Vaisala CT25K - 1.2.8 Optical System; 1.2.9 Performance; 1.2.10 Environmental Conditions

Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
9
1.2.8 Optical System
Optics System Focal Length: 377 mm (14.8 in.)
Effective Lens Diameter: 145 mm (5.7 in.)
Lens Transmittance: 96 % typical
Window Transmittance: 98 % typical, clean
1.2.9 Performance
Measurement Range: 0...25,000 ft. (0...7.5 km)
Resolution: 50 ft
25,000 ft. Acquisition Time: min. 15 s
max. 120 s
Receiver Bandwidth: 3 MHz (-3db)
1.2.10 Environmental Conditions
Ambient Temperature: -50...+60 °C (-60 ...+140 °F)
Humidity: to 100 %RH
Wind: to 100 kt (50 m/s)
Vibration: 0.5 g 5 - 500 Hz