Instruction Manual

GX-2009 Operator’s Manual Operation • 22
Alarm Indications
The GX-2009 will sound an alarm, the LEDs will flash, and the unit will
vibrate when one of the target gas concentrations rises above the Warning
(low alarm) setpoint, or in the case of oxygen falls below the Warning
setpoint, for that gas.
The GX-2009 will also sound an alarm, the LEDs will flash, and the unit will
vibrate when the Alarm (high alarm) setpoint is reached for any of the
channels and when the STEL and TWA alarm points are reached for CO
and H
2
S.
When a trouble condition occurs, such as a sensor failure or low battery
charge, the alarm indication will depend on the alarm type.
Table 4 below summarizes the types of alarms produced by the GX-2009.
Table 4: Alarm Types and Indications
Alarm Type Visual Indications Other Indications
Warning (low alarm)
Concentration of gas rises
above the Warning
setpoint or falls below the
Warning setpoint for O
2
• WARNING blinks to the
right of the battery level
icon
• Reading for the gas in
alarm flashes
• Alarm LEDs flash
• Backlight turns on
• Buzzer sounds
alternating between
a low and high pitch
• Vibrator pulses
Alarm (high alarm)
Concentration of gas rises
above the Alarm setpoint
• ALARM flashes to the
right of the battery level
icon faster than Warning
indication
• Reading for the gas in
alarm flashes faster than
Warning indication
• Alarm LEDs flash faster
than Warning indication
• Backlight turns on
• Buzzer sounds
alternating between
a low and high pitch
faster than Warning
indication
• Vibrator pulses
faster than Warning
indication
TWA or STEL
Concentration of CO or
H
2
S rises above the TWA
or STEL alarm point setting
• TWA or STEL flashes to
the right of the battery
level icon
• The gas name in alarm
flashes
• Alarm LEDs flash
• Backlight turns on
• Buzzer sounds
alternating between
a low and high pitch
at the same rate as
Warning indication
• Vibrator pulses at
same rate as
Warning indication