Casio Watch 438 User Manual download pdf

Operation Guide 437/438

MA0904-EA

(Reversion to regular time) The watch reverts to the regular timekeeping display after

operating in any mode.

(Auto-retrieve function) The calculator and alarm displays will automatically return to

the regular timekeeping display in 5 or 6 minutes.

Calculator Operation

Module No. 437

Module No. 438

Appears when a number is set as

a constant.

A function command sign

Clears entry for correction.

Releases overflow or error

check. Overflow is indicated

by an “E” sign and stops the

calculation. Overflow occurs

when the integer part of an

answer whether intermediate

or final, exceeds 8 digits (7

digits for negatives).

Perform the four basic

calculations. An incorrect function

command is corrected by

pressing the correct button.

8-digit entry (7-digit for negatives)

can be made.

Enters numerals. For decimal

places, use the key in its

logical sequence.

Obtains answer.

EXAMPLE

OPERATION

READ-OUT

Basic

calculation:

(12 – 0.5) × 3 ÷ 7

= 4.9285714 ...

Constant

calculation:

(4 is constant)

Power

calculation:

12 5

3 7

4 3

–

4 8

–

= –

EXAMPLE

OPERATION

READ-OUT

4 3

0.75

4 = 12

(4 is constant)

4 3

To save battery power, press the B button in the calculator mode to silence the tone.

To retrieve sound, press the B button again.

Setting Daily Alarm Time

Every time the button is pressed in the alarm time mode, the alarm-ON-mark

(

) appears or disappears. When the alarm-ON-mark is lit, the buzzer sounds for 20

seconds at the preset time every day until cleared. To stop the buzzer while sounding,

press any button.

(Setting the time signal) Every time the

button is pressed in the alarm time mode,

the time-signal-ON-mark (

) appears or disappears. When the time-signal-ON-mark

is lit, the watch sounds every hour on the hour.

(Sound demonstration) While both

and buttons are pressed simultaneously,

the buzzer sounds.

[Presetting alarm time]

1) Press B to set new alarm time.

2) Press

to set PM or AM.*

3) A numeral can be entered in the flashing position by pressing the required numeral

key.

The flashing digit can be shifted in the following order:

HOUR10-HOUR 10-MINUTE MINUTE

4) Press B to complete setting.

* When the watch is in the 24-hour system, the alarm time is displayed in that system.

Setting Dual Time

1) Press B to set new time in dual time mode.

2) Press

to set PM or AM.*

3) A numeral can be entered in the flashing position by pressing the required numeral

key. The flashing digit can be shifted in the following order:

HOUR10-HOUR 10-MINUTE MINUTE

4) Press B to complete setting.

* When the watch is in the 24-hour system, the dual time is displayed in that system.

Reading The Display

Module No. 438

Module No. 437

Time

Calculator

Mode

Daily Alarm Mode Dual Time Mode Stopwatch

Mode

A.M. Minute

Mode indicator

Hour

Time-signal-ON-mark

Minute

Second

Hour

Mode indicator

Alarm-ON-mark P.M.

Second

1/100 second

Minute

Mode indicator

Month

Day

P.M.

Year

Date Hour

Second

Day

Minute

Release

Release .

Press

Press .

Calendar

Regular timekeeping

Press

SU: Sunday MO: Monday

TU: Tuesday WE: Wednesday

TH: Thursday FR: Friday

SA: Saturday

Stopwatch Operation

Module No.437

Module No.438

A signal confirms start/stop operation. The tone sounds at

10-minute intervals.

(Working range) The stopwatch display is limited to 23

hours 59 minutes 59.99 seconds.

Thereafter it can be reset and started again. The hour

digits can be shown by pressing the

button.

Second

1/100 second

Minute Hour

Lap indicator

Release .

Press .

(a) Net time measurement

Start Stop Re-start Stop Reset

(b) Lap time measurement

(Time loss)

Start Lap Lap release Stop Reset

Start

The first runner

finishes.

Lap

The second runner

finishes.

Record the time of

the first runner.

Stop

Record the time of

the second runner.

Lap release Reset

Setting Time And Calendar

1) To set time and calendar, press B in the regular timekeeping mode.

2) Press the

key on a time signal to correct seconds.

3) The flashing position can be shifted by pressing C in the following order:

10-HOURAM/PMSECOND HOUR 10-MINUTE

MONTH YEARDATE MINUTE

AM or PM can be entered by pressing the button.*

4) A numeral can be entered in the flashing position by pressing the required numeral

key.

5) Press B to complete setting.

While setting time and calendar, with every push of , the display is switched

between 12-hour and 24-hour formats.

1 2

Operation Guide 437/438 1

Summary of Contents

Page 1 - Operation Guide 437/438

1Operation Guide 437/438MA0904-EA(Reversion to regular time) The watch reverts to the regular timekeeping display afteroperating in any mode.(Auto-ret

Page 2

2Operation Guide 437/438SpecificationsAccuracy at normal temperature: ±15 seconds a monthDisplay capacity:• Regular timekeepingHour, minute, second, a

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Casio Watch 438 User Manual

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