Page 27 of 36
P/N 595289-01 Rev B 5/15
WARNING
KEEP THE ANTENNAS OF HAND-HELD RADIOS
AT LEAST SIX (6) INCHES AWAY FROM THE
CONTROL CONSOLE AND THE SENSOR
MODULE OF THE SEMS II DISTRESS ALARM
WHEN TRANSMITTING. CLOSE PROXIMITY OF
RADIO EQUIPMENT TO THE SEMS II DISTRESS
ALARM DURING RADIO TRANSMISSION MAY
CAUSE THE UNIT TO MALFUNCTION. FAILURE
TO RECOGNIZE A MALFUNCTION OF THE
SEMS II DISTRESS ALARM AND TAKE THE
PROPER CORRECTIVE ACTION MAY RESULT A
NONWORKING DISTRESS ALARM WHICH WILL
NOT SOUND IF THE USER STOPS MOVING AND
LEAD TO SERIOUS INJURY OR DEATH.
WARNING
BE AWARE OF THE POTENTIAL EFFECT
OF RADIO TRANSMISSIONS FROM BASE
STATION OR TRUCK MOUNT RADIOS WHEN
USING A RESPIRATOR WITH THE SEMS II
DISTRESS ALARM. CLOSE PROXIMITY OF
RADIO EQUIPMENT TO THE SEMS II DISTRESS
ALARM DURING RADIO TRANSMISSION MAY
CAUSE THE UNIT TO MALFUNCTION. FAILURE
TO RECOGNIZE A MALFUNCTION OF THE
SEMS II DISTRESS ALARM AND TAKE THE
PROPER CORRECTIVE ACTION MAY RESULT A
NONWORKING DISTRESS ALARM WHICH WILL
NOT SOUND IF THE USER STOPS MOVING AND
LEAD TO SERIOUS INJURY OR DEATH.
DETECTING AND AVOIDING
RADIO FREQUENCY INTERFERENCE
When any electronic device is adversely affected by radio waves, Radio Frequency
Interference (RFI) is said to have occurred. All electronic devices like the SEMS II
distress alarm may be subject to the effects of RFI. Radio transmissions from the
antennas of radios including those used by fire fighters, police and other public safety
related personnel may produce RFI in the SEMS II distress alarm. RFI may occur while
the radio is transmitting if the respirator equipped with the SEMS II distress alarm is
in close proximity to a base station or high-powered vehicle mounted radio, or if the
antenna of a personal portable hand held radio is touching or within six (6) inches of
the Control Console or Sensor Module of the SEMS II distress alarm.
Be aware of the symptoms of RFI. A SEMS II distress alarm affected by RFI may
temporarily give false indications such as the sudden sounding of the loud continuous
three-tone chirp of the full alarm. In some instances the lights on the control console
may flash without sounding the alarm. In rare circumstances, an alarm which was
sounding may stop.
If the SEMS II distress alarm exhibits any of the symptoms of RFI, identify the source
of the RFI and do the following:
–
If the symptoms of RFI occur when standing near a base station transmitting
antenna or a truck mounted radio antenna, move away from the antenna until
the symptoms stop.
–
If the symptoms of RFI occur while transmitting on a hand-held radio, move the
radio away from the SEMS II distress alarm .
CHECK THE CONTROL CONSOLE AND BE CERTAIN THE GREEN LIGHT IS
FLASHING NORMALLY WHEN THE INTERFERENCE STOPS, REGARDLESS OF
THE SOURCE.
In normal usage with the air cylinder open, the SEMS II distress alarm will typically
resume normal operation after experiencing RFI.
If the SEMS II 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 to activate the alarm.
IF THE SYMPTOMS OF RFI OCCUR, THE RESPIRATOR USER MUST CHECK THE
SEMS II DISTRESS ALARM TO VERIFY THAT IT IS FUNCTIONING PROPERLY. IF
THE GREEN LIGHT ON THE CONTROL CONSOLE DOES NOT RESUME FLASH-
ING 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 RESPIRATOR FROM SERVICE AND TAG FOR
REPAIR BY AUTHORIZED PERSONNEL.
HAND HELD
RECEIVER
SENSOR
MODULE
CONTROL
CONSOLE
KEEP RADIO ANTENNAS AT LEAST
SIX (6) INCHES FROM THESE AREAS
RFI WARNING AREAS
