Operation
Page 18
3.12 Handling alarms
The
transceiver performs self checking functions continuously. If a self check fails an alarm will occur. Possible
alarm conditions are listed in Table 2.
Table 2
Alarm conditions
A new alarm will be indicated by display of the alarm notification screen (see Figure 16). The alarm icon in the
status bar will flash whilst an alarm is active and not acknowledged by the user.
Figure 16 Alarm notification screen
Alarm condition
Description
Transmitter malfunction
This alarm can occur if there is a fault with the transmitter or if
the antenna VSWR exceeds allowable limits. The alarm will be
cleared if the transmitter recovers normal operation or the VSWR
measurement returns to an allowable value. If this alarm condi-
tion persists contact your dealer or installer.
Antenna VSWR exceeds limit
This alarm condition can occur if the VSWR (Voltage Standing
Wave Ratio) of the AIS antenna exceeds pre-defined limits. This
alarm is cleared if the VSWR returns to an allowable value. If this
alarm condition persists contact your dealer or installer.
Receiver channel
x
malfunc-
tion
This alarm occurs should the receiver hardware malfunction. The
receiver is identified by the value of x. If the receiver returns to
normal operation this alarm will be cleared. If this alarm condition
persists contact your dealer or installer.
External EPFS lost
This alarm occurs if the position from the external Electronic
Position Fixing System (i.e. GNSS) is invalid or lost.
No sensor position in use
This alarm occurs if the transceiver has no valid position informa-
tion from any connected sensor.
No valid COG information
This alarm occurs if the transceiver has no valid Course Over
Ground information from any connected sensor.
No valid SOG information
This alarm occurs if the transceiver has no valid Speed Over
Ground information from any connected sensor.
Heading lost or invalid
This alarm occurs if the transceiver has no valid heading infor-
mation from any connected sensor, or if the heading is unde-
fined.
No valid ROT information
This alarm occurs if the transceiver has no Rate Of Turn informa-
tion from connected sensors or via internal calculation.
13:20:47
AL ARM NOTIFIC ATION:
ID ALARM
35:
No valid ROT information
32: Heading
lost/invalid
25:
Ex ternal EPFS lost
OK
GPS
INT
G oto List
Ack
