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03 Series Operator’s Manual
Operation • 26
Alarm
Concentration of gas
rises above the alarm
level.
• Gas reading
flashes.
• ALRM appears
below the gas
reading.
• Back light turns on.
• Alarm LED flashes
faster than warning
indication.
• Buzzer sounds
alternating between
low and high pitch
faster than warning
indication.
• Vibrator pulses
faster than warning
indication.
TWA or STEL
(CO-03 & HS-03 Only)
Concentration of CO
or H
2
S rises above the
TWA or STEL alarm
point.
• Back light turns on.
• Gas reading
flashes.
• TWA or STEL
appears below the
gas reading.
• If the unit is in both
TWA alarm and
STEL alarm, only
STEL
will be
displayed.
• Alarm LED flashes.
• Buzzer sounds
alternating between
a low and high pitch
at same rate as
warning indication.
• Vibrator pulses at
same rate as
warning indication.
Over Range
Concentration of gas
rises above the
measuring limit of the
03 Series. (Or there
could be a problem
with the unit.)
• Gas reading
replaced by blinking
brackets.
• Back light turns on.
• ALRM appears
below gas reading.
• Buzzer sounds
alternating between
low and high pitch
at the same rate as
alarm indication.
• Vibrator pulses at
same rate as alarm
indication.
Low Battery Warning
• Last remaining bar
on the right in
battery icon
flashes.
• None
Dead Battery Alarm
• Gas reading
replaced by FAIL.
• Battery icon
flashes.
• Double pulsing tone
(two pulses in quick
succession) occurs
once a second.
Table 3: Alarm Types and Indications
Alarm Type
Visual Indications
Other Indications