Rion DA-21, Инструкция по эксплуатации

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7
Controls and Functions
(9) [LIGHT] key
Serves to control backlighting of the LCD screen. The backlight is turned
on or off depending on the key press timing. When the LCD backlight
has been activated, it will automatically turn itself off if there has been
no key activity for a certain period. (The duration of this period can be
changed with a menu setting.)
Note
When the remaining battery capacity is low and the
battery icon (page 23) is fl ashing, the backlight does
not operate.
(10) [CLEAR Ov] key
Serves to clear the overload history display. This display indicates if there
has been any overload condition between the point when the key was last
pressed and the current time (see page 24).
(11) [RECALL] key
Serves to activate the recall mode and to cancel the recall mode and return
to the main screen.
(12) [RANGE] key
Serves to activate and cancel the input range setting condition. In recall
mode, the key serves to delete the recording data selected by cursor.
(13) [MENU] key
Serves to bring up a menu screen or return to the main screen.
There are a number of menu screens which allow changing the settings of
the unit. Menu screens are organized by function category, such as input
settings, recording parameters, etc.
Key lock
Pressing and holding the [<] and [>] keys together for a few seconds ac-
tivates the key lock condition. In this condition, all keys except the [<]/
[>] keys and the [LIGHT] key are inactive. The condition is indicated by
a key lock icon that appears on the display (page 87).
To cancel the key lock condition, press and hold the [<] and [>] keys
together once more.