MSA Ultima X Series Installation & Maintenance Instructions Manual page 89

BYTE BIT MEANING
3 0 End of Life Warning
1 Sensor Swap Delay
2 Change Sensor Fault
3 Sensor Power Fault
4 Internal Comm Fault
5 Cal Sig Enable
6 Alert Option Enable
7 Relay Fault
4 0 Alarm 1 Set
1 Alarm 2 Set
2 Alarm 3 Set
3
4
5
6
7
"Not used" bits are always set to 0.
Some bits used in this transmitter indicate device or sensor failure and, therefore,
also set bit 7 and bit 4 of the Device Status byte.
These bits are set or cleared by the self-test executed at power up, or following a reset.
They are also set (but not cleared) by any failure detected during
continuous background self-testing.
CLASS DEVICE
STATUS
BITS SET
Warning 4,7
Info
Error
Error 4,7
Error
Info
Info
Error
Warning
Warning
Warning
D-5