A standard diffusor is available to extend the measuring possibilities of specbos 2501, specbos 2501-UV, specbos 1211-2, specbos 1211-UV-2, spectraval 1501 and spectraval 1511 to spectral Irradiance. The calibration data of the diffusor will be stored in the device. The following parameters will be reached:
| Measuring range Illuminance |
2 - 1 250 000 lx (Illuminant A)
1 - 1 000 000 lx (typical white LED) |
| Illuminance accuracy |
± 2.4 % |
| Illuminance reproducibility |
± 0.5 % |
| Chromaticity accuracy |
± 0.002 xy (Illuminant A) |
| Color reproducibility |
± 0.0005 xy (Illuminant A) |
| Aperture (diameter) |
7 mm |
