Lufft CHM 15k, User Manual

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Operating Manual CHM 15k R13 / 07-2019
Technical Data 8
3
Technical Data
3.1 Ordering information
Equipment Versions
Order number Description Power supply
Cable
length
8350.00 CHM 15k Basic 230 VAC ±10% 10 m
8350.01 CHM 15k + DSL Modem 230 VAC ±10% 3 m
8350.01-BW
CHM 15k + DSL Modem with AIT
identification code
230 VAC ±10% 3 m
8350.03 CHM 15k + DSL prepared 230 VAC ±10% 10 m
8350.10 CHM 15k- US/CA 115 VAC ±10% 10 m
8350.B050 CHM 15k EU 230 VAC ±10% 50 m
Table 1 Equipment versions.
General remarks: The standard cable length is 10 m for the RS485, LAN (or DSL) and power cable.
DSL, battery backup are options and are also available for the 115 VAC device version.
3.2 Technical data
Measurement parameters
Measuring range 0
m … 15 km (0 … 50000 ft)
Cloud detection range 10
m … 15 km (33 … 50000 ft)
Resolution (measured) 5 m
NetCDF data resolution
(*)
5 m
– 30 m in 5 m steps (can be set by the user)
15 m (default setting)
NetCDF high resolution data 5 m (defined for limited HR vector of data)
Logging time and reporting
cycle
(*)
2 s to 600 s (programmable)
Default value: 15 s
Measurement objects Aerosols, clouds (droplets, ice crystals)
Measured / set parameters
Backscatter raw data
Cloud heights up to 9 layers including penetration depth, max.
detectable range (MXD), vertical visibility (VOR), Sky Condition
Index (SCI), cloud cover (TCC, BCC), ...
Measuring principle Lidar (optical, time of flight)
Optical parameters
Light source Nd:YAG solid state laser, diode pumped
Wavelength 1064 nm
Spectral width 0.1 nm
Output power P
avg
(max) 59.5 mW
Pulse repetition rate 5-7 kHz
Pulse duration 1 ns
Laser divergence <0.5 mrad
Filter bandwidth 1 nm
Long-time stability over 12
months (pulse repetition rate)
<10 %
Filter bandwidth 1 nm
Field-of-view receiver (FOV) 0.45 mrad
Extended NOHD 1 km (for 50 mm aperture)