MSA ALTAIR PRO Manuel D'utilisation page 22

OPERATION
High Alarm
If the gas concentration reaches or exceeds the high alarm setpoint the instrument
will:
display and flash "
!
! enter a high alarm sequence.
The high alarm can be silenced for five seconds by pressing the button while it is
still in high alarm. The high alarm is latching and will not reset when gas
concentration falls below the HIGH setpoint.
To reset alarm, push the button after the gas level falls below the setpoint.
Refer to the instrument during turn ON for factory-set alarm points.
If a gas concentration exceeds an alarm setpoint, the:
! audible alarm sounds
! alarm lights flash
! vibrator activates
! alarm type displays, alternately flashing the ALARM icon and the "
icon (if the low alarm setpoint was exceeded) or "
alarm setpoint was exceeded).
STEL Alarm
If the STEL (Short Term Exposure Limit) reading reaches or exceeds the STEL
alarm setpoint the instrument will:
! display and flash "
enter a low alarm sequence
!
The STEL alarm can be silenced for five seconds by pressing the button while it
is still in alarm.
The STEL alarm is non-latching and will reset when STEL reading falls below the
STEL setpoint. The STEL value can be cleared. (" Fig. 5 for details.)
TWA Alarm
If the TWA (Time Weighted Average) reading reaches or exceeds the TWA alarm
setpoint the instrument will:
! display and flash "
! enter a low alarm sequence.
The TWA alarm can be silenced for five seconds by pressing the button while it is
still in alarm
The TWA alarm is latching and will not reset. The TWA value can be cleared.
(" Fig. 5 for details.)
Refer to the instrument during test mode for factory-set alarm setpoints.
22
HI ALARM
" and "
LO ALARM
" and "
LO ALARM
" and "
ALTAIR PRO - Operating Manual
"
HI
" icon (if the high
"
"
MSA
LO
"
GB