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beacon tells Search and Rescue who you are, where you are, and that you are facing a life threatening
situation.
2.2 Self
Test
PLEASE READ ALL INSTRUCTIONS BEFORE PERFORMING ANY OF THE TESTS.
BE PREPARED TO RECORD DATA FROM THE TEST
Self test is initiated by holding the self test button (see figure 1) for more than half a second and less
than five seconds. Your beacon will sound an initial beep and green LED (Light Emitting Diode)
flash to signify the test has begun. A green LED will flash a second time to indicate that the self test
was successful.
Self tested components: Data Integrity and Memory; Check 406
MHz
Synthesizer;
RF Power/Battery; Check GPS header
If your beacon flashes two LED’s, the test has been successful. If you encounter only the initial
green LED flash alone, your beacon has failed the self test, please contact ACR Electronics or an
authorized Battery Replacement Center for servicing of your beacon.
2.2.1 Battery Witness Seal Life
ACR strongly recommend performing the self test on the
TerraFix™ 406 GPS
on a monthly basis.
If your beacon flashes an initial Red LED at the beginning of the Self Test, this indicates that your
electronic witness has been broken and you have used more than 1 hour of your battery life. While
the PLB will still operate normally in an emergency, ACR strongly recommends you have your
battery replaced and the electronic witness reset to ensure that you will have 24 hours of battery
power should you ever need to activate your unit.
NOTE: The homing beacon at 121.5 MHz is inhibited during self test.
Figure 1. Key pad Functions
Self Test Button
GPS Test Button
-
GPS I (P/N 2798.2)
-
GPS I/O (P/N 2798.4)
Off Button
Green & Red LED
GPS Interface
Press together for
more than ½ of a
second to activate
the beacon in an
emergency
ON
