HP 50g Graphing Calculator - Manual (Page 38)

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Let’s change the minute field to 25, by pressing: 25 !!@@OK#@ . The seconds
field is now highlighted. Suppose that you want to change the seconds field to
45, use: 45
!!@@OK#@
The time format field is now highlighted. To change this field from its current
setting you can either press the W key (the second key from the left in the fifth
row of keys from the bottom of the keyboard), or press the
@CHOOS soft menu key
( B).
Θ If using the W key, the setting in the time format field will change to either
of the following options:
o
AM : indicates that displayed time is AM time
o
PM : indicates that displayed time is PM time
o
24-hr : indicates that that the time displayed uses a 24 hour
format where18:00, for example, represents 6pm
The last selected option will become the set option for the time format by
using this procedure.
Θ If using the @CHOOS soft menu key, the following options are available.
Use the up and down arrow keys,— ˜, to select among these three
options (AM, PM, 24-hour time). Press the
!!@@OK#@ soft menu key to make the
selection.