Honeywell BW Ultra User Manual page 10

Honeywell recommends that the sensors be bump tested before each day's use to
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confirm their ability to respond to gas. Manually verify that the audible, visual, and
vibrator alarms are activated. Calibrate if the readings are not within the specified
limits.
The detector is designed for use only in potentially explosive atmospheres where
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oxygen concentrations do not exceed 20.9% (v/v). Oxygen deficient atmospheres
(<10% v/v) may suppress some sensor outputs.
Extended exposure of the detector to certain concentrations of combustible gases
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and air may stress the detector element and seriously affect its performance. If an
alarm occurs due to a high concentration of combustible gases, a calibration
should be performed. If necessary, contact Honeywell service representative to
replace the sensor.
High concentrations of certain toxic gases, for example, H2S, may hurt the LEL
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sensor. This effect, known as inhibition, is usually temporary but in extreme
circumstances can impair the sensitivity of the LEL sensor after any gas exposure
that causes alarm in the toxic gas sensors.
The HoneywellBW™ Ultra is provided with an antistatic coating over the LCD
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window to minimize the risk of ignition due to electrostatic discharge. Periodic
inspection of this coating is required to ensure no degradation, delamination,
abrasions or other deformities to this surface.
Care must be taken to avoid exposure to excessive heat, harsh chemicals or
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solvents, sharp edges and abrasive surfaces. Clean the exterior with a soft, damp
cloth.
Portable safety gas detectors are life safety devices. The accuracy of ambient gas
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reading(s) is dependent upon factors such as accuracy of the calibration gas
standard used for calibration and frequency of calibration.
When HoneywellBW™ Ultra detector is equipped with Infrared (IR) sensor, do NOT
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use BW™ Ultra at an atmospheric pressure exceeding 110 kPa (1.1 bar). The IR
sensor used in the detector is intended for use at atmospheric pressure and shall
not be used in pressures exceeding 110 kPa (1.1 bar).
DO NOT rely on the Bluetooth BW™ Ultra output indication for security purposes.
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BW Ultra
CAUTION
10 User Manual