HP -18C Owner's Manual page 122

Table 8-2. The Alarm-Setting Menu Keys.
Menu Key Description
...
Enters the number on the calculator line as the alarm date.
lID
Enters the number on the calculator line as the alarm time .
Di1iI
In 12-hour time mode, sets AM or PM .
BIll Used to type an alarm message.
~
..
Displays the RPT (repeat) menu, which is used to set the re-
peat interval.
...
Displays the keystrokes for setting the alarm time and date.
3. Press
. 1
CLEAR ALL
1
to clear the previous alarm settings.
4. If you are uncertain how to key in the time or date, press
. . . .
5. Key in the date of the alarm as a number, using the current date
format. For example, October 4, 1988 would be 10.041988
(month/day /year format) or 4.101988 (day.month.year format).
Press . . . . If you omit the year, the calculator assumes the
current year.
6. Note the time format in use-AM or PM after the time indicates
12-hour format . Key in the time of the alarm as a number in the
form HH.MMSS. For example, 2:25 p.m. would be 2.25 (12-hour
format) or 14.25 (24-hour format).
7. For 12-hour format only: If necessary, press
Di1iI
to switch be-
tween AM and PM.
8. If you want to store a message, press
BIll.
Type the message
and press
1
INPUT
I.
Messages are limited to a maximum of 22
characters.
120 8: Time, Alarms, and Date Arithmetic