Gas Alarm Setpoints

Gas alarms are activated when detected gas concentrations are above or below the user-defined setpoints. The gas alarms are described as follows.

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 detection range, respectively.