4.Distress Alarm
a)If the user is in distress or becomes immobile, the SEMS PDA distress alarm will operate in conjunction with the Portable Unit. If the distress alarm is activated, either by the user pressing and holding the MANUAL ALARM for at least two seconds, or from the user being immobile for the required time duration, the Portable Unit will send a distress signal to the Base Sta- tion. The distress alarm will override all other messages and actions of the Portable Unit.
b)When the Base Station acknowledges the user’s distress sig- nal by pressing the “ACK” button on the Base Station, the Con- trol Console will respond by displaying “PASS” and continuing to sound the distress alarm on the respirator. The distress alarm will continue until the user shuts down the respirator.
5.Evacuation
a)If the respirator users are required to leave the hazardous area, the Base Station operator can send an evacuation message to the Portable Units of
b)The Portable Unit will emit the alert sound and “EVAC” will appear flashing in the Control Console display.
c)When an “EVAC” message appears on the Control Console display, the respirator user must press twice the RESET but- ton on the Control Console to respond to the evacuation mes- sage. “EVAC” will continue to appear in the display of the Con- trol Console until the user leaves the hazardous area and shuts down the respirator.
6.Withdraw
a)The respirator user may choose to leave the hazardous area. Pressing and holding the WITHDRAW button on the Control Console will send that message to the Base Station.
b)When the Base Station receives a user withdrawal message, the operator presses the “ACK” button on the Base Station to respond.
c)When the Portable Unit receives the acknowledgment re- sponse, the Control Console will display
7.Shutdown
a)After leaving the hazardous area and confirming that respira- tor use is no longer required, doff the respirator according the user instructions provided with the respirator.
b)Close the cylinder valve.
c)Press the RESET button twice.
d)The Control Console will sound the alert tone and flash “OFF” in the display. The Portable Unit is now off.
8.Batteries
Battery operation is as stated in the SEMS PDA distress alarm section of this instruction.
WARNING
IF THE LOW BATTERY INDICATION OCCURS AT ANY TIME DURING USE OF THE RESPIRATOR, THE BATTERIES MUST BE CHANGED BEFORE THE NEXT USE OF THE RESPIRATOR. USE OF A RESPIRATOR WITH DEPLETED BATTERIES MAY LEAD TO A FAILURE OF THE RESPIRA- TOR WHICH COULD RESULT IN SERIOUS IN- JURY OR DEATH.
13