Operation Manual

Operational procedures
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850-165186 / Rev.B
How to define echo sounder range
There are two parameters for range:
• Range start: This is the upper depth from which the echo
sounder will provide its presentation.
• Range: This is the vertical depth range for the echo sounder.
ThePI54alsooffersaPhased range function, where the Range
is fixed, but the Range start is modified.
The Range and Range start parameters can be manually
controlled from the Echo presentation setup dialogue. In most
cases, you will however only use the buttons on the keypad.
Access to the dialogue
1 Make sure thast you have an echo sounder presentation in
your active window.
2 Press the ADJ button to open the Echo presentation
setup.
The two parameters in question are located at the top of the
parameter list.
Standard mode
In this mode, the Range start is fixed. It is normally set to 0
meters, and if you wish to use another value, you must def ine
this manually in the Echo presentation setup dialogue.
1 Press the STND button.
2 Press the + and - buttons to change the range, or
3 Press the numerical buttons (1 to 9) to change the range.
4 Press the 0 button to enable Auto range.
When you reach the upper and lower range limits, the echo
sounder will automatically shift to Auto range.
Phased range mode
In this mode, the Range start is variable, and the Range is
fixed.
1 Press the SHIFT button.
2 Press the + and - buttons to change the Range start value.
3 Press the numerical buttons (1 to 9) to change the range.
4 Press the 0 button to enable Auto start range.