Lowrance electronic LMS-520C - Manual (Page 77)

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NMEA 2000 Alarms highlighted on Alarms menu (left). NMEA 2000
Alarms menu (center). Alarm Status page (right).
3. To enable the Empty Alarm, highlight the
E
MPTY
A
LARM
Enabled box
and press
ENT to turn on (check) the alarm
. Press → to the Percent box and
press
ENT
. Use the ↑ ↓ keys to select the first number, then press → to
move to the next number. When the desired percentage has been en-
tered, press
ENT
.
Tip
You do not have to set both the Full and Empty alarms. Choose
both Full and Empty alarms or activate them individually.
Calibrate Speed
The speed sensor can be calibrated to compensate for inaccuracies. Be-
fore you change the setting, first calculate the percentage that the
speed is off. You will enter this percentage in a moment.
If, for example, you figure the sensor is reading 10 percent faster than
actual speed, you will enter – 10 in the calibration window. If the sen-
sor is reading 5 percent slower than true speed, you will enter + 5 in
the window.
Calibrate Water Speed highlighted on Sonar Setup menu (left). Cali-
brate Speed dialog box (right).