75
Alarm level: LENS peer low
Peer gas present, low
alarm
Peer TWA
—
—
Figure 6.1 Alarm events (display screens)
Warnings
Warnings turn on and off repeatedly. The more urgent the warning, the shorter the time between on-off
occurrences: a warning that repeats every two seconds is more urgent than a warning that repeats every
thirty seconds.
Warnings persist until the event is resolved. In some cases, an unresolved warning will cause an alarm. For
example, if the man-down warning turns on and the instrument operator does not turn it off, the instrument
and its signals will change from warning status to alarm status. Similarly, a low-battery warning that is not
resolved will change to alarm status indicating a critical low-battery condition.
When all signal* settings are on, warnings appear as a short burst of blue and red light mixed with sound
and a vibration.
As with alarm events, warnings are distinguished from one another on the instrument display (see Table
6.2 below).
For LENS-group peer instruments, when an instrument can no longer connect with any instrument in its
group, it is said to be "lost"—not within range of any peer-instrument. These warnings will occur:
The instrument will activate its "group lost" warning to indicate to its operator that he or she is no longer
connected to the group. It will continually attempt to rejoin the group for five minutes.
The peer instruments will activate the "peer lost" warning, which will identify the name** of the lost
peer, the instrument user who has lost his or her connection to the group.
*Signals (visual, audible, and vibration) vary based on instrument settings.
**Requires valid user assignment.
Table 6.2 Warnings (list)
Symbol
Warning
Description
MAN DOWN
Man-down
The instrument has not moved for the set period of time. To turn
off the warning, move the instrument.
Gas alert
A detected gas concentration may be approaching alarm levels.
To turn off the warning, press and hold .
LEL-Low O
2
LEL and O
2
sensors are installed and the concentration of O
2
is
insufficient for LEL sensor functionality.
F
Sensor failure
One or more sensors is not working.
