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1.5.0 TESTING THE AU9 – TRANSMISSION & BATTERY
Fig. 13
1.5.1 Checking the battery
The unit can be tested to check the battery status and also to check correct signal transmission, this is
achieved as follows:
Switch the unit OFF by sliding the side arming switch UP, the unit will ‘BLEEP’ once to indicate it is
switched OFF. With the unit switched ‘OFF’ the unit can be tested by pressing and holding down the
round rubber activation button on the front, the LEDs on the antenna will flash GREEN to indicate the
battery is OK, RED if the battery needs replacing and RED/GREEN if the battery is starting to run low. At
the same time the unit will transmit a low power signal on 121.5MHz which can be checked on a Sea
Marshall® Crewguard MKII receiver. NOTE - this low power signal will radiate to approx 30m around you
(tx = 30m on the label).
1.5.2 Low battery indicator
As well as the above manual check the unit has an automated battery status indicator. In the idle state,
when the unit is not transmitting, the unit will automatically indicate it has a low powered battery
through the medium of a short infrequent ‘BEEP’ (nominally every 15 seconds), also a flashing
RED
led.
The battery should be replaced immediately. Manually check your batteries before and after every use
1.5.3
1.5.3 Battery change process
A complete service/battery change pack is available from your local stockist.
Battery types:
1.
AU9, ‘100mW’ = CR AA lithium, separate cells. NOTE – these are special batteries with
reverse terminals, check you have the terminals correctly aligned when fitting. The
manufacturer cannot be held responsible for damage caused by incorrect fitting of
battery.
2.
AU9, ‘500mW’ = CR AA Manganese dioxide lithium, battery pack with connector fitted.
