Chapter 5 ________________________________________________________________ Operation 
VAISALA ______________________________________________________________________ 175 
The total amount of characters in the message is 140. The transmission 
times are: 4.7 s at 300 bps (10-bit char), 0.58 s at 9600 bps. 
For visibility alarm/status code explanations, refer to Table 13 on page 
164. 
For background luminance alarm/status code explanations, refer to Table 
34 on page 173. 
For PWD alarm/status code explanations, refer to Table 33 on page 173. 
Message 3 - Status Message 
The status message contains the results of the built-in tests. These 
numerical internal monitoring measurement values can be requested with 
the STATUS command. The short status check message which contains 
a short, clear language report of the system status can be requested with 
the STATUS CHECK command. The following is an example of a 
status message: 
!LT1" LT31 SYSTEM: OK 
 Status: 02000000000000000000 
Interface unit: 
 Temperatures (unit C): 
  CPU: 32.7 external:///// 
  Humidity://// 
  Voltages: 
   +12V:   11.8 +12Vout:    0.5 PVin:   20.8 V5I:  ON 
Transmitter unit: OK 
 Status 
  EEPROM:00 TEMP:00 ALIGN:00 MISC:00 
  HEATER:H BLOW:0 
 Temperatures (unit C): 
  Heater:+48.2 Enclosure:+42.9 
  WinRec:+43.7 WinTrm:+43.6 MainTrm:+41.1 
Receiver unit: OK 
 Status 
  EEPROM:00 TEMP:00 ALIGN:00 MISC:00 
  HEATER:H BLOW:0 REC:S 
 Temperatures (unit C): 
  Heater:+51.0 Enclosure:+41.4 
  WinRec:+41.9 WinTrm:+43.2 MainRec:+37.9 
PWD Sensor: OK 
PWD STATUS 
VAISALA PWD21 V 1.01 2001-11-01 SN:W42106 ID STRING: 0 
 
SIGNAL      0.53 OFFSET    160.77 DRIFT      7.52 
REC. BACKSCATTER      993  CHANGE     58 
TR. BACKSCATTER      -1.2  CHANGE   -0.0 
LEDI    2.6  AMBL    -1.1 
VBB    15.2  P12     11.5  M12     -11.3 
TDRD      7  DRD      800  DRY     815.1 
TS      5.5  TB        10 
HARDWARE :