RKI Instruments GX-2003 Manual - Manual (Page 29)

GX-2003 Operator’s Manual Measuring Mode, Alarms • 22
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 26.
The GX-2003 will sound an alarm, the unit will vibrate, and the LED
arrays will flash when one of the target gas concentrations rises above
the Alarm 1 level, or in the case of oxygen, falls below the Low Alarm
setting for that gas.
The Model GX-2003 also sounds an alarm, vibrates, and flashes the
LED arrays when the Alarm 2 level is reached for CH
4
, CO, and H
2
S,
when the concentration of oxygen rises above the High Alarm level,
and when the STEL and TWA alarm points are reached for CO and
H
2
S.
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
GX-2003.
Table 4: Alarm Types and Indications
Alarm Type Visual Indications Other Indications
Low Alarm
Concentration of gas
rises above the low
alarm level, or falls
below the Low Alarm
level for O
2
.
• ALM1 appears
blinking next to gas
reading.
• Alarm LED arrays
flash once per
second.
• Pulsing tone once per
second
• Unit vibrates once per
second
High Alarm
Concentration of gas
rises above the Alarm 2
level, or rises above the
High Alarm level for O
2
.
• ALM2 appears
blinking next to gas
reading.
• Alarm LED arrays
flash twice per
second.
• Pulsing tone twice per
second
• Unit vibrates twice per
second
TWA or STEL
Concentration of CO or
H
2
S rises above the
TWA or STEL alarm
point setting.
• Alarm LED arrays
flash once per
second.
• Back light turns on.
• TWA or STEL appears
blinking next to gas
reading.
• Pulsing tone once per
second
• Unit vibrates once per
second