INITIAL RECEIVER CONFIGURATION
Display depth units (inches, feet and inches, or centimeters) may be
changed while holding 
and pressing 
. For each press, one of three units will display. To change the passive Power frequency, press and
hold 
then press 
to toggle between 50 or 60 Hz as displayed in the lower left corner of the display.
To change the Null bar graph display mode, press and hold 
then
press to toggle between normal Null bar graph display (Null flag will flash) and inverse Null bar graph display (Null flag is solid). See section About Trace Modes (page 11) for further information.
RECEIVER BATTERY TEST
Battery Test
Indicator
Battery Level
Mark
The Receiver batteries are tested for two seconds every time the unit is
turned on. The time interval can be extended by pressing and holding 
. During the battery test, the bar graph should extend to the right of the battery level mark, otherwise replace the batteries.
Note: When batteries are low, the battery test indicator 
will flash.
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