GX-2012 Operator’s Manual Measuring Mode, Alarms • 37
High Alarm
Concentration of gas
rises above the Alarm
level, or rises above the
High Alarm level for O
2
.
• ALARM appears
below the gas list.
• Reading for the gas in
alarm flashes
• Alarm LEDs flash
faster than warning
indication
• Backlight turns on
• Buzzer sounds
alternating between
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 appears
below the gas list.
• Alarm LEDs flash
• Back light 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
Over Range*
• Gas reading replaced
by brackets flashing at
same rate as alarm
indication
• Alarm LEDs flash at
same rate as alarm
indication
• Back light turns on.
• OVER appears below
the gas list.
• Buzzer sounds
alternating between a
low and high pitch at
same rate as alarm
indication
• Vibrator pulses at
same rate as alarm
indication
Low Flow*
• The display indicates
FAIL LOW FLOW
• The Alarm LED’s flash
• Buzzer sounds a
double pulsing tone
(two pulses in quick
succession)
Low Battery
Warning*
• Battery icon blinks • None
Dead Battery Alarm*
• Gas readings
replaced by FAIL
• Fan symbol
disappears
• BATTERY displayed
along bottom of
screen
• Alarm LED arrays
flash
Buzzer sounds a double
pulsing tone (two pulses
in quick succession)
Table 4: Alarm Types and Indications
Alarm Type Visual Indications Other Indications
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