Campbell CS135, User Manual

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CS135 Ceilometer
30
A green LED is visible through the window, see Fig 5.2. It will give 0.5 second
flashes as follows:-
1 flash every 10 seconds = OK, no fault
2 flashes every 10 seconds = warning (possible degraded performance)
3 flashes every 10 seconds = alarm (measurements not possible)
6. Messages
6.1 Data Messages General
The CS135 can provide a variety of data message types to allow efficient output
of data. Not all messages provide the full information available but these
messages may be more efficient in terms of data storage and transmission.
CL31 and CT25K messages follow formats used by common existing CL31 and
CT25K sensors allowing easier replacement or network expansion.
6.2 CS Messages
Message 001 (no profile, no sky condition) – Default message
LINE 1
STX
CS ID OS N ETX CR LF
where
STX = Start-of-Heading character
CS = Always "CS"
ID(1 character)
= A single ASCII character, 0-9, a - z or A - Z, case sensitive. Default ID = 0
OS (3 characters)
= Operating system, 001 ... 999
N (3 characters)
= Message number
ETX = End-of-Text Character
CR LF = Carriage Line Feed
LINE 2
S WA
9
tr
9
h1
9
h2
9
h3
9
h4
9
flags CR LF
where
S (1 character) = message status:
0 = No significant backscatter