Gas Tracer Operator’s Manual, CSA Version
Measuring Mode, Alarms • 41
Measuring Mode, Alarms
This section covers alarm indications in Measuring Mode. It also tells you how to
reset the Gas Tracer after an alarm has occurred and how to respond to an alarm
condition.
NOTE:
False alarms may be caused by radio frequency (RF) or electromagnetic
(EMI) interference. Keep the Gas Tracer away from RF and EMI sources
such as radio transmitters or large motors.
Alarm Indications
CAUTION:
If the combustible channel is set for %volume only, then there are no gas
alarms for any detection channel. See “HC Range Screen” on page 48.
The Gas Tracer will sound an alarm, the unit will vibrate, and the LED arrays will
flash when one of the target gas concentrations rises above the Warning level, or
in the case of oxygen, falls below the Low Alarm setting for that gas.
The Gas Tracer also sounds an alarm, vibrates, and flashes the LED arrays when
the Alarm level is reached for combustible gas and CO, when the concentration of
oxygen rises above the High Alarm level, and when the STEL and TWA alarm
points are reached for CO.
When a failure condition occurs, such as a sensor failure, low flow, or dead
battery condition, the unit will also sound an alarm, flash the LED arrays, and
vibrate.
The table below summarizes the types of alarms produced by the
Gas Tracer.
Table 4: Alarm Types and Indications
Alarm Type
Visual Indications
Other Indications
Low Alarm
Concentration of gas
rises above the Warning
level, or falls below the
Low Alarm level for O
2
.
• WARNING appears
below the gas list.
• Reading for the gas in
alarm flashes
• Alarm LED arrays
flash
• Backlight turns on
• Buzzer sounds
alternating between a
low and high pitch
• Vibrator pulses
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
