4. Select
Speed Transducer
.
A list of transducers is displayed.
5. Select your speed transducer from the list.
Checking the sonar
Sonar checks are made using the fishfinder
application.
1. Select a fishfinder page from the Homescreen.
2. Check the fishfinder display.
With the fishfinder active you should see:
• Depth reading (indicates the transducer is
working). The depth is shown in a databox in
the bottom left of the screen.
If the databox is not present it can be turned
on from the Presentation menu:
Menu >
Presentation > Databoxes Set-up
.
Fishfinder Transducer Calibration
Your fishfinder transducer must be calibrated
correctly to achieve accurate depth readings.
The multifunction display receives the image from
a sonar module which processes sonar signals
from a transducer mounted in the water. If the
transducer is equipped with a speed paddle wheel
and temperature-sensing thermistor, the sonar
module calculates speed and temperature. To
ensure accurate readings, it may be necessary to
calibrate the transducer(s) by applying offsets to
depth, speed and temperature. As these settings
are held in the sonar module and relate to the
transducer, they are applied system-wide.
Depth Offset
Depths are measured from the transducer to the sea
bed, but you can apply an offset value to the depth
data, so that the displayed depth reading represents
the depth to the sea bed from either the keel or the
waterline.
Before attempting to set a waterline or keel
offset, find out the vertical separation between the
transducer and either the waterline or the bottom of
the keel on your vessel, as appropriate. Then set the
appropriate depth offset value.
D9343--2
1
2
3
1
Waterline offset
2
Transducer / Zero offset
3
Keel offset
If an offset is not applied, displayed depth readings
represent the distance from the transducer to the
sea bed.
Setting the depth offset
From the fishfinder application:
1. Select
Menu
.
2. Select
Set-up
.
3. Select
Transducer Set-up
.
4. Select
Depth Offset
.
The depth offset numeric adjust control is
displayed.
5. Adjust the offset to the required value.
Setting the speed offset
From the fishfinder application:
1. Select
Menu
.
2. Select
Set-up
.
3. Select
Transducer Set-up
.
4. Select
Speed Offset
.
The speed offset numeric adjust control is
displayed.
5. Adjust the offset to the required value.
Setting the Temperature offset
1. Select
Menu
.
2. Select
Set-up
.
3. Select
Transducer Set-up
.
4. Select
Temperature Offset
.
The temperature offset numeric adjust control is
displayed.
5. Adjust the offset to the required value.
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