ACR Electronics ENGLISH Product Support Manual page 14

Upon lifting the switch, a very short yellow flash will indicate self test has been initiated.
Sequence of Tests
1. Check Data I/O ....................................... Beep & flash amber LED if pass
................................................................. Stop if failed
2. Check 406 MHz Synthesizer
................................................................. Beep & flash amber LED if pass
................................................................. Stop if failed
3. Check RF Power/Battery ........................ Beep & flash amber LED if pass
................................................................. Stop if failed
4. Unit turns on green LED to indicate Successful Test.
5. On the GyPSI™ 406 PLB approximately 2 seconds after green LED flash, unit will flash
amber LED and beep if valid external GPS data has been received.
A successful test result is indicated by three beeps, three yellow flashes then the green LED
flashes. If GPS data has been loaded into the PLB, an additional yellow flash & beep will
occur after the green LED flashes.
NOTE: The homing beacon at 121.5 MHz is inhibited during self test.
It is strongly recommended to test the PLB on a quarterly basis.
SELF TEST
FIGURE 5
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Y1-03-0169 Rev. B