Casio CA53W-1 Operation Manual
MA1002-EA
Operation Guide 437/438/3208
Reading The Display
Month
Year
Release
.
Calendar
Day
Regular timekeeping
Date
Release .
Press
.
Module No. 438
Press .
Time
Hour
P.M.
Day
Second
Minute
Module No. 437/3208
SU: Sunday MO: Monday
TU: Tuesday WE: Wednesday
TH: Thursday FR: Friday
SA: Saturday
Press
.
Calculator Operation
Appears when a number is set as
a constant.
8-digit entry (7-digit for negatives)
can be made.
Enters numerals. For decimal
places, use the key in its
logical sequence.
Module No. 437/3208
Module No. 438
EXAMPLE
Basic
calculation:
(12 – 0.5) × 3 ÷ 7
= 4.9285714 ...
Constant
calculation:
3 + 4 = 7
(4 is constant)
8 + 4 = 12
3 – 4
8 – 4 = 4 8
To save battery power, press the B button in the calculator mode to silence the tone.
To retrieve sound, press the B button again.
OPERATION
12 5
3 7
4 3
8
= –
4 3
1
READ-OUT
A function command sign.
Perform the four basic
calculations. An incorrect function
command is corrected by
pressing the correct button.
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).
Obtains answer.
EXAMPLE
3 × 4 = 12
(4 is constant)
8 × 4 = 32
3 ÷ 4 = 0.75
8 ÷ 4 = 2
Power
calculation:
2
3
3
3
OPERATION
4 3
8
4 3
8
3
3
READ-OUT
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
the time-signal-ON-mark (
is lit, the watch sounds every hour on the hour.
(Sound demonstration) While both
the buzzer sounds.
[Presetting alarm time]
1) Press B to set new alarm time.
2) Press
3) A numeral can be entered in the flashing position by pressing the required numeral
to set PM or AM.*
key. The flashing digit can be shifted in the following order:
HOUR
(tens)
) appears or disappears. When the time-signal-ON-mark
HOUR
(ones)
button is pressed in the alarm time mode,
and buttons are pressed simultaneously,
MINUTE
(tens)
MINUTE
(ones)
Calculator
Mode
(Reversion to regular time) The watch reverts to the regular timekeeping display after
operating in any mode.
(Auto return feature) The watch will return to the regular timekeeping display
automatically if you do not perform any operation for five or six minutes in the
calculator or alarm display.
Daily Alarm Mode Dual Time Mode Stopwatch
Alarm-ON-mark P.M.
Time-signal-ON-mark
Hour
A.M. Minute
Mode indicator
Mode indicator
Hour
Minute
Second
Mode
Mode indicator
Minute
1/100 second
Second
Stopwatch Operation
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
Module No. 437/3208
digits can be shown by pressing the
Lap indicator
Minute Hour
Second
Press .
Release .
1/100 second
button.
Module No. 438
(a) Elapsed time
Start Stop Re-start Stop Reset
(Time loss)
(b) Lap time
Start Lap Lap release Stop Reset
(c) Two finishes
Start
Lap
The first runner
finishes.
Stop
The second runner
finishes.
Record the time of
the first runner.
Lap release Reset
Record the time of
the second runner.
Setting Time And Calendar
1) To set time and calendar, press B in the regular timekeeping mode.
2) Press the
3) Press C to move the flashing in the sequence shown below to select the other
settings.
• 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.
key on a time signal to correct seconds.
AM/PMSECOND
HOUR
(tens)
MONTH YEARDATE
HOUR
(ones)
MINUTE
(tens)
MINUTE
(ones)
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
3) A numeral can be entered in the flashing position by pressing the required numeral
4) Press B to complete setting.
* When the watch is in the 24-hour system, the dual time is displayed in that system.
to set PM or AM.*
key. The flashing digit can be shifted in the following order:
HOUR
(tens)
HOUR
(ones)
MINUTE
(tens)
MINUTE
(ones)
1
Operation Guide 437/438/3208
Specifications
Accuracy at normal temperature: ±15 seconds a month
Display capacity:
• Regular timekeeping
Hour, minute, second, am/pm, year, month, date and day on its double display
Time format: 12-hour and 24-hour
Calendar system:
• (Module No. 437/438) Auto-calendar pre-programmed to the year 2079
• (Module No. 3208) Auto-calendar pre-programmed from the year 2000
• Calculator mode
8 digits (7 digits for negatives)
Abilities: Four basic calculations, chain & mixed operations, constants for + / – /
× / ÷, power calculation
Decimal point: Full floating with underflow
Overflow check: lndicated by the “E” sign, locking the calculator mode
• Stopwatch mode
Measuring unit: 1/100 second
Measuring capacity: 23 hours, 59 minutes, 59.99 seconds
Measuring modes: Elapsed time, lap time, two finishes
• Dual time mode
• Daily alarm mode
• Hourly time signal
Battery:
• (Module No. 437/3208)
One lithium battery [Type: CR2016]
Approx. 5 years operation on type CR2016
(lncludes the alarm for 20 seconds and calculation for 1 hour per day)
• (Module No. 438)
One lithium battery [Type: CR1616]
Approx. 3 years operation on type CR1616
(lndudes the alarm for 20 seconds and calculation for 1 hour per day)
NOTE: THERE IS NO WAY unit components can be damaged or malfunction, due to
misoperation of buttons. If confusing information appears on the display it
means entry sequence was incorrect. Please read the manual and try again.
to 2099
2
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