Raymarine ST70 Instrument, Installation Manual

Page: 45 / 73

Chapter 3: Commissioning Procedures 35
Calibrating conventional transducers
Use these procedures to calibrate Depth & Temperature values for conventional
transducers.
Setting Depth offset
If you want to apply an offset to your depth readings, you MUST ensure the offset
value is correct, before relying on subsequent Depth data.
WARNING: Ensure you use the correct depth offset
The use of the correct depth offset is critical to the safety of the
vessel. If an incorrect offset value is applied, this could result in misleading
depth information being displayed with a consequent risk of running
aground. Take great care to ensure you set the correct value.
Set the correct depth offset as follows:
1. With the
Transducers found menu displayed,
select Depth . to display the Depth transducer
menu.
2. With the Depth transducer menu displayed,
scroll to the Depth Offset option, then press
OK
,
to display the Depth Offset setup page.
• Check the type and value of the offset
currently applied:
• If the offset type is what you require and the
value is correct for your boat, press
CANCEL
to return to the Depth transducer
menu, then proceed from step 6.
• Otherwise proceed from step 3.
3. If necessary, press
PAGE UP
to select the
upper (offset type) adjust box.
4. Scroll to either Water line , Keel or Transducer ,
as required. If you select Transducer , an offset
value of zero is automatically applied.
5. If you have selected:
• Either Water line or Keel, press
PAGE DN
to
select the lower (offset value) adjust box
then scroll to set the correct value.
• Transducer , ensure the offset value is zero.
6. Press
OK
to save the offset value and display the Depth transducer menu.
7. Press
CANCEL
to return to the Transducers found menu.
i
D1
1175-1
Depth
Depth Offset
Raymarine
Serial no. 211342
Press OK to select
i
D1
1
1
76-1
Press OK to accept
Depth Offset
Keel
2.5
FT
Warning! Incorrect depth offset may lead to
vessel running aground.
87099_1.book Page 35 Thursday, March 12, 2009 10:18 AM