Furuno FCV-582L - Manual (Page 24)

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Note 1: All default basic ranges are restored
whenever the depth unit is changed. There-
fore, change the depth unit before chang-
ing the basic ranges.
Note 2: Ranges must be set in numerical
order. For example, if basic range 3 is 60
feet and basic range 5 is 200 feet, the basic
range which can be set for basic range 4 is
between 60 and 200 feet.
ZOOM RANGE: Select the range to zoom
in the marker and bottom zoom modes. You
may select a range between 7 and 2500 feet.
Default setting is 30 feet.
B/L RANGE: The expansion width for the
bottom-lock display can be selected to 10 feet
or 20 feet. Default setting is 20 feet.
2.3 Demonstration Display
The demonstration display lets you get ac-
quainted with the features of the FCV-582L
without connecting the transducer. You can
activate it as follows:
1. Turn on the power while pressing any key.
2. Press the [▼] key. The following display
appears:
DEMO MODE
- +: To set condition
▼ : OPTIONAL MODE
OFF ON
Figure 2-3 Demo mode display
3. Press the [+] key to select ON.
4. Reset the power. “DEMO” appears above
the depth indication on the video sounder
displays and at the top right-hand corner
on the data and graphic displays.
To return to normal operation, turn off the
demonstration display at step 3 in the above
procedure.
2.4 Bottom Level
If the depth indication is unstable in automatic
operation or the bottom echo cannot be dis-
played in reddish-brown by adjusting the gain
controls in manual operation, you may adjust
the bottom echo level detection circuit, for
both 50 kHz and 200 kHz, to stabilize the in-
dication. Note that if the level is set too low
weak echoes may be missed and if set too high
the depth indication will not be displayed.
1. Turn on the power while pressing any key.
2. Press the ALARM key three times. The
start-up screen appears and shortly there-
after the BOTTOM LEVEL display ap-
pears.
BOTTOM LEVEL
▲▼ : 50kHz
50kHz= 80(20 200)
200kHz= 80(20 200)
- + : 200kHz
Figure 2-4 Bottom level display
3. Operate appropriate key among [▲], [▼],
[+] or [–] to set level.
4. Press the POWER key to escape.