Page 21 of 28
P/N 595369-01 Rev B 07/19
WARNING
KEEP THE ANTENNAS OF HAND-HELD
RADIOS AT LEAST SIX (6) INCHES AWAY
FROM THE CONTROL CONSOLE AND THE
SENSOR MODULE OF THE PASS DEVICE WHEN
TRANSMITTING. CLOSE PROXIMITY OF RADIO
EQUIPMENT TO THE PASS DEVICE DURING
RADIO TRANSMISSION MAY CAUSE THE UNIT
TO MALFUNCTION. FAILURE TO RECOGNIZE
A MALFUNCTION OF THE PASS DEVICE AND
TAKE THE PROPER CORRECTIVE ACTION MAY
RESULT IN A NON-WORKING PASS DEVICE,
WHICH WILL NOT SOUND IF THE USER STOPS
MOVING AND MAY 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 PASS DEVICE. CLOSE
PROXIMITY OF RADIO EQUIPMENT TO THE
PASS DEVICE DURING RADIO TRANSMISSION
MAY CAUSE THE UNIT TO MALFUNCTION.
FAILURE TO RECOGNIZE A MALFUNCTION OF
THE PASS DEVICE AND TAKE THE PROPER
CORRECTIVE ACTION MAY RESULT IN A NON-
WORKING PASS DEVICE, WHICH WILL NOT
SOUND IF THE USER STOPS MOVING AND MAY
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 PASS device
may be subject to the effects of RFI. Radio transmissions from the antennas of radios
including those used by re ghters, police, and other public safety related personnel
may produce RFI in the PASS device. RFI may occur while the radio is transmitting if
the respirator equipped with the PASS device 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.
Be aware of the symptoms of RFI. A PASS device 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
ash without sounding the alarm. In rare circumstances, a sounding alarm may stop.
If the PASS device 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 PASS device.
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 PASS device will typically resume
normal operation after experiencing RFI.
If the PASS device is affected by RFI when the respirator air supply is turned off or
the cylinder is empty, the PASS device could be turned off during use. If this occurs,
depress the red Manual Alarm Button to activate the alarm.
HAND HELD
RECEIVER
SENSOR
MODULE
CONTROL
CONSOLE
KEEP RADIO ANTENNAS AT LEAST
SIX (6) INCHES FROM THESE AREAS
RFI WARNING AREAS
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