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WARNING
USERS OF RESPIRATORS EQUIPPED WITH
THE SEMS PDA DISTRESS ALARM MUST BE
AWARE OF THE PROPER OPERATION OF
THE DISTRESS ALARM. FAILURE TO RECOG-
NIZE A MALFUNCTION OF THE SEMS PDA DIS-
TRESS ALARM AND TAKE PROPER COR-
RECTIVE ACTION MAY RESULT IN SERIOUS IN-
JURY OR DEATH.
OPERATION OF THE SEMS PDA DISTRESS ALARM
With proper batteries installed and a charged air cylinder, the SEMS
PDA distress alarm (PASS) is automatically activated when the respi-
rator is pressurized by opening the cylinder valve of the respirator. If
batteries are completely discharged or have not been installed, there
will be no light or sound indicating that the unit will not work at all.
Activation is indicated by 3 quick audible chirps from the Sensor Mod-
ule. On activation, a green light located on the Control Console, shown
in FIGURE 3, will begin to flash approximately once a second. The
SEMS PDA distress alarm is now in the automatic mode.
If the any of the batteries needs replacement, the SEMS PDA distress
alarm will indicate as follows:
• SENSOR MODULE – A single audible chirp from the Sensor Mod-
ule once every 2 seconds and the green light on the control mod-
ule will not flash.
• CONTROL CONSOLE – “BATT” will appear in the display but all
other functions will operate normally.
If any low battery condition appears at start-up, immediately change
all the batteries before use of the respirator. See the BATTERY RE-
PLACEMENT section of this instruction. If a low battery condition ap-
pears while the respirator is in use, the SEMS PDA distress alarm will
continue to operate for a period of time greater then the longest dura-
tion cylinder available for the respirator.
WARNING
THE SEMS PDA DISTRESS ALARM IS IN-
TENDED TO ASSIST IN LOCATING A PER-
SON WHO MAY BE IN A LIFE THREATEN-
ING SITUATION. FAILURE TO FOLLOW
THE INSTRUCTIONS FOR OPENING,
CHANGING ALL BATTERIES AND RE-CLOS-
ING BOTH BATTERY COMPARTMENTS MAY
RESULT IN DAMAGE WHICH COULD CAUSE
FAILURE OF THE PASS DURING A LIFE
THREATENING EMERGENCY OR COULD
CAUSE A FIRE OR EXPLOSION IN A FLAM-
MABLE OR EXPLOSIVE ATMOSPHERE POS-
SIBLY RESULTING IN SERIOUS INJURY OR
DEATH.
FIGURE 3
THE PORTABLE UNIT
RESET
MANUAL
ALARM
WITHDRAW
RESET
BUTTON
(YELLOW
INDICATOR)
MANUAL
ALARM BUTTON
(RED INDICATOR)
RED SIGNAL
LIGHT
CONSOLE
DISPLAY
GREEN SIGNAL
LIGHT
WITHDRAW
BUTTON (BLUE
INDICATOR)