Transducer Types; Depth Calibration; Depth Offset; Setting The Depth Offset - Raymarine i70 Installation & Operation Instructions

7.1 Transducer types

The transducers listed in the table below can be
calibrated using the display.
Transducer type
Depth transducers
Speed and temperature
transducers
Wind transducers
Smart transducers
Fluxgate compass
Rudder reference
42
Connection
connected via iTC-5 or Depth
pod
connected via iTC-5 or Speed
pod
connected via iTC-5 or Wind
pod
connected directly to SeaTalk
connected via iTC-5
connected via iTC-5

7.2 Depth calibration

Depth Offset

Depths are measured from the transducer to the
bottom, you can apply an offset value to the depth
data, so that the displayed depth reading represents
the depth to the bottom from either the keel (negative
offset) or the waterline (positive offset).
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 your vessel's keel, as appropriate. Then set the
appropriate depth offset value.
ng®
1 Waterline offset Values greater than zero (Positive
2 Transducer
3 Keel offset

Setting the depth offset

The depth calibration consists of setting a Depth
Offset that is relevant to your depth transducer's
installed location.
From any favorite page:
1. Select Menu.
2. Select Set-up.
3. Select Transducers Set-up.
4. Select Continue.
The instrument display will search for and display
a list of connected devices. (i.e. iTC-5, DST or
transducer pod)
5. Select the device that the transducer(s) you are
calibrating are connected to.
A list of available transducer data is displayed,
6. * Select Depth.
Important: * Step only applicable to iTC-5.
7. Select Depth Offset.
8. Select Depth From:.
A list of transducer offsets is displayed:
• Waterline
• Keel
• Transducer (default)
values) represent a waterline offset
Zero offset represents the depth
from the transducer's location
Values less than zero (Negative
values) represent a keel offset