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Casio Digital Diary SF-3990 User Manual

Page 9

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E-7

Key Operation

Display

EDIT

20031117 AM/PM 0945

Each press of AM/PM toggles between
AM (A) and PM (P). AM is indicated on the
display by “A”, while PM is indicated by “P”.

ENTER

This resets the seconds to 00.

Be sure to input leading zeros when necessary.

Use the following to specify noon and midnight.

Noon

Midnight

12-hour format

12 PM

12 AM

24-hour format

12

00

To switch between Standard Time and Daylight Saving Time

Press DST while your Home Time or the World Time is displayed to toggle
between Standard Time and Daylight Saving Time.

You must make separate settings for Home Time and World Time.

HOME

N

O

M

7

A

0

1

4

-

0

1

5

1

1

1

3

0

0

2

-

-

To switch between 12-hour and 24-hour format

1. Display the Home Time or the World Time.
2. Press 12/24 to change between 12-hour and 24-hour timekeeping.

HOME

N

O

M

7

A

0

0

4

-

9

5

1

1

1

3

0

0

2

-

-

DST indicator

HKG

1

P

0

-

1

0

5

0

1

0

3

0

0

_

-

-

HKG

7

A

4

-

9

0

_

1

1

1

3

0

0

-

-

2