Eagle Electronics 502cDF manual Calibrate Speed, Fish Alarm, To turn the fish alarm on

Fish Alarm

Use the fish alarm for a distinctive audible alarm when fish or other suspended objects are detected by the Fish I.D. feature. Fish I.D. must be turned on for the Fish Alarm to work. A different tone sounds for each fish symbol size shown on the display.

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.From the Sonar Alarms menu, press ↓ to FISH ALARMENT. Press EXIT repeatedly to get back to the main page display.

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, you are taking the current speed into consideration when making your calculation. After you have a correction figure, you are ready to calibrate the speed sensor.

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