5-4
No Measurement
Alarm Message
10 Over range
alarm
It is an over range. Switch the range. (Note 1)
Note 1: About the current circle graph, the ship speed graph, the water
temperature graph, and the wind direction/the wind speed vector, an
over range alarm when data exceeds it to the setting range in each
11 Operation
[UNDO] key: Only when the menu screen is displayed, the [UNDO] key is
Alarm message is;
１．displaying for approx. 10 seconds.
２．sounding alarm for approx. 10 seconds at
the same time.
３．disappearing alarm message and alarm
sound by pushing the [BUZZER] key.
．
Example of display: Refer to right table
*1 Echo level lower alarm: The instrument fault is when the echo level lower alarm is generated by shallow depth (The example: It
is 100m or more shallower). Check abnormally on the 9.2 “Self Test”.
No Measurement
Alarm Message
8
Depth alarm in
which current
cannot be
measured.
1. When the depth of the A-E layer (absolute current measurement depth
of layer) is deeper than about 80% of bottom of the sea depth.
Alarm Ex.) When the depth is 200m, current measurement depth of
layer is 170m
2. Less than 5m in depth cannot be measured regardless of depth.
3. A relative current is alarmed the layer in Alarm.
Alarm Example:
Depth has changed from 300m into 200m
because it moved to a shallow place while
adjusting set depth of E layer to 170m and
measuring it.
In this case, E layer is displayed as shown
in a right picture by a red background color.
No Measurement
Alarm Message
9
Current
measurement
echo level
lower alarm
The sea when current measurement depth of layer is deeper than 200m
becomes and when the echo level of the supersonic wave lowers on the
condition such as clear, both current measurements might become
unstable.
In this case, "Current measurement echo level lower alarm" is displayed.
The displayed data maintains the last data excellently measured.
Alarm Example:
When going out offshore in addition while
setting depth of E layer to 220m and
measuring it, and entering the sea area
where the sea was clear, E layer was
displayed by a gray background color. (*1)
[UNDO] key. Can’t operate it.
Situation:
“UNDO” key is effective,
when a menu screen is displayed.
Indication: OFF with “BUZZER” key.
Red
Gray
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