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 ap-
plication program. See the instructions provided
by your organization for the correct procedure.
©
Battery backup
CAUTION! Storing a PTC-960X for long peri-
ods (over two months) without recharging 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-960X has a built-in battery backup sys-
tem 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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