User's Manual

17
6: Maintenance
6.1: Self Test Mode
WARNING
TEST TRANSMISSIONS ON THE HOMER FREQUENCY OF 121.5MHz
ARE LIMTED, BY THE INTERNATIONAL RADIO REGULATIONS, TO
WITHIN THE FIRST FIVE MINUTES OF AN HOUR.
It is recommended that the EPIRB is tested not more than once a month.
The EPIRB self test mode can be initiated by rotating the Grey test switch
clockwise and holding for 1 second, until the indicator begins to rapidly flash
Green. The test switch should be released once the indicator begins to flash
Green.
This will initiate a self test; be prepared to record the number of indicator
flashes upon completion of the test.
The self test monitors the 121.5MHz homer RF power, initiates a satellite
transmission in order to measure key performance parameters, will monitor
the 406MHz RF power, synthesiser lock and battery voltage under load. The
self test message is designed to prevent the satellite from forwarding an alert
message during self test. After the satellite transmission the strobe light is
flashed, demonstrating operation.
A successful test is determined by a series of Green indicator flashes –
between one and six flashes, this sequence is repeated after a 2 second
delay. A failure is determined by a series if Red indicator flashes – between
one and five flashes, this sequence is repeated after a 2 second delay.