
Model 8339 Ceilometer
User’s Manual
23
8339 ASOS CL Command
The 8339 ASOS CL command enables automated control of heaters for keeping freezing and solid
precipitation from blocking critical sensing elements. The sensor, after processing the command, will
use internal algorithms to control the heater operation. The result of the command indicates the status
of the heater at completion.
Table 17. Responses to ASOS CL Command
Position
Description
Value
1
Start of
Transmission
STX
2
Sensor ID
(ASCII)
C
3
Command
Identifier
L
4
Sensor Heater
Energized
0 if heater is not energized
1 if heater is energized
5-6
Checksum
CC
7
End of Text
ETX
8
Carriage Return
CR
9
Line Feed
LF
Summary of Contents for 8339
Page 57: ...allweatherinc...
Page 58: ...allweatherinc...
Page 59: ......
Page 60: ......
Page 61: ......
Page 62: ......
Page 63: ......
Page 64: ......
Page 65: ......