1. Introduktion
This manual provides detailed instructions for the proper use and maintenance of your Casio HS-80TW-1DF Stopwatch. Please read this manual thoroughly to ensure optimal performance and longevity of your device. The Casio HS-80TW-1DF is a versatile stopwatch designed for various timing needs, featuring advanced functions such as lap memory, a football stopwatch mode, and a full auto calendar.

Billede 1.1: Forside view of the Casio HS-80TW-1DF Stopwatch, showing the display and control buttons, attached to a black lanyard.
2. Nøglefunktioner
- Stopur funktion: Measures elapsed time up to 10 hours with 1/1000-second accuracy.
- Omgangshukommelse: Stores up to 100 lap/split time records in two sets.
- Football Stopwatch: Dedicated 100-minute timer for tracking game time and injury time.
- Nedtællingstimer: 60-minute timer with auto-repeat function.
- Tællerfunktion: Counts from 0 to 99999, with standard, stopwatch, and dual counter modes.
- Daglige alarmer: Twelve independent beeper alarms.
- Tidtagning: Displays hour, minute, second, AM/PM, year, month, date, and day.
- Fuldautomatisk kalender: Automatically adjusts for different month lengths and leap years until 2099.
- Vandtæthed: 50 meters (5 BAR) suitable for swimming and athletic sports, but not snorkeling or scuba diving.
- Lang batterilevetid: Approximately 5 years on a CR2032 battery.
- Operation Tone: Option to turn button operation tones on or off.
3. Indledende opsætning
3.1 Batteriinstallation
The Casio HS-80TW-1DF stopwatch comes with a pre-installed CR2032 lithium-ion battery. If the display is dim or blank, the battery may need replacement. Refer to the "Maintenance" section for battery replacement instructions.
3.2 Indstilling af tid og dato
- Tryk på MODE knappen gentagne gange, indtil tidsvisningstilstanden vises.
- Tryk og hold på TILPASSE button (usually located on the side or back) until the seconds begin to flash, indicating the setting mode.
- Brug START/STOP button to increment the flashing value and the OMGANG/MELLEMRÅDE button to move between settings (seconds, hour, minute, year, month, day, 12/24-hour format).
- Når alle indstillinger er korrekte, skal du trykke på TILPASSE knappen igen for at forlade indstillingstilstanden.

Billede 3.1: Bagside view of the Casio HS-80TW-1DF Stopwatch, showing the battery compartment cover and screws.
4. Betjeningsvejledning
Navigate between different modes using the MODE knap.
4.1 Stopurstilstand
This mode measures elapsed time, lap times, and split times with 1/1000-second precision up to 10 hours.
- Gå ind i stopurstilstand ved hjælp af MODE button. The display will show "0'00"000".
- Trykke START/STOP for at begynde timingen.
- Trykke OMGANG/MELLEMRÅDE to record a lap time or split time. The display will momentarily show the recorded time.
- Trykke START/STOP igen for at sætte tidtagningen på pause.
- Trykke START/STOP for at genoptage timing, eller tryk på NULSTIL (often the same as LAP/SPLIT when stopped) to clear the stopwatch.
The stopwatch can store up to 100 lap/split records in two sets. To recall these records, use the MINDE OM button (if available, or a combination of other buttons as per specific model instructions).

Billede 4.1: Side view of the Casio HS-80TW-1DF Stopwatch, highlighting the buttons and their labels.
4.2 Football Stopwatch Mode
This mode is designed for referees to track game time and injury time, with a maximum capacity of 100 minutes.
- Enter Football Stopwatch Mode using the MODE knap.
- Trykke START/STOP to begin the game timer.
- If there is a stoppage in play, press OMGANG/MELLEMRÅDE to pause the main game timer and start the injury time counter.
- Trykke OMGANG/MELLEMRÅDE again to stop the injury time counter and resume the main game timer.
- Trykke START/STOP to end the game timer.
4.3 Nedtællingstimertilstand
The timer can be set for up to 60 minutes and features an auto-repeat function.
- Enter Countdown Timer Mode using the MODE knap.
- Tryk og hold TILPASSE for at gå ind i indstillingstilstand.
- Bruge START/STOP to set the desired countdown time (minutes).
- Trykke TILPASSE for at bekræfte og afslutte indstillingstilstand.
- Trykke START/STOP for at starte nedtællingen.
- When the countdown reaches zero, an alarm will sound. If auto-repeat is enabled, the timer will restart automatically.
4.4 Counter Mode
This mode allows counting from 0 to 99999. It supports standard, stopwatch, and dual counter functions.
- Enter Counter Mode using the MODE knap.
- Trykke START/STOP to increment the counter.
- Trykke OMGANG/MELLEMRÅDE for at nulstille tælleren.
- Specific sub-modes (standard, stopwatch, dual) can be selected by pressing TILPASSE in Counter Mode, then using START/STOP for at gennemgå mulighederne.
4.5 Alarmtilstand
The stopwatch features 12 independent daily alarms.
- Gå ind i alarmtilstand ved hjælp af MODE knap.
- Bruge OMGANG/MELLEMRÅDE to cycle through the 12 alarms.
- Tryk og hold TILPASSE for at gå ind i indstillingstilstand for den valgte alarm.
- Bruge START/STOP to set the hour and minute, and OMGANG/MELLEMRÅDE for at skifte mellem time-/minutindstillinger.
- Trykke TILPASSE for at bekræfte og afslutte indstillingstilstand.
- To turn an alarm on or off, select the alarm and press START/STOP (or a dedicated alarm on/off button if present).
5. Vedligeholdelse og pleje
5.1 Vandtæthed
The Casio HS-80TW-1DF is water resistant up to 50 meters (5 BAR). This means it is suitable for use around sinks, during swimming, and athletic sports in shallow waters. It is ikke suitable for snorkeling or scuba diving. Avoid operating buttons while the stopwatch is submerged in water to prevent water ingress.
5.2 Udskiftning af batteri
The stopwatch uses one CR2032 lithium-ion battery, providing approximately 5 years of operation. When the display becomes dim or functions are erratic, it is time to replace the battery. Battery replacement should ideally be performed by a qualified technician to ensure proper sealing and water resistance. If replacing yourself:
- Carefully remove the screws on the back cover of the stopwatch.
- Gently lift the back cover. Note the position of the gasket.
- Fjern det gamle CR2032-batteri, og isæt et nyt. Sørg for, at polerne vender korrekt (+ siden opad).
- Replace the gasket correctly and secure the back cover with the screws. Ensure the screws are tightened evenly to maintain water resistance.
After battery replacement, you may need to perform an AC (All Clear) reset by briefly touching the AC contact point on the module to the battery's negative terminal with a metal tweezer. Refer to the module diagram if available. Then, reset the time and date as described in Section 3.2.
5.3 Generel pleje
- Clean the stopwatch with a soft, dry cloth. For stubborn dirt, use a slightly damp en klud og en mild sæbe, og tør derefter af.
- Avoid exposing the stopwatch to extreme temperatures, direct sunlight for prolonged periods, or strong magnetic fields.
- Do not use chemical cleaners or solvents, as they may damage the casing eller display.
6. Fejlfinding
- Blank eller svag skærm:
This usually indicates a low battery. Replace the CR2032 battery as described in Section 5.2.
- Forkert tidspunkt/dato:
The time and date may need to be reset after a battery change or if the stopwatch has been exposed to strong impacts. Refer to Section 3.2 for setting instructions.
- Knapper reagerer ikke:
Ensure the stopwatch is not in a locked mode (if applicable, though not specified for this model). If the issue persists, a full reset (AC reset after battery change) might be necessary. If buttons are stuck, gently clean around them. Avoid forcing buttons.
- Vand indeni display:
If moisture appears inside the display, immediately stop using the stopwatch and seek professional service. This indicates a breach in the water resistance seal.
7. Specifikationer
| Modelnummer | HS-80TW-1DF |
| Mærke | Casio |
| Stopurets nøjagtighed | 1/1000 sekund |
| Stopwatch Capacity | 10 timer |
| Omgangshukommelse | 100 records x 2 sets |
| Nedtællingstimer | 60 minutes (with auto-repeat) |
| Alarmer | 12 daglige alarmer |
| Vandmodstand | 50 meter (5 BAR) |
| Batteritype | CR2032 litium-ion |
| Batterilevetid | Cirka 5 år |
| Dimensioner (H x B x D) | 83 x 64 x 24 mm (approximate, from description) |
| Vægt | 82 g (approximate, from description) |
| Etui materiale | Resin / Plastic |
| Oprindelsesland | Japan |
8. Garanti og support
For warranty information and customer support, please refer to the official Casio website or contact your local Casio distributor. Keep your proof of purchase for any warranty claims. Casio provides support for its products, and details can typically be found on their regional webwebsteder.
Extended warranty options may be available from third-party providers. Please check with your retailer for details on such services.





