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If the SEMS PDA distress alarm is affected by RFI when the respirator
air supply is turned off or the cylinder is empty, the distress alarm
could be turned off during use. If this occurs, depress the RED Manual
Alarm Button and hold at least two seconds to activate the alarm.
IF THE SYMPTOMS OF RFI OCCUR, THE RESPIRATOR USER
MUST CHECK THE SEMS PDA DISTRESS ALARM TO VERIFY THAT
IT IS FUNCTIONING PROPERLY. IF THE GREEN LIGHT ON THE
CONTROL CONSOLE DOES NOT RESUME FLASHING IN THE
NORMAL MANNER AFTER EXPERIENCING THE SYMPTOMS OF
RFI, OR IF THE UNIT CONTINUES TO MALFUNCTION IN ANY
OTHER WAY, PROCEED TO A SAFE AREA, REMOVE THE RESPI-
RATOR FROM SERVICE AND TAG FOR REPAIR BY AUTHORIZED
PERSONNEL.
Minimize or eliminate the effects of RFI by protecting the SEMS PDA
with the following steps:
• Maintain a safe distance from a base station transmitting antenna
or a truck mounted radio antenna.
• Keep the antennas of hand held radios at least six (6) inches away
from the CONTROL CONSOLE or the SENSOR MODULE (See
FIGURE 2).
FIGURE 2
RFI WARNING AREAS
SENSOR
MODULE
CONTROL
CONSOLE
KEEP RADIO ANTENNAS AT LEAST
SIX (6) INCHES FROM THESE AREAS
WARNING
BE AWARE OF THE POTENTIAL EFFECT OF
RADIO TRANSMISSIONS FROM BASE STATION
OR TRUCK MOUNT RADIOS WHEN USING A
RESPIRATOR WITH THE SEMS PDA DISTRESS
ALARM. Close proximity of RADIO EQUIPMENT
to the SEMS PDA DISTRESS ALARM during ra-
dio transmission may cause the unit to MAL-
FUNCTION. FAILURE TO RECOGNIZE A MAL-
FUNCTION OF THE SEMS PDA DISTRESS
ALARM AND TAKE THE PROPER CORRECTIVE
ACTION MAY RESULT A NONWORKING DIS-
TRESS ALARM WHICH WILL NOT SOUND IF THE
USER STOPS MOVING AND LEAD TO SERIOUS
INJURY OR DEATH.