User's Manual

10
DRAFT COPY
up and down the list of logged-in respirator users and presses
the “EVAC” button when the selected users are highlighted in
the display.
c) The respirator users who receive the “EVAC” message must
press the RESET button on the Portable Unit to acknowledge
the message.
d) The Base Station listing of logged-in users will display “CONF”
with each respirator user who has responded to the “EVAC”
message.
3. Air Supply Monitoring
a) When the air supply cylinder reaches one-quarter of full pres-
sure, the alert sound will occur and the Portable Unit will display
“LOW AIR”. A low air signal will be sent to the Base Station
within ten seconds. This end of service time indicator (EOSTI)
alarm cannot be silenced by the user until the user leaves the
hazardous area and shuts down the respirator.
b) The Base Station operator must press “ACK” on the Base Sta-
tion to acknowledge the user’s low air signal.