Lowrance electronic LMS-480M, LMS-480DF manual Calibrate Speed, To turn the fish alarm on

Models: LMS-480DF LMS-480M

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Sonar Alarms menu with Fish Alarm selected. The check box to the left

is blank, indicating the alarm is turned off.

To turn the fish alarm on:

1.Press MENUMENU↓ to ALARMSENT↓ to SONAR ALARMSENT.

2.Press ↓ to FISH ALARMENTEXITEXITEXIT.

3.To turn off the alarm, press MENUMENU↓ to ALARMSENT↓ to

SONAR ALARMSENT↓ to FISH ALARMENTEXITEXITEXIT.

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.

For example, if 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.

A good way to gauge your speed sensor's performance is to compare its reading with the ground speed measured by your unit's GPS functions. When you make a run to compare GPS ground speed to speed sensor speed, perform your test in relatively calm water free of current, if pos- sible. (Unless, of course, you are taking the current speed into consid- eration when making your calculation.) After you have a correction fig- ure, here's how to enter it:

1.Press MENUMENU↓ to SONAR SETUPENT↓ to CALIBRATE WATER

SPEEDENT.

2.Enter the number you calculated earlier: press ↑ or ↓ to change the first character (+ or –), then press → to move the cursor to the next number and repeat until the percentage is correct, then press EXIT.

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Lowrance electronic LMS-480M, LMS-480DF Calibrate Speed, To turn the fish alarm on, Press ↓ to Fish Alarmentexitexitexit