Long Self-Test (Gnss Variants Only) - mcmurdo Smartfind G8 AIS User Manual

7.2.2

Long self-test (GNSS variants only)

A long self-test consumes battery life and can only be performed 20 times per
battery replacement. You should only run a long self-test if you suspect the
GNSS receiver is faulty. Choose a location where the EPIRB may be expected
to acquire a GNSS satellite signal – see page 13.
The long self-test sequence proceeds as follows:
1. Press the TEST button for 10 seconds until the green LED lights for 2
seconds and then release. If the green LED is followed by a long flash
from the red LED, the maximum number of long self-tests has been
exceeded and self-test is immediately terminated.
WARNING – If a rapid sequence of Red LED flashes occurs, the TEST
button has been pressed for too long. Release pressure on the button,
wait 5 seconds, and then repeat the procedure.
If you continue to apply pressure to the button, the beacon remains in a
fault condition, the self-test will not be activated, and it will drain current
from the battery.
2. A short flash of the red LED indicates that the GNSS receiver is
searching for satellite signals and calculating a valid position fix.
3. Once a valid position has been determined, a 406 MHz test
transmission containing the position is sent out. If the EPIRB has AIS
capabilities, a similar test transmission is sent out using the AIS
frequencies.
4. The result of the self-test is indicated by the flashing of the white strobe
lights or the red LED according to the following table. The number of
times the strobe lights flash is an indication of the number of long self-
tests remaining.
Indicator
Strobe
Strobe
Red LED
If the EPIRB passes short self-test but fails the long self-test, it is advisable to
have it serviced by an Approved Service Agent. It will still generate an alert in
an emergency but it may not provide precise position information. This may
delay a rescue as the possible search area is much larger.
No. of
Meaning
flashes
Long self-test passed – less than 10 tests performed.
3
Long self-test passed –10 or more tests performed
2
Self-test failed – no position found
1
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