Indledning
This manual provides comprehensive instructions for the operation and maintenance of your Ultrak 490L Stopwatch. Designed for precision timing, this device features an LED backlight, 100 dual split recallable memory, and a large 3-row display, making it suitable for various timing needs. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your stopwatch.
Nøglefunktioner
- LED Backlight for visibility in low-light conditions.
- 100 Dual Split Recallable Memory for tracking multiple splits and laps.
- Large 3-Row Display for clear and simultaneous viewing of split, lap, and total times.
- Measures up to 10 hours, accommodating long events.
- Stroke/Frequency Mode for specialized timing applications.
- Time and Calendar Display for everyday utility.
- Water Resistant construction for durability in various environments.
Opsætning
The Ultrak 490L Stopwatch comes ready for use with a pre-installed lithium battery. No initial setup is typically required beyond familiarizing yourself with the buttons and modes.
Indledende inspektion
Upon receiving your stopwatch, inspect it for any visible damage. Ensure all buttons are responsive and the display is clear. If any issues are found, refer to the Troubleshooting section or contact customer support.

Figur 1: Front view of the Ultrak 490L Stopwatch. This image displays the stopwatch's main screen with its three rows, indicating split, lap, and total time, all set to zero. The buttons for LAP/SPLIT/RESET, RECALL, START/STOP, and MODE/LIGHT are visible around the display. The "ULTRAK 490L" branding and "WATER RESISTANT" text are also clearly shown at the bottom.
Betjeningsvejledning
1. Basic Stopwatch Function (Start, Stop, Reset)
- Starttidspunkt: Tryk på START/STOP button (top right) to begin timing.
- Stop Timing: Tryk på START/STOP knappen igen for at sætte timeren på pause.
- Resume Timing: Tryk på START/STOP button to continue from where it was paused.
- Nulstil timer: While the timer is stopped, press the LAP/SPLIT/RESET button (top left) to reset the display to 0:00'00''00.
2. Lap/Split Timing
The stopwatch can record up to 100 dual split times, displaying both lap and split times simultaneously.
- Starte: Trykke START/STOP at begynde.
- Record Split/Lap: Trykke LAP/SPLIT/RESET to record a split time. The display will momentarily show the split time, while the main timer continues running in the background. The bottom row will show the current lap time.
- Fortsætte: The stopwatch will automatically return to displaying the running total time after a few seconds, or you can press LAP/SPLIT/RESET again to immediately update the display to the next split.
- Stop: Trykke START/STOP to end the timing session.

Figur 2: Nærbillede view of the Ultrak 490L Stopwatch, highlighting the buttons and the multi-row display. This image helps identify the 'LAP/SPLIT/RESET' button on the top left, 'RECALL' on the top center, 'START/STOP' on the top right, and 'MODE/LIGHT' on the bottom right. The display shows numerical values, indicating it is in an active timing or memory recall state.
3. Hukommelsesgenkaldelse
The stopwatch can store up to 100 split/lap times. These can be recalled even during an ongoing timing session.
- Enter Recall Mode: Tryk på MINDE OM button (top center).
- Navigate Memory: Brug LAP/SPLIT/RESET button to scroll forward through recorded splits/laps.
- Exit Recall Mode: Tryk på MINDE OM button again to return to the current timing display or time mode.
4. Time and Calendar Mode
Til view the current time and date:
- Skift tilstand: Tryk på TILSTAND/LYS button (bottom right) to cycle through different modes until the time and calendar are displayed.
- Indstilling af tid/dato: I tidstilstand skal du trykke på og holde TILSTAND/LYS button until the digits flash. Use LAP/SPLIT/RESET to adjust values and START/STOP to move to the next setting. Press TILSTAND/LYS for at bekræfte og afslutte.
5. Stroke/Frequency Mode
This mode is used to measure strokes per minute or frequency.
- Enter Stroke Mode: Tryk på TILSTAND/LYS button until "STROKE" or "FREQ" appears on the display.
- Start måling: Trykke START/STOP.
- Count Strokes: Trykke START/STOP for each stroke or cycle. The stopwatch will calculate and display the average stroke/frequency.
- Stop Measurement: Trykke START/STOP to stop counting.
- Nulstil: Trykke LAP/SPLIT/RESET to clear the measurement.
6. LED-baggrundsbelysning
To activate the LED backlight for improved visibility:
- Tryk og hold på TILSTAND/LYS button for approximately 2 seconds. The backlight will illuminate for a short period.
Opretholdelse
- Rensning: Wipe the stopwatch with a soft, damp klæde. Brug ikke skrappe kemikalier eller slibende rengøringsmidler.
- Vandtæthed: The Ultrak 490L is water resistant. This means it can withstand splashes and brief immersion. However, it is not designed for prolonged underwater use or diving. Avoid pressing buttons while submerged to prevent water ingress.
- Udskiftning af batteri: The stopwatch uses a lithium battery. When the display becomes dim or unresponsive, the battery may need replacement. This should ideally be performed by a qualified technician to maintain water resistance.
- Opbevaring: Store the stopwatch in a cool, dry place away from direct sunlight and extreme temperatures.
Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Skærmen er svag eller tom. | Lavt batteri. | Udskift lithiumbatteriet. |
| Knapperne reagerer ikke. | Midlertidig softwarefejl eller lavt batteri. | Try resetting the stopwatch (if possible, by removing and reinserting the battery, or pressing a recessed reset button if available). If not, replace the battery. |
| Water ingress after exposure. | Buttons pressed while submerged or seal compromised. | Discontinue use. Allow to dry completely. If issues persist, contact customer support. Avoid pressing buttons underwater. |
| Forkert tidspunkt/dato vist. | Tid/dato ikke indstillet korrekt. | Refer to "Time and Calendar Mode" instructions to set the correct time and date. |
Specifikationer
- Model: 490L
- Mærke: Ultrak
- Dimensioner (LxBxH): 0.75 x 2.5 x 3.25 tommer
- Farve: Sort
- Materiale: Plast og gummi
- Hukommelse: 100 Dual Split Recallable Memory
- Vise: Large 3-Row Display with LED Backlight
- Timing kapacitet: Op til 10 timer
- Funktioner: Stopwatch, Lap/Split Timing, Memory Recall, Time/Calendar, Stroke/Frequency
- Vandtæthed: Ja
- Batteri: Lithium (type not specified, typically CR2032 or similar)
- Fabrikant: CEI-Ultrak
Garanti og support
For specific warranty information, please refer to the documentation included with your purchase or visit the official Ultrak website. If you encounter any issues not covered in this manual or require further assistance, please contact Ultrak customer support.
Fabrikant: CEI-Ultrak





