User Manual

GasWatch 2 Operator’s Manual Operation • 14
TWA or STEL
(GW-2C & GW-2H
Only)
Concentration of CO
or H
2
S rises above the
TWA or STEL alarm
point.
• Back light turns on.
• TWA or STEL
blinks to the left of
the battery icon.
• If the unit is in both
TWA alarm and
STEL alarm, both
TWA and STEL will
be displayed.
• Pulsing tone once
per second.
• Unit vibrates once
per second.
• Alarm light flashes
once per second.
Over Range • Gas reading
replaced by blinking
brackets.
• Back light turns on.
• Pulsing tone once
per second.
• Unit vibrates once
per second.
• Alarm light flashes.
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)
once a second.
Sensor Failure • Gas reading
replaced by FAIL.
• Double Pulsing
Tone (two pulses in
quick succession)
once a second.
System Failure • Gas reading
replaced by FAIL.
• Time replaced by
SYS below FAIL.
• Double Pulsing
Tone (two pulses in
quick succession)
once a second.
Table 3: Alarm Types and Indications
Alarm Type LCD Indications Other Indications