소개
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.
주요 특징
- 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.
설정
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.
초기 검사
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.

그림 1: 앞쪽 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.
작동 지침
1. Basic Stopwatch Function (Start, Stop, Reset)
- 시작 타이밍: 를 누르세요 시작/중지 타이밍을 시작하려면 (오른쪽 상단) 버튼을 누르세요.
- 타이밍 정지: 를 누르세요 시작/중지 타이머를 일시 정지하려면 버튼을 다시 누르세요.
- Resume Timing: 를 누르세요 시작/중지 button to continue from where it was paused.
- 타이머 재설정: 타이머가 정지된 상태에서 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.
- 시작: 누르다 시작/중지 시작하다.
- Record Split/Lap: 누르다 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.
- 계속하다: 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.
- 중지: 누르다 시작/중지 to end the timing session.

그림 2: 클로즈업 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. 메모리 리콜
The stopwatch can store up to 100 split/lap times. These can be recalled even during an ongoing timing session.
- 리콜 모드로 진입하세요: 를 누르세요 상기하다 button (top center).
- Navigate Memory: 사용하세요 LAP/SPLIT/RESET button to scroll forward through recorded splits/laps.
- 리콜 모드 종료: 를 누르세요 상기하다 button again to return to the current timing display or time mode.
4. Time and Calendar Mode
에게 view the current time and date:
- 스위치 모드: 를 누르세요 모드/조명 button (bottom right) to cycle through different modes until the time and calendar are displayed.
- 시간/날짜 설정: 시간 모드에서 길게 누르세요 모드/조명 button until the digits flash. Use LAP/SPLIT/RESET 값을 조정하고 시작/중지 to move to the next setting. Press 모드/조명 확인하고 종료합니다.
5. Stroke/Frequency Mode
This mode is used to measure strokes per minute or frequency.
- Enter Stroke Mode: 를 누르세요 모드/조명 button until "STROKE" or "FREQ" appears on the display.
- 측정 시작: 누르다 시작/중지.
- Count Strokes: 누르다 시작/중지 for each stroke or cycle. The stopwatch will calculate and display the average stroke/frequency.
- Stop Measurement: 누르다 시작/중지 to stop counting.
- 재설정 : 누르다 LAP/SPLIT/RESET to clear the measurement.
6. LED 백라이트
To activate the LED backlight for improved visibility:
- 를 누르고 계세요 모드/조명 button for approximately 2 seconds. The backlight will illuminate for a short period.
유지
- 청소: Wipe the stopwatch with a soft, damp 옷감. 강한 화학 물질이나 연마성 세제를 사용하지 마십시오.
- 방수 기능: 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.
- 배터리 교체: 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.
- 저장: Store the stopwatch in a cool, dry place away from direct sunlight and extreme temperatures.
문제 해결
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| 디스플레이가 어둡거나 아무것도 표시되지 않습니다. | 배터리가 부족합니다. | 리튬 배터리를 교체하십시오. |
| 버튼이 반응하지 않습니다. | 일시적인 소프트웨어 오류 또는 배터리 부족입니다. | 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. |
| 노출 후 물이 침투합니다. | Buttons pressed while submerged or seal compromised. | Discontinue use. Allow to dry completely. If issues persist, contact customer support. Avoid pressing buttons underwater. |
| 표시된 시간/날짜가 잘못되었습니다. | 시간/날짜가 올바르게 설정되지 않았습니다. | Refer to "Time and Calendar Mode" instructions to set the correct time and date. |
명세서
- 모델: 490리터
- 상표: 울트락
- 크기(가로x세로x높이): 0.75 x 2.5 x 3.25 인치
- 색상: 검은색
- 재료: 플라스틱 및 고무
- 메모리: 100 Dual Split Recallable Memory
- 표시하다: Large 3-Row Display with LED Backlight
- 타이밍 용량: 최대 10시간
- 기능: Stopwatch, Lap/Split Timing, Memory Recall, Time/Calendar, Stroke/Frequency
- 방수 기능: 예
- 배터리: Lithium (type not specified, typically CR2032 or similar)
- 제조업체: CEI-Ultrak
보증 및 지원
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.
제조업체: CEI-Ultrak





