Select an operation mode

The detector can be used in one of three modes: Essentials mode, Hole Watch mode, and Inert mode.

Note: Honeywell BW � Ultra always monitors gas levels, regardless of the operating mode. If the detector detects a sudden gas exposure, it will flash, vibrate, and produce a loud siren noise. A gas level alarm takes precedence over all of the detector�s other functions.

Essentials mode

The detector only shows the gas readings.

Hole Watch mode

The Hole Watch mode is the default operating mode. It is used for confined space monitoring. Use Hole Watch mode to monitor all gas levels in the same screen view. Hole Watch mode uses bar graphs that fill when the detector detects rising gas concentrations.

When the detector detects normal gas levels, Hole Watch mode displays empty bar graphs.
When the detector detects non-critical gas levels, Hole Watch mode displays filling bar graphs.
When the detector activates a single gas alarm, Hole Watch mode highlights the detected gas level for that gas in a solid bar.
When the detector activates a multiple gas alarm, Hole Watch mode continues to display the first detected gas level, as well as highlight other detected gas levels in a solid bar.
For oxygen, Hole Watch mode displays low and high levels in a bar graph. As the detector detects a low oxygen level, the bar graph fills toward LO.
As the detector detects a high oxygen level, the bar graph fills toward HI

Inert mode

You can configure Inert Mode in Fleet Manager II. The threshold for operation is 10%. If oxygen readings fall below 10%, the detector prompts the user to enter the Inert mode. The detector does not start automatically in Inert Mode.

When the detector goes into Inert Mode, the alarms setpoint get activated. If the detector does not enter in Inert mode, The O₂ readings are considered normal.