Vaisala FS11 - MESSAGE 4, Uncompensated Values

USER'S GUIDE ____________________________________________________________________
78 ___________________________________________________________________ M211187EN-C
MESSAGE 4, Uncompensated Values
Message 4 includes both contamination compensated and uncompensated
visibility and background luminance measurement values. Message 4
also contains 3 and 10 minute average visibility values. The message
format is as follows:
!
FSA
∀
VIS 02100 VUC 02100 VIS3M 02000 VIS10M 01900
AL 0 BL 01050 BUC 01050 AL 0
#
CSUM
∃−∗
where
!
=
Start of the heading
FS
=
FS11 sensor identifier
A
=
First character of the unit identifier, if the ID
is not defined it is replaced by a space
character
∀
=
Start of the text
VIS 02100
=
Visibility identifier and MOR value, unit
meter (SI-unit), 1 min average
VUC 02100
=
Uncompensated visibility identifier and MOR
value
VIS3M 02000
=
Visibility identifier and MOR value, 3 min
average
VIS10M 01900
=
Visibility identifier and MOR value, 10 min
average
AL 0
=
Alarm status of the visibility sensor
BL 01050
=
Background luminance identifier and BL
value, unit cd/m
2
BUC 01050
=
Uncompensated BL identifier and BL value
AL 0
=
Alarm status of the background luminance
sensor
#
=
End of the text
CSUM
=
Checksum CRC16
∃
=
End of the transmission
−∗
=
CR + LF
The total amount of characters in the message is 86. The transmission
times are: 2.86 s at 300 bps (10-bit char), 0.36 s at 2400 bps, 0.090 s at
9600 bps.
For a list of alarm status code explanations, refer to Table 11 on page 74.