RKI Instruments GX-94 - Manual (Page 18)

Page 17 GX-94 Operator’s Manual
ALARMS
Alarm Indications
1. Combustibles (HC) Low and High Alarm
If the combustible gas detected exceeds the low alarm setting, a
pulsed tone will sound, the alarm LED will blink, and the display
will flash “HC.”
If the combustible gas detected rises above the high alarm setting,
the alarm tone and alarm LED will be continuous.
2. Oxygen Low and High Alarm
If the oxygen content of the air drops below the low alarm setting,
a pulsed tone will sound, the alarm LED will blink, and the display
will flash “O2.”
If the oxygen content of the air rises above the high alarm setting,
the alarm tone and alarm LED will be continuous.
3. H
2
S and CO Low Alarm
If the H
2
S or CO detected exceeds the low alarm setting, a pulsed
tone will sound, the alarm LED will blink, and “H2S” or “CO” will
flash on the appropriate channel.
Note
The H
2
S and CO channels do not have a high alarm.
4. Short Term Exposure Limit (STEL) Alarm, H
2
S and CO Only
If the average toxic gas level detected over the last 15 minutes
exceeds the STEL alarm setting, a pulsing audible alarm will
sound and the message “STL” will alternate with the gas name on
the display in the field for that gas.
5. Time Weighted Average (TWA) Alarm, H
2
S and CO Only
If the average toxic gas level detected over the last 8 hours
exceeds the TWA alarm setting, a pulsing audible alarm will sound