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Chapter 4: Calibration
23
Chapter 4: Calibration
4.1 Introduction
The procedures in this Chapter must be carried out before the
equipment is used operationally, to optimise the performance of the
instrument with the vessel.
Calibration information is presented in flow chart form. The flow charts
show the various calibration screens and key presses necessary to carry
out calibration. All key presses are momentary unless otherwise stated.
EMC conformance
• Always check the installation before going to sea to make sure that it
is not affected by radio transmissions, engine starting etc.
4.2 User calibration
User calibration enables you to:
• Set the depth display response. Use higher response values when
boating in conditions requiring rapid updates of depth information
(e.g. inshore, especially when travelling at high speed). Use slower
response values when you require an average depth over a longer
period of time (e.g. deep sea cruising).
• Set the required units for depth readings. Either FT (feet), M (metres)
or FA (fathoms).
• Set the required depth offset.
• Lock the shallow alarm, to prevent unauthorised changes to any
normal settings.
Power up the instrument then follow the procedure in the User
calibration flow diagram.
158_2c04.p65 01/05/01, 13:5723