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OTHER OPERATIONAL FEATURES
END OF SERVICE TIME INDICATOR
The SEMS PDA distress alarm also provides an electronic end of ser-
vice time indicator and cylinder pressure display as follows:
1/2 full cylinder
When the air supply cylinder has reached 1/2 full capacity, the
audible signal will sound and the display will read "1/2 AIR" for 10
seconds.
1/4 full cylinder
When the air supply cylinder has reached 1/4 full capacity, the
audible signal will sound and the display will read "LOW AIR" and
then flash the remaining cylinder air pressure in psig until the user
responds by pressing the RESET button. However, the alarm will
continue to repeat actuation until the system is shut down or until
the unit detects no movement by the user at which time the SEMS
PDA distress alarm sequence will begin with PRE ALARM and
FULL ALARM as stated above.
Cylinder pressure display
Pressing and holding the RESET at any time will show the ap-
proximate cylinder pressure remaining in psig on the display.
BATTERY TEST
When the SEMS PDA distress alarm is in the off condition (cylinder
valve closed with no flashing green lights, the batteries in the Sensor
Module can be checked by depressing and holding the reset button
on the console.
A green LED will illuminate on the console to indicate sufficient battery
power remaining; a red light indicates that the batteries must be re-
placed before the respirator is to be used again.
THE RESPIRATOR USER MUST IMMEDI-
ATELY LEAVE THE AREA REQUIRING
R E S P I R ATO RY P R O T E C T I O N W H E N A N
E N D O F S E RV I C E I N D I C AT O R A L A R M
ACTUATES. ACTUATION OF AN END OF
S E R V I C E I N D I C ATO R A L A R M WA R N S
T H AT A P P R O X I M AT E LY 2 5 % O F F U L L
PRESSURE REMAINS IN THE AIR SUPPLY
C Y L I N D E R ( T H AT I S , A P P R O X I M AT E LY
3 / 4 O F T H E T O TA L A I R S U P P LY H A S
BEEN USED). A DELAY IN LEAVING THE
A R E A A F T E R A L A R M A C T U AT I O N M AY
R E S U LT
DEATH.
FAILURE TO REPLACE THE BATTERIES AND/
OR CONTINUING WITH MULTIPLE USES OF
THE RESPIRATOR AFTER THE LOW BAT-
TERY CONDITION HAS BEEN INDICATED BY
THE SEMS PDA DISTRESS ALARM MAY RE-
SULT IN FAILURE OF THE SEMS PDA DIS-
TRESS ALARM DURING USE AND POS-
SIBLE INJURY OR DEATH OF THE USER.
11
WARNING
I N
S E R I O U S
I N J U RY
WARNING
O R
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