first pressing the FUNC key and then pressing
the SPACE key. If your PTC’s operating system
is TCAL
®
, the backlight may or may not be avail-
able to you, depending on your organization’s
application program. See the instructions
provided by your organization for the correct
procedure.
©
Battery backup
CAUTION! Storing a PTC-960XRF for long
periods (over two months) without recharg-
ing or replacing the nickel-cadmium battery
pack drains both the battery pack and the
battery backup system. Any data or programs
loaded into the PTC’s memory will be lost.
The PTC-960XRF has a built-in battery backup
system that provides enough power to protect
data stored in the PTC’s memory when the
battery pack is being changed or if it runs out
of power. The battery backup system provides
a minimum of 1 hour of protection when the
battery pack is removed.
©
Beeper
The PTC’s beeper, which is located inside the
rear face, is used by the PTC and your applica-
tion program to warn you of problems or to
prompt you to take an action. For example, if
your application program has temporarily
turned off a key, the PTC will beep if you press
that key.
Depending on your organization’s application
software, you may be able to control the beeper’s
volume. See the manual or instructions provided
by your organization.
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