GasAlertQuattro
User Manual
44
Gas Alarm Setpoints
Gas alarms are activated when detected gas concentrations are above
or below the user-defined setpoints. The gas alarms are described in
Table 9. Gas Alarm Setpoints
Sample Gas Alarm Setpoints
lists alarm setpoints as defined by the US Occupational Safety
and Health Association (OSHA).
Note
Standard factory alarm setpoints may vary by region.
Table 10. Sample Factory Alarm Setpoints
Note
To disable an alarm, set the alarm setpoint to
0
(zero) in Fleet
Manager II.
To change the factory-defined alarm setpoints, refer to the following
options in
.
Alarm
Condition
Low
Toxics and combustibles:
Ambient
gas level above low alarm setpoint.
Oxygen:
Ambient gas level may be
set above or below 20.9% (or 20.8%).
High
Toxics and combustibles:
Ambient
gas level above high alarm setpoint.
Oxygen:
Ambient gas level may be
set above or below 20.9% (or 20.8%).
TWA
Toxics only:
Accumulated value
above the TWA alarm setpoint.
STEL
Toxics only:
Accumulated value
above the STEL alarm setpoint.
Multi-gas
Two or more gas alarm conditions
simultaneously.
Over Limit (OL)
OL
or
-OL
displays when readings
are above or below the sensor detec-
tion range, respectively. Refer to
for detection ranges.
Gas
TWA
STEL
Low
High
H2S
10 ppm
15 ppm
10 ppm
15 ppm
CO
35 ppm
50 ppm
35 ppm
200 ppm
O2
N/A
N/A
19.5% vol.
23.5% vol.
LEL
N/A
N/A
10% LEL
20% LEL
