Ref :UM-CT7-11-001 Issue : 01 Date : 28/04/2011 Page 33 of 35 11 Annex 1 Charateristisc This document is OPO property. It may not be either used or copied without authorization. OPO sprl, Crawhez 9, 4890 Thimister Clermont, Belgium. +32 87688989 - +32 87598990 Parameter Value Comments 1 2 Reflection wavelengths 365nm 404nm 760nm 970nm 464nm 522nm 624nm Sources are LED 3 Scattering (DUST) index wavelengths Same as reflection Not implemented 4 Detectors Silicon Photodiodes 5 Operating temperature -15 .. +40 °C Note : may need recalibration at actual temperature Batteries may show reduction of capacity at low temperatures. 6 Storage temperature -20°C +60°C Not operating .
7 Power consumption 5V, Current limited to 450mA Limited by construction. Protected by resettable fuse 8 Battery 2x AA NiMh 2450mAh Actually installed may be higher capacity 9 Charge About 5h From USB socket, CT7 switched OFF 10 Battery practical capacity 200 measures Reflection, 3 days in stand by 11 Power/data connector Mini USB, type B 12 Dimensions 73 x 85 x 143 mm 13 Mass 685g