Chapter 5 ________________________________________________________________ Operation
VAISALA ______________________________________________________________________ 171
NOTE
The listed status codes do not cover all possible cases. Combinations are
possible if applicable. If, for example, code 1 and code 2 occur at the
same time, it will lead to code 3.
The byte shown in Table 29 below indicates the status of the LT31 main
receiver module LTD112 which is located inside the receiver
measurement unit LTM212.
Table 29
LT31 Receiver: Main Receiver Module (Byte Number
36)
Code Explanation
Comment
0 OK,
normal
operation
1 Self-test
in
process
2 Receiver
saturated
Direct or indirect solar radiation.
4 Hardware
warning
Internal monitoring alarm signal
exceeded limit
8 Hardware
error
Examples:
Self-test failed.
EEPROM and/or temperature
sensor failure.
NOTE
The listed status codes do not cover all possible cases. Combinations are
possible if applicable. If, for example, code 1 and code 2 occur at the
same time, it will lead to code 3.
The byte shown in Table 30 below indicates the status of the LT31
window transmitter module LTL212 which is located inside the receiver
measurement unit LTM212.
Table 30
LT31 Receiver: Window Transmitter Module (Byte
Number 37)
Code Explanation
Comment
0 OK,
normal
operation
2 Light
source
aging warning
Transmitter derating signal
reached warning limit.
4 Hardware
warning
Internal monitoring alarm signal
exceeded limit.
8 Hardware
error
Examples:
Intensity signal out of limits.
EEPROM and/or temperature
sensor failure.