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the 250DX is operated from a battery
source, the voltage number can be used to
determine battery life. The 250DX will
operate at voltages from 10 to 20 VDC.
Voltages in excess of 20 or less than 10
VDC cause the unit to power off.
Options. The Options Menu is a series of
linked menu functions used initially to set
your preferences. Once your preferences
are selected, it is unlikely these functions
need to be accessed during the normal
operation of the product.
The Options menu works differently
than other menu functions in that all of the
options must be cycled through in order to
return to normal operation. There are thirteen
Option menus: Contrast, Display Speed,
Battery Alarm, Bottom Black, Fish ID, Numeral
Size, Diagnostic, Units, Languages, Speed
Offset, Depth Offset, Filter and Reset.
Contrast. The Contrast function allows the
user to control the level of contrast of the
LCD display. The 250DX will automatically
adjust the display contrast to compensate for
changing ambient temperatures; however,
some situations may occur where manual
adjustment will provide a higher level of contrast.
Eleven contrast settings, +5 to -5, are
possible. The display contrast will change as
the adjustment is made so the optimum level
of contrast can be achieved. Use the ARROW
buttons to highlight the desired selection.
The 250DX will reset to the factory setting
when the unit is powered off.
19
USING THE 250DX
MENU FUNCTIONS