User manual VAISALA CL31 DATASHEET

[. . . ] www. vaisala. com CL31 Ceilometer for Cloud Height Detection The Vaisala Ceilometer CL31 is a compact and lightweight instrument for cloud base height and vertical visibility measurements. [. . . ] The single-lens technology provides unsurpassed reliablity during precipitation, low clouds and ground based obscurations, which are the most critical phenomena in aviation safety. Easy installation and maintenance The CL31 is easy to install. It has a radiation shield that protects the unit during precipitation and against excessive heat or cooling in extreme temperatures. The automatic window blower with heater improves performance by keeping the window clean and dry. In cold conditions heating prevents frost generation on the window. Fast measurement Fast measurement helps to detect thin cloud patches below a solid cloud base. The CL31 provides a full backscatter profile for data visualization and research purpose. The tilting option together with the novel optics design provides enhanced performance during precipitation by improving the protection given by the shield. In the measurement unit, a tilt angle sensor automatically corrects the measured cloud distance reading to vertical cloud base height. Vaisala Ceilometer CL31 measures cloud base height and vertical visibility in all weather - good or bad. Features/Benefits Measurement range from 0 to 7. 5 km (from 0 to 25, 000 feet) Second-generation, advanced single-lens optics provides excellent performance also at low altitudes Reliable operation in all weather; unsurpassed performance in vertical visiblity and cloud detection during precipitation Extensive self-diagnostics with fault analysis Modular design for easy installation and maintenance Fast measurement enables detection of thin cloud layers below a solid cloud base Latest technology from the world-leading manufacturer - based on the experience from more than 5000 installed Vaisala ceilometers worldwide Technical data Performance Measurement range 0 . . . 120 s Reporting resolution 5 m/10 ft. , units selectable Distance measurement accuracy against hard target greater of ±1 % or ±5 m Laser InGaAs diode, 910 mm Eye safety Class 1M IEC/EN60825-1 Environmental Temperature range Humidity Wind Housing classification Vibration -40 . . . [. . . ] All specifications -- technical included -- are subject to change without notice. [. . . ]