Lufft CHM 15k Nimbus, Manual

Page: 34 / 101

Communication RS485 & Ethernet
34 Revision R09, November 2016
Explanatory notes relating to table 4
AFDMode:
Switch on/ off the automatic file distribution system via LAN / WAN/
DSL, see http://www.dwd.de/AFD/ for further information or section 8.8.
Altitude(m): Indicates altitude of measurement location above sea level (in
meters). In NetCDF files the parameter CHO (cloud base offset) is used. It logical
combines the variables altitude and usealtitude.
Azimuth: Indicates horizontal angle (in degrees)
Baud: For changes in baud rate (refer to chapter 8.2.3).
BaudAfterError : Standard baud rate after communication error (refer to
chapter 8.2.3)
BlowerMode : Used to test the window blower and to set them into different
operation modes. For example: quiet during night. The parameter „Time Zone
offset Hours“ must be set correctly. 0 = hourly and weather-dependent, 1 = no
hourly from 22 to 6 o'clock, 2 = off from 22 to 6 o'clock, 3 = always on, 4 =
always off
DateTime : Set date and time (refer to chapter 8.2.5)
dt(s): logging time (in automatic more identical to reporting time)
A decrease in time resolution (corresponding to an increase in dt) will cause
more photon pulses (shots) to be averaged over time and yields an improvement
in signal-to-noise performance. An increase by a factor of n results in an
improvement by a factor of the root of n. All raw data which are collected within
a given time window dt(s) will be involved in evaluation. There is no single data
selection option available.
Parameter
Short
CMD
Default
value
Description
APDBreakdown UBR 400000 voltage value for comparison [mV]
ApdTempGradient TCO 2400 value for comparison [ μ V/K]
IPDhcp IPD IP address DHCP
LAserPower LAP 50 laser power value for comparison
LifeTime(h) LIT xxxxxxx
# of hours the laser diode is in opera-
tion
Parameters
delivers a list of all parameters availa-
ble in RS 485 mode
serLOM LOM TUByyxxxx
serial number of laser optical
module (LOM)
SystemLifeTime(h) SLT
Total running hours of the
CHM system
TBCalibration TBC scaling factor against reference
VersionFPGA VFP firmware FPGA
VersionFirmware VFI
firmware version
(data processing and handling)
VersionLinux VLI Linux Kernel Version
Table 5: Read only parameters, accessible via RS485 interface