR and circadian values， pass/ fail functions and a LED Ranker (Ranking of LED's and other light sources; see applications).specbos 1201 can be used for measurements in Irradiance mode as well as in Radiance mode with measuring diameters beginning from 4 mm. The special model specbos 1201 focus can measure diameters of 3 mm,， 1 mm and 0.5 mm in radiance mode. Furthermore the model specbos 1201 flash is available. It measures pulsed sources,， both single and continously flashed， in Irradiance mode.
| Optical Parameters | |
| Spectral range | 380 nm .. 780 nm |
| Wavelength resolution (FWHM) | 5 nm |
| Calculated wavelength step | 1 nm |
| Digital electronic resolution | 16 Bit ADC (15 Bit used) |
| Viewing angle (luminance mode) | 1.8° |
| Measuring distance/ diameter | 20 cm - Ø 6 mm; 100 cm - Ø 31 mm (luminance mode) |
| Measuring values | Spectral radiance; Total luminance/ total radiance; Total illuminance/ total irradiance; Chromaticity coordinates x,，y; u',，v'; Correlated Color Temperature， color purity; Color Rendering Index; Circadian metrics,， Photosynthetically Active Radiation |
| Measuring range and accuracies | |
| Measuring range luminance | 2 ... 7×104 cd/m2 (higher values with optional filter) |
| Measuring range illuminance | 20 ... 5×105 lx |
| Luminance accuracy | ± 2 % (@ 100 cd/m2 and illuminant A) |
| Luminance reproducibility | ± 1 % |
| Chromaticity accuracy | ± 0.002 x,， y (@ illuminant A) |
| Color reproducibility | ± 0.0005 x,， y |
| CCT reproducibility | ± 20 K (@ illuminant A) |
| Wavelength accuracy | ± 0.5 nm |
| Technical Parameters | |
| Dispersive element | Imaging grating (flat field) |
| Light receiving element | Photodiode array 1024 pixel (binned) |
| Power supply | USB powered |
| PC interface | USB 2.0 fullspeed |
| Dimensions (drawing) | 140 mm x 58 mm x 34 mm |
| Weight | 350 g |
| Operating conditions | Temperature 10 ... 40 °C Humidity 85 % relativ humidity at 35 °C |
| Miscellaneous | |
All inclusive accessories packet | Cosine corrector head-piece Tripod Transport box PC software JETI LiVal JETI SDK LabVIEW VI's (Virtual Instruments) Short instructions Operating instructions (digital) and firmware commands (digital) USB cable Trigger connector |
| Calibration | NIST traceable |
| Recommended recalibration interval | 1 year |
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