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.
WARNING
THE RESPIRATOR USER MUST IMMEDI - ATELY LEAVE THE AREA REQUIRING RESPIRATORY PROTECTION WHEN AN 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 RV 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 TO 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 I N S E R I O U S I N J U RY O R DEATH .
WARNING
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.
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