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.
Standards and Certifications
The Honeywell BW™ Ultra gas detector is in conformity with the following standards and
certifications.
Approvals.
Approved by UL to both U.S. and Canadian Standards
UL 913, 8th Edition
UL 60079-0, 7th Edition
UL 60079-1, 7th Edition
UL 60079-11, 6th Edition
ANSI/ISA 60079-29-1 (12.13.01) - 2013
CSA C22.2 No.152-M1984 (R2016)
CSA C22.2 No. 60079-0:19
CSA C22.2 No. 60079-11:14
CSA C22.2 No. 60079-1:16
UL: E480011
Class I, Division I, Group A, B, C and D, Temperature code T4, -40 ≤ Tamb ≤ +50°C
Class I, Zone 0, AEx ia IIC T4 Ga, -40 ≤ Tamb ≤ +50°C (without LEL and IR sensor installed)
Class I, Zone 0, AEx da ia IIC T4 Ga, -40 ≤ Tamb ≤ +50°C (with LEL sensor installed and without
IR sensor installed)
Class I, Zone 0, AEx ia IIC T4 Ga, -20°C ≤ Tamb ≤ +50°C (with IR sensor installed and without
LEL sensor installed)
Class I, Zone 0, AEx da ia IIC T4 Ga, -20°C ≤ Tamb ≤ +50°C (with LEL and IR sensor installed)
BW Ultra 41 User Manual
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