Honeywell BW Ultra - Chapter 6: Appendices

CHAPTER
6
APPENDICES
Auto Detect Gas
While the gas is applied during calibration, the detector will wait for up to 300 seconds to allow
the gas to stabilize. If the gas has not stabilized by then, the detector will display a Gas
unstable message. If the gas stabilizes within 300 seconds, it will be automatically detected
and will not have to be selected from a menu. The name of the gas and a Span calibration in
progress message will be displayed. If a quad gas mixture was used, the detector will display
the names of all four gases.
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.
BW Ultra 39 User Manual