HP 48G - Page 33

TIME
lets you control the calculator’s clock and set
alarmsforappointments or othertime-delayed events.
To Set the System Clock: Press (=]TIME), highlight
Set t ime, dat e, andpress @M. Fillineach
field asitis highlighted (move the highlight, as needed).
For AM/FM (and for the date format) use [I[HE. If
finished, accepts; aborts.
There are two kinds of alarms—appointmentalarms
and control alarms. An appointment alarm will dis-
play a (text) message and beep at you for about 15
seconds; a control alarm will simply evaluate a speci-
fied object, such as a program.
Setting Alarms: To set an alarm, press and
select 52t al arm... Then, in the MEZSRGE: field,
for an appointment alarm, enter a string (e.qg. "Phone
hiome"); or, for a control alarm, enter the object you
want evaluated at the specified time. Specify time,
date and repeat interval,* then press I[HNL.
Acknowledging Alarms: You must acknowledge
appointment alarms, but not control alarms. If you
catch an appointment alarm while it's beeping, press
any key to acknowledge it. If its beeping has stopped
(the « will show it as past-due), press for the
message, then [EIHll to acknowledgeiit. (To acknow-
ledge more than one such alarm, use [THGN.)
also offers menu access to other clock and
alarm commands, plus commands for time arithme-
tic.”* See the Command Index (pp. 41-77) for details:
(94)
DATE i ln Ayl ALEM
[ HM 5=
S T I N
(95)
[(HCK|ACKR [STOAL[RCLAL{DELAL[FINDA]
I I I N .
Note: Alarm behavior is affected by Flags -43, -44,
and -57. See pages 78-80 for more details.
*Don’t set an interval too brief to acknowledge the alarm before it re-
peats. (If this happens, use the (ON}{4) system interrupt—see p. 39.)
“*Note, too, that the various “HMS” commands are useful for angular
degree measure, as well as chronological time measure.
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