User's Manual

19
6.2: GNSS Self Test Mode
WARNING
TESTING THE GNSS RECEIVER IS LIMITED TO 5 TESTS OVER THE
LIFETIME OF THE BATTERY.
TESTING THE GNSS RECEIVER EXPENDS SIGNIFICANT AMOUNTS OF
ENERGY FROM THE BATTERY PACK AND MAY TAKE UP TO 10
MINUTES TO COMPLETE.
THIS TEST MUST ONLY BE PERFORMED WHERE THE EPIRB HAS A
CLEAR AND UNOBSTRUCTED VIEW OF THE SKY. THIS IS REQUIRED
TO ALLOW THE GNSS RECEIVER TO ACQUIRE A SIGNAL FROM
SUFFICIENT SATELLITES TO ALLOW IT TO DETERMINE A POSITION.
If the user would like confidence that the GNSS receiver is operating correctly
then the test can be started by the following method. It is preferable not to
perform this test in direct sunlight as it may be make counting the LED’s
flashes at the end of the test difficult. The EPIRB must remain under
observation for the whole of the test to ensure the completion of the test is not
missed.
To enter the GNSS self test mode, perform the following procedure:
1) Rotate the Grey test key clockwise and hold for 1 second until
the indicator LED begins to rapidly flash Green.
2) Release the test switch and quickly reactivate the test switch
whilst the indicator is still rapidly flashing.
3) Hold the switch until the indicator begins flashing Green at a
slower rate, continue to hold the test key for 5 seconds.
4) Release the test switch when the indicator changes from
flashing Green to a constant Red.
The GNSS self test is now active, during the test the indicator will remain Red
and flash Green once every 5 seconds.
Successful completion of the test is displayed by the indicator flashing Green
for 10 seconds with the strobe light flashing every 2.5seconds. A failure upon
completion of the test is indicated by the indicator flashing Red for 10 seconds
with the strobe light flashing every 2.5 seconds.
The GNSS self test can be cancelled at any time by activating the Grey test
switch and holding it on for 5 seconds.
The EPIRB is limited to 5 GNSS self tests, the unit will not perform any more
than this until the battery is replaced.