User's Manual

22 82823_UM_ 40GPSMkII_E
3 FUNCTIONAL DESCRIPTION
3.1
GENERAL
The Tron 40GPS MkII consists of upper and lower house mounted together with an equator ring with
gasket and locking pin.
Tron 40GPS MkII may be split into the following main parts:
1. EPIRB module with antenna
2. Battery module
3. Equator ring with gasket.
3.1.1
EPIRB MODULE WITH ANTENNA
The EPIRB module consists of two printed circuit boards, which are mounted in the upper housing:
1. The main board with main switch.
2. Antenna board (121.5 / 406 MHz) with indicator / flash LED.
For automatic activation of the EPIRB module, put the Tron 40GPS MkII in the upright position into the
water, and the transmission starts when the seawater completes the circuit between the two external
electrodes (sea water contacts).
When the Tron 40GPS MkII is mounted in the automatic release bracket mechanism, there
is a safety switch in the EPIRB module, a reed contact activated by a magnet in the bracket, which
disables the seawater contacts.
If the 40GPS MkII mounted in the automatic release bracket is submerged in water, the hydrostatic
release mechanism will release the Tron 40GPS MkII at a depth of 2-4 meters. The transmission will
start when the circuit between the seawater contacts is closed and the Tron 40GPS MkII is out of the
bracket.
The EPIRB module may be manually activated with the main switch, and is then independent of
seawater contacts. The EPIRB module will also operate while placed in the bracket when manually
activated.
The Tron 40GPS MkII may easily be released from the mounting bracket manually. The main switch is
also located on the main board.
The housing is made of polycarbonate.