Appendices; Auto Detect Gas; Gas Alarm Setpoints; Sample Factory Alarm Setpoints - Honeywell BW Ultra User Manual

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
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.

Sample Factory Alarm Setpoints

Following table lists alarm setpoints as defined by the US
Occupational Safety and Health Association (OSHA).
Gas TWA STEL
H2S 10 ppm 15 ppm
CO 35 ppm 50 ppm
O2 N/A N/A
LEL N/A N/A
Note: To disable an alarm, set the alarm setpoint to 0 (zero) in Fleet
Manager II.
BW Ultra User Manual
Condition
Low High
10 ppm 15 ppm
35 ppm 200 ppm
19.5% vol. 23.5% vol.
10% LEL 20% LEL

Specifications

Detector dimensions: 8.1 x 14.6 x 5.1cm
Weight: 444.2 g
Operating temperatures: -4°F to +122°F (-20°C to +50°C)
Battery operating times: 10 hours.
Rechargeable battery: 8 hours in a temperature range from
5 °C to 35 °C.
Storage temperature: -40°F to +122°F (-40°C to +50°C)
Operating humidity: 0% to 95% relative humidity
(non-condensing)
Detection range:
H2S: 0 – 100 ppm (1 / 0.1 ppm increments)
CO: 0 – 500 ppm (1 ppm increments)
O2: 0 – 30.0% vol. (0.1% vol. increments)
Combustible (LEL): 0% to 100% LEL (1% LEL increments)
or 0.0% to 5.0% v/v methane
Sensor type:
Alarm conditions: STEALTH, TWA alarm, STEL alarm, low
alarm, high alarm, multi-gas alarm, low battery alarm,
confidence beep, automatic deactivation alarm
Audible alarm: 95 dB at 30 cm (1 ft.) (100 dB typical)
variable pulsed beeper
Visual alarm: Red light-emitting diodes (LED)
Display: Alphanumeric liquid crystal display (LCD)
Screen resolution: 160X240 pixels.
Backlight: Activates when the pushbutton is pressed and
deactivates after 5 seconds; also activates during an alarm
condition
Self-test: Initiated upon activation.
Calibration: Automatic zero and automatic span.
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