JRC JFS-280, Instruction Manual

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6-13 6 Operation Settings
6
6.1.4.5 Level Settings
This section explains how to set the minimum level that is detected as an alarm. The initial
value is set to "15".
If you set the alarm level too low, static noise may cause the alarm to operate.
Operating Procedure Press the keys "8 → 1 → 4 → 5" to go to LEVEL
settings
Use the [MULTI] knob to open the submenu for "ALARM" to do "ALARM" operations.
Turn the [MULTI] knob to move to "5. LEVEL". Press the
[MULTI] knob to open the menu for inputting values.
The numerical range is between 0 and 31, and can be
set in steps of 1.
Change the settings according to the conditions of the
sea and the type of fish school.
6.1.4.6 Amount Settings
This section explains how to set the amount that must be within the alarm range that is
detected as an alarm.
The range of settings for the amount is "Very small", "Small", "Medium", and "Large". The
percentages of the alarm area for each of these are set as "Very small = 1%", "Small = 5%",
"Medium = 10%", and "Large = 20%". The initial value is "Small".
Operating Procedure Press the keys "8 → 1 → 4 → 6" to go to AMOUNT
settings
Use the [MULTI] knob to open the submenu for
"ALARM" to do "ALARM" operations.
Turn the [MULTI] knob to move to "6. AMOUNT". Press
the [MULTI] knob to open the pulldown menu.
Change the settings according to the conditions of the
sea and the type of fish school.