Casio QW-3558: A versatile timepiece featuring a built-in calculator, stopwatch, daily alarms, dual time display, and hourly time signal. With its four basic calculation functions, you can perform quick calculations on the go. Set daily alarms to remind you of important events, and utilize the stopwatch to time your activities accurately. Keep track of a second timezone with the dual time mode, and stay punctual with the hourly time signal.
Casio QW-3558: A versatile timepiece featuring a built-in calculator, stopwatch, daily alarms, dual time display, and hourly time signal. With its four basic calculation functions, you can perform quick calculations on the go. Set daily alarms to remind you of important events, and utilize the stopwatch to time your activities accurately. Keep track of a second timezone with the dual time mode, and stay punctual with the hourly time signal.
Operation Guide 3558
EN-9
To save battery power, press the B button in the calculator mode to silence the
tone.
To retrieve sound, press the B button again.
EN-8
EXAMPLE OPERATION
READ-OUT
Basic
calculation:
(12 – 0.5) × 3 ÷ 7
= 4.9285714 ...
12 5
3 7
Constant
calculation:
3 + 4 = 7
(4 is constant) 4 3
8 + 4 = 12 8
3 – 4 = –1 4 3
8 – 4 = 4 8
EXAMPLE OPERATION
READ-OUT
3 × 4 = 12
(4 is constant) 4 3
8 × 4 = 32 8
3 ÷ 4 = 0.75 4 3
8 ÷ 4 = 2 8
Power
calculation:
323
33
EN-7
Calculator Operation
Obtains answer.
Appears when a number
is set as a constant.
A function command sign. 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.
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 (7digits for
negatives).
After “E” appears: To continue with
the current calculation, press A
once. To start a new calculation,
press A twice.
EN-6
(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.
You can also find information about operational
procedures at the CASIO website.
https://support.casio.com/global/en/wat/model/3558/
EN-5
A.M.
Calculator
Mode
Alarm Mode Dual Time Mode Stopwatch
Mode
Hour
Minute
P.M.
Hour
Minute
Mode indicator
Second
Mode indicator
Minute
Second
1/100 second
A A A
A
Mode indicator
EN-4
Reading The Display
Regular timekeeping
Day
Calendar Time
Month
Year
Day of week
Hour
P.M. Day of week
Second
Minute
SU: Sunday MO: Monday TU: Tuesday WE: Wednesday
TH: Thursday FR: Friday SA: Saturday
A
EN-3
Watch Features
You can also find information
about operational procedures
at the CASIO website.
https://support.casio.com/
global/en/wat/model/3558/
◆ Calculator
◆ Alarm
◆ Dual Time
◆ Stopwatch
EN-2
Contents
Watch Features ..................................................................................................... EN-3
Reading The Display ............................................................................................ EN-4
Calculator Operation ............................................................................................ EN-7
Setting Daily Alarm Time ................................................................................... EN-10
Setting Dual Time ............................................................................................... EN-12
Stopwatch Operation ......................................................................................... EN-13
Setting Time And Calendar ................................................................................ EN-15
Specifications ..................................................................................................... EN-17
EN-1
ENGLISH
You can also find information about
operational procedures at the CASIO website.
https://support.casio.com/global/en/wat/model/3558/
MA2302-EA © 2023 CASIO COMPUTER CO., LTD.
Operation Guide 3558
EN-18
x Stopwatch mode
Measuring unit: 1/100 second
Measuring capacity: 23 hours, 59 minutes, 59.99 seconds
Measuring modes: Elapsed time, lap time, two finishes
xDual time mode
xAlarm mode
xHourly time signal
Battery:
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)
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.
Specifications are subject to change without notice.
EN-17
Specifications
Accuracy at normal temperature:
±
30 seconds per month average
Display capacity:
x Regular timekeeping
Hour, minute, second, am/pm, year, month, day and day of the week on its
double display
Time format: 12-hour and 24-hour
Calendar system: Auto-calendar pre-programmed from the year 2000 to 2099
x 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
EN-16
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.
EN-15
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. Press A to move the flashing in the sequence shown below to select the other
settings.
SECOND HOUR
(ones)
HOUR
(tens)
AM/PM
MONTH
MINUTE
(tens)
YEAR
AAA
MINUTE
(ones)
DAY
A
A
A
AAA
xAM or PM can be entered by pressing the button.*
EN-14
(a) Elapsed time
(Time loss)
Start Stop Re-start Stop Reset
(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
Record the time of
the second runner.
Reset
EN-13
Stopwatch Operation
A signal confirms start/stop operation. The tone sounds at
10-minute intervals.
(Working range) The stopwatch display is limited to
23hours 59 minutes 59.99 seconds.
Thereafter it can be reset and started again. The hour
digits can be shown by pressing the button.
Hour
Lap indicator
Minute
Second
1/100 second
EN-12
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:
HOUR
(tens)
MINUTE
(ones)
MINUTE
(tens)
HOUR
(ones)
4. Press B to complete setting.
* When the watch is in the 24-hour system, the dual time is displayed in that system.
EN-11
[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:
HOUR
(tens)
MINUTE
(ones)
MINUTE
(tens)
HOUR
(ones)
4. Press B to complete setting.
* When the watch is in the 24-hour system, the alarm time is displayed in that system.
EN-10
Setting Daily Alarm Time
Every time the button is pressed in the
alarm 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 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.
Alarm-ON-mark
A.M.
Hour Minute
Time-signal-ON-mark
-
1
-
2
Casio QW-3558: A versatile timepiece featuring a built-in calculator, stopwatch, daily alarms, dual time display, and hourly time signal. With its four basic calculation functions, you can perform quick calculations on the go. Set daily alarms to remind you of important events, and utilize the stopwatch to time your activities accurately. Keep track of a second timezone with the dual time mode, and stay punctual with the hourly time signal.
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