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Manual abstract: user guide VAISALA LD-40DATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] Vaisala LD-40 Ceilometer Cloud Height Measurement up to High Cirrus
· 13, 000 m (43, 000 ft) measurement range · Cirrus cloud detection at high altitude · Sophisticated algorithms for cloud detection · No need for field adjustments · Modular design: subassemblies are easily replaced in the field without optical realignment
The Vaisala LD-40 "Tropopauser" is a compact, long-range ceilometer for cloud detection and atmospheric profiling. [. . . ] HIGH PERFORMANCE UNDER ALL KINDS OF PRECIPITATION Using the backscatter signal, the LD-40 calculates cloud height, the maximum detection range, vertical visibility, and provides precipitation status. The standard report includes height values for up to 3 cloud layers. The long measurement range allows cirrus clouds to be detected at high altitude. Sophisticated algorithms are employed to ensure reliable cloud detection under all kinds of precipitation. When a cloud base cannot be distinguished during weather conditions associated with very low visibility, vertical visibility is still reported. The LD-40's ability to report raw data also makes it a valuable tool for atmospheric research.
MINIMAL MAINTENANCE WHATEVER THE CLIMATE The LD-40 operates unattended under all climatic conditions. [. . . ] including heating I/O connections Data line: RS232/RS422/RS485/modem Maintenance line: RS232
MECHANICAL Dimensions Weight
1260 (h) x 444 (w) x 404 (d) 40 kg -40 to 55 °C up to 100 % RH 55 m/s EN 60 950
ENVIRONMENTAL Operating temperature Operating humidity Wind Electrical safety
ACCESSORIES Cloud Height Simulator for operational testing in field conditions Solar shutter for protecting against direct solar radiation Service tool set
Power, data line and accessories are to be specified when ordering
Vaisala Oyj P. O. Box 26 FIN-00421, Helsinki FINLAND Phone: (+358 9) 894 91 Telefax: (+358 9) 894 92227
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