Lufft CHM 15k Nimbus, Manual

Page: 44 / 101

Communication RS485 & Ethernet
44 Revision R09, November 2016
For standard deviations quoted above, the same exceptional “NODET/NODT/
NaN/---” values are valid as for the corresponding reference parameters (refer to
chapter 8.3.3).
NOTE
For explanations regarding system parameters involved in data evalua-
tion, such as penetration depth, refer to chapter 9.
190-195 ****** Laser operating time (h)
196 ; 3B HEX
197-199 *** Status Window
200 ; 3B HEX
201-205 ***** repetition rate of the laser (PRF) (5 digit)
206 ; 3B HEX
207-209 *** Status receiver
210 ; 3B HEX
211-213 *** Status light source
214 ; 3B HEX
215-219 ***** Aerosol layer 1
220 ; 3B HEX
221-225 ***** Aerosol layer 2
226 ; 3B HEX
227 * Quality index Aerosol layer 1 Byte
228 ; 3B HEX
229 * Quality index Aerosol layer 1 Byte
230 ; 3B HEX
231 * BCC, base cloud cover
232 ; 3B HEX
233 * TCC, total cloud cover
234 ; 3B HEX
235,236 **
Checksum (two's complement of the sum of bytes 0 -239,
expressed in hex code exclusive of 235 and 236)
237 <CR> 0D HEX
238 <LF> 0A HEX
239 <EOT> 04 HEX
Byte
Value
1
Description
Table 9: Format of extended data telegrams (also refer to Table 10),
1
* = any
character
Term Explanatory note
External temperature
The outer temperature measured at the CHM's bottom
face. For precise measurement of outer temperature, an
error of ±5 °C is permissible. Readings are displayed in
Kelvin x 10.
Inner temperature
Temperature measured at the sensor:
displayed in Kelvin x 10; ±2 K
Table 10: Terms in extended data telegram