6
There are two independent end of service indicator alarms: the VI-
BRALERT alarm mounted inside the breathing regulator and the
electronic HEADS-UP DISPLAY end of service time indicator. When
actuated, the VIBRALERT alarm vibrates the breathing regulator and
facepiece to warn the user of diminishing air supply by both an au-
dible and a tactile warning. The HEADS-UP DISPLAY provides a visual
monitor of the air supply with four lights that appear just below the
facepiece field of vision. A separate low battery light warns the user
that the battery must be changed. The HEADS-UP DISPLAY lights
indicate the cylinder air supply is full to three-quarters with constant
green lights, one-half cylinder with a slowly flashing yellow light, and
warns the user that approximately one quarter or 25% of full cylinder
pressure remains with a rapidly flashing red light. The HEADS-UP
DISPLAY detects cylinder pressure directly and is totally independent
of the VIBRALERT.
Both the VIBRALERT and the electronic HEADS-UP DISPLAY end of
service time indicator alarms actuate to warn the user that approxi-
mately 25% of full cylinder pressure remains in the cylinder and valve
assembly. In other words, the alarms actuate when approximately 3/
4 of the total air supply has been used. Although both the VIBRALERT
and electronic HEADS-UP DISPLAY end of service indicator alarms
are set to actuate at the US Government mandated set point of ap-
proximately 25% of full rated service pressure, they are completely
independent of each other and therefore may not actuate at precisely
the same moment. As stated above, the VIBRALERT end of service
indicator alarm will also actuate if the primary pressure reducer mal-
functions or becomes blocked. In this case, the VIBRALERT alarm
alone will actuate and the HEADS-UP DISPLAY will not. Whenever
any alarm actuates, the VIBRALERT end of service indicator alarm
or the HEADS-UP DISPLAY, the user must immediately leave the area
requiring respiratory protection.
WARNING
THE RESPIRATOR USER MUST IMMEDI-
ATELY LEAVE THE AREA REQUIRING
RESPIRATORY PROTECTION WHEN AN
END OF SERVICE INDICATOR ALARM AC-
TUATES. ACTUATION OF AN END OF
SERVICE INDICATOR ALARM WARNS THAT
APPROXIMATELY 25% OF FULL PRESSURE
REMAINS IN THE AIR SUPPLY CYLINDER
(THAT IS, APPROXIMATELY 3/4 OF THE
TOTAL AIR SUPPLY HAS BEEN USED) OR
THAT THERE IS A MALFUNCTION IN THE
RESPIRATOR. A DELAY IN LEAVING THE
AREA AFTER ALARM ACTUATION MAY RE-
SULT IN SERIOUS INJURY OR DEATH.
GENERAL DESCRIPTION CONTINUED...
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