Interphace ULTRASCAN PC90, Operation Manual

Page: 33 / 56

33
Using the Alarm
Ultrascan PC90 provides an audible alarm to alert you
to nearby and shallow features. VERT, HORZ and
DOWN displays use independent alarm settings.
VSPLIT and HSPLIT displays use the vertical and
horizontal alarm settings, respectively.
Change the alarm settings by selecting Alarm from
the Adjust menu. Turn the alarm on and off by
clicking on the Alarm On box. Select an alarm
distance by moving the slide bar.
The distance covered by the alarm will appear in the
scale bar of the display as a solid magenta bar, and a
magenta line or arc will cross the display at the
specified distance or depth. Vertical and downlooker
alarms are triggered whenever a solidly displayed
target appears shallower than the depth indicated by
the alarm bar. The horizontal alarm is triggered
whenever a solidly displayed target appears closer to
the boat than the range indicated by the alarm arc.
Once the Alarm has been triggered, it will continue
sounding until it has been reset. Reset the Alarm by
clicking on the Clear Alarm button in the Alarm box
or by clicking on the yellow light bulb in the Toolbar.
NOTE
An alarm setting of zero is equivalent to
having the alarm off.
Vertical Alarm Bar
Horizontal Alarm Bar