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Explains the display elements for regular timekeeping, including day, date, time, and AM/PM indicators.
Illustrates how Calculator, Alarm, Dual Time, and Stopwatch modes are indicated on the watch display.
Details how to perform basic arithmetic operations, including addition, subtraction, multiplication, and division.
Explains numeral entry, decimal point usage, and correction methods for calculator operations.
Describes overflow indications ('E' sign) and procedures for continuing or restarting calculations.
Provides instructions on how to silence the calculator's tone to conserve battery power.
Details how to enable/disable the daily alarm and hourly time signal, and how to set the alarm time.
Guides users on setting a second time zone (Dual Time) on the watch.
Explains how to start, stop, reset, and read lap times in the stopwatch mode.
Details recording elapsed time, lap times, and times for two finishers.
Instructions for setting the current time, date, and calendar using the watch buttons.
Lists accuracy, display capacity, calculator abilities, stopwatch measuring units, and battery life.
The Casio 3558 is a multi-function digital watch designed for everyday use, offering a range of features including timekeeping, a calculator, an alarm, dual time, and a stopwatch. Its intuitive interface allows for easy navigation and operation across various modes.
The watch provides regular timekeeping with a comprehensive display that includes the hour, minute, second, AM/PM indicator, year, month, day, and day of the week. The time format can be toggled between 12-hour and 24-hour systems, catering to user preference. An auto-calendar system is pre-programmed from the year 2000 to 2099, ensuring accurate date display without manual adjustments for leap years or varying month lengths. The display also features a day of the week indicator, which is useful for quick reference. The watch automatically reverts to the regular timekeeping display after a period of inactivity in other modes, typically five or six minutes in the calculator or alarm display, to conserve battery and maintain primary function visibility.
A key feature of the Casio 3558 is its integrated calculator, capable of performing four basic arithmetic calculations: addition, subtraction, multiplication, and division. It supports chain and mixed operations, allowing for complex calculations. The calculator also handles constant calculations for addition, subtraction, multiplication, and division, as well as power calculations. Users can input up to 8 digits (7 digits for negative numbers). For decimal places, a dedicated key is used in its logical sequence. An "E" sign indicates an overflow, which occurs when the integer part of an answer exceeds 8 digits (or 7 for negatives), locking the calculator mode. To continue with a current calculation after an overflow, the user presses the clear button once; to start a new calculation, it's pressed twice. The calculator mode also features a tone that confirms button presses, which can be silenced to save battery power by pressing the mode button and retrieved by pressing it again.
The watch includes a daily alarm function. When in alarm mode, the alarm-ON-mark appears or disappears with each press of the mode button. When the alarm-ON-mark is lit, the alarm sounds for 20 seconds at the preset time every day until it is manually cleared. Any button press will stop the buzzer while it is sounding. Additionally, the watch offers a time signal feature, which, when activated (indicated by the time-signal-ON-mark), causes the watch to sound every hour on the hour. A sound demonstration can be activated by simultaneously pressing both the numeric and function command buttons, causing the buzzer to sound. Setting the alarm time involves navigating to the alarm mode, pressing the mode button to set the new time, and then using the numeral keys to input the desired hour and minute. The flashing digit can be shifted to set different parts of the time. The alarm time display will correspond to the 12-hour or 24-hour system currently in use for regular timekeeping.
The dual time mode allows users to track a second time zone. This is particularly useful for travelers or individuals who frequently communicate across different time zones. To set the dual time, the user enters the dual time mode, presses the mode button to set the new time, and then uses the numeral keys to input the desired hour and minute. Similar to the alarm setting, the flashing digit can be shifted to set different parts of the time. The dual time display also adheres to the 12-hour or 24-hour system selected for the main timekeeping.
The stopwatch mode offers precise time measurement with a measuring unit of 1/100 second. It has a measuring capacity of 23 hours, 59 minutes, 59.99 seconds. The stopwatch supports various measuring modes, including elapsed time, lap time, and two finishes. A signal confirms start/stop operations, and a tone sounds at 10-minute intervals. The display includes minutes, 1/100 seconds, and hours. A lap indicator is also present for lap time measurements. After reaching its maximum capacity, the stopwatch can be reset and started again.
The watch is powered by one lithium battery (Type: CR2016), which provides an approximate operation of 5 years. This estimate includes the alarm sounding for 20 seconds and calculator use for 1 hour per day. The manual emphasizes that the unit components are robust and not easily damaged by misoperation of buttons. If confusing information appears on the display, it suggests that the entry sequence was incorrect, advising the user to re-read the manual and try again. This highlights the watch's durability and user-friendly troubleshooting approach. The specifications are subject to change without notice, indicating potential for future improvements or variations in models.
General| Movement | Quartz |
|---|---|
| Display Type | Digital |
| Water Resistance | 50 meters |
| Case Material | Resin |
| Band Material | Resin |
| Model | 3558 |
| Brand | Casio |
| Category | Watch |
| Display | Digital |
| Alarm | Yes |
| Stopwatch | Yes |
| Features | Alarm, Stopwatch, Backlight |
| Battery Life | Approx. 7 years on CR2016 |
| Backlight | Yes |
