Operation Guide 3507

This guide provides information on operating the Casio 3507 watch. For operational procedures, visit the CASIO website: https://support.casio.com/global/en/wat/model/3507/

Warning! The longitude, lunilidal interval, Moon phase indicator, and tide graph data are for approximation only and not for navigation. CASIO COMPUTER CO., LTD. is not responsible for any damage or loss arising from the use or malfunction of this watch.

About This Manual

Button operations are indicated by letters. Product illustrations are for reference only. Each section provides information for each mode, with further details in the "Reference" section.

Watch Features

• Moon/Tide Data: View Moon age, Moon phase, and tidal movements for a specific date and time at your Home Site.
• Stopwatch
• Timer
• Alarm
• Dual Time

You can find information about operational procedures at the CASIO website: https://support.casio.com/global/en/wat/model/3507/

The watch display includes:

• Day of week
• Month - Day
• PM indicator
• Hour : Minutes
• Seconds
• Tide graph

Timekeeping

To set the time and date:

1. In the Timekeeping Mode, hold down button A until the seconds flash.
2. Press button C to cycle through settings: Seconds, DST, Hour, Minutes, Year, Month, Day.
3. Use buttons B (-) and D (+) to change flashing values.
4. Press button A twice to exit.

Daylight Saving Time (DST) Setting

Daylight Saving Time advances the time by one hour. Not all areas observe DST.

To toggle the Timekeeping Mode time between DST and Standard Time:

1. In the Timekeeping Mode, hold down button A until seconds flash.
2. Press button C once to display the DST setting screen.
3. Press button D to toggle between DST (On) and Standard Time (Off).
4. Press button A twice to exit.

The DST indicator appears on relevant mode screens when DST is active.

To configure Home Site data:

Correct Home Site data (UTC differential, longitude, lunitidal interval) is crucial for accurate Moon/Tide Data. The UTC differential is the time difference from Greenwich Mean Time. Lunitidal interval is the time between the Moon's transit and high tide.

The setting sequence involves:

1. Hold down button A in Timekeeping Mode until seconds flash.
2. Press button A again to display the UTC differential setting.
3. Press button C to move through settings: UTC Differential, Longitude Value, East/West Longitude, Lunitidal Interval Hours, Lunitidal Interval Minutes.
4. Use buttons B and D to adjust values.
5. Press button A twice to exit.

To toggle between 12-hour and 24-hour timekeeping:

In the Timekeeping Mode, press button D to switch between 12-hour (with A/P indicators) and 24-hour formats.

Moon/Tide Data

This mode displays Moon age, Moon phase for a specific date, and tidal movements for a specific date and time at your Home Site.

To view the current Moon/Tide Data Mode data:

In the Moon/Tide Data Mode, press button B to toggle between the tide data screen and the Moon data screen.

The tide graph shows tide levels for the displayed time. The Moon data screen shows Moon age and phase for the current date.

To specify a date:

1. In the Moon/Tide Data Mode, hold down button B until the year flashes.
2. Press button C to cycle through Year, Month, and Day settings.
3. Use buttons D (-) and A (+) to change values.
4. Press button B to exit.
5. Press button B again to display either the tide or Moon data screen.

The date can be set between January 1, 2000, and December 31, 2099.

Stopwatch

The stopwatch measures elapsed time, split time, and two finishes.

• Elapsed Time: Start, Stop, Resume, Stop, Reset (using buttons D and A).
• Split Time: Start, Split (SPL displayed), Split release, Stop, Reset (using buttons D and A).
• Two Finishes: Start, Split (First runner), Stop (Second runner), Split release (Display time of), Reset (using buttons D and A).

Timer

The countdown timer can be set from 1 minute to 24 hours. An alarm sounds when the countdown reaches zero. Auto-repeat restarts the countdown automatically.

To set up the timer:

1. In Timer Mode, hold down button B until the hour setting flashes.
2. Press button C to cycle through Hours, Minutes, and Auto-repeat settings.
3. Use buttons D (-) and A (+) to change values. Press button C to toggle Auto-repeat (On/Off).
4. Press button B twice to exit.

The auto-repeat indicator (Ω) is displayed when active. Frequent use of auto-repeat and alarm can drain the battery.

To use the timer:

Press button B in Timer Mode to start the countdown. Press B to pause and resume. To stop completely, pause first, then press B again.

Alarm

Set up to three multi-function alarms with hour, minutes, month, and day. An Hourly Time Signal can also be activated.

To set an alarm time:

1. In Alarm Mode, use button D to scroll through alarm screens (1, 2, 3, :00 for Hourly Time Signal).
2. Hold down button B until the hour setting flashes. This automatically turns the alarm on.
3. Press button C to cycle through Hour, Minutes, Month, and Day settings.
4. Use buttons D (-) and A (+) to change values.
5. Press button B twice to exit.

Alarm 1 has a snooze feature, repeating every five minutes.

To turn Alarms 2 and 3, and the Hourly Time Signal on and off:

1. In Alarm Mode, use button D to select the desired alarm or Hourly Time Signal.
2. Press button A to toggle it on or off.

The alarm on indicator (ALM) and hourly time signal on indicator (SIG) are displayed in all modes when active.

Dual Time

The Dual Time Mode allows you to track time in a different time zone, with options for Standard Time or Daylight Saving Time.

To set the Dual Time:

1. Enter Dual Time Mode by pressing button D.
2. Hold down button A until the DST setting flashes.
3. Press button C to cycle through settings: DST, Hour, Minutes.
4. Use buttons B (-) and D (+) to change values.
5. Press button A to exit.

The DST indicator appears on the Dual Time Mode screen when DST is active for that time.

Illumination

The watch has an LED light for reading in the dark.

To illuminate the display:

In any mode, press button C to turn on illumination for approximately 1.5 or 3 seconds.

To specify the illumination duration:

1. In Timekeeping Mode, hold down button A until seconds flash.
2. Press button C to toggle illumination duration between 1.5 seconds (-) and 3 seconds (↑).
3. Press button A twice to exit.

Reference

Moon Phase Indicator

The Moon phase indicator shows the Moon's phase as viewed from the Northern Hemisphere looking south. The image may differ from the actual Moon in your location. The left-right orientation is reversed in the Southern Hemisphere.

The Moon phase indicator displays:

Tide Graph

The Tide Graph has six segments indicating tide levels. The current tide level is shown by the highlighted segment.

Tidal movements are caused by gravitational forces. Tides rise and fall approximately every six hours. The tide graph uses the Moon's transit and lunitidal interval. The lunitidal interval must be set correctly for accurate readings.

The graph shows:

• Low Tide
• (Rising Tide)
• High Tide
• (Falling Tide)
• Low Tide

Button Operation Tone

The button operation tone sounds when a button is pressed. It can be turned on or off.

To turn the button operation tone on and off:

In any mode (except during setting), hold down button C to toggle the tone on (♪ not displayed) or off (♪ displayed). This action may also change the current mode. The ♪ indicator is displayed when the tone is off.

Specifications

• Accuracy at normal temperature: ±30 seconds per month
• Timekeeping: Hour, minutes, seconds, a.m./p.m., month, day, day of week.
• Time format: 12-hour and 24-hour.
• Calendar system: Full Auto-calendar (2000-2099).
• Other: DST/Standard Time, Home Site data (UTC differential, longitude, lunitidal interval).
• Moon/Tide Data: Tide level for specified date/time; Moon phase indicator and Moon age for specified date.
• Stopwatch:
• Measuring unit: 1/100 second.
• Measuring capacity: 23:59:59.99.
• Measuring modes: Elapsed time, split time, two finishes.
• Timer:
• Measuring unit: 1 second.
• Input range: 1 minute to 24 hours.
• Time up alert duration: 10 seconds.
• Other: Auto-repeat timing.
• Alarm: 3 multi-function alarms (1 with snooze); Hourly Time Signal.
• Dual Time: Hour, minutes, seconds, a.m./p.m.
• Illumination: LED; selectable duration (approx. 1.5 or 3 seconds).
• Battery: One lithium battery (Type: CR2025).
• Battery life: Approx. 10 years with CR2025 (assuming 10 sec./day alarm and 1.5 sec./day illumination). Frequent illumination use shortens battery life.

Specifications are subject to change without notice.

Site/Lunitidal Interval Data List

The contents of this table are current as of January 2021. Global time rules (UTC offset, GMT differential) and summer time are determined by individual countries.