PR-8
2
Sonic Tester
5
The
UP
arrow key has two functions. When the
PR-8
2
is in calibration
mode, this key is used to increase numeric values on the display. An auto-
repeat function is built in, so that when the key is held down, numeric
values will increment at an increasing rate. When the
PR-8
2
is not in
calibration mode, the
UP
arrow key switches the
SCAN
measurement
mode on and off. Refer to page 17 for an explanation of the
SCAN
measurement mode.
The
DOWN
arrow key has two functions. When the
PR-8
2
is in the
CAL
mode, this key is used to decrease numeric values on the display. An
auto-repeat function is built in, so that when the key is held down, numeric
values will decrement at an increasing rate. When the
PR-8
2
is not in
calibration mode, the
DOWN
arrow key switches the display backlight
between three available settings.
OFF
will be displayed when the backlight
is switched off.
AUTO
will be displayed when the backlight is set to
automatic mode, and
ON
will be displayed when the backlight is set to stay
on. In the
AUTO
setting, the backlight will illuminate when the
PR-8
2
is
actually making a measurement.
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