ແນະນຳ
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.
ຄຸນນະສົມບັດທີ່ສໍາຄັນ
- 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.
ຕັ້ງຄ່າ
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.
ການກວດກາເບື້ອງຕົ້ນ
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.

ຮູບທີ 1: ດ້ານໜ້າ 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.
ຄໍາແນະນໍາການດໍາເນີນງານ
1. Basic Stopwatch Function (Start, Stop, Reset)
- ເລີ່ມເວລາ: ກົດ ເລີ່ມ/ຢຸດ ປຸ່ມ (ເບື້ອງຂວາເທິງ) ເພື່ອເລີ່ມຕົ້ນການຈັບເວລາ.
- Stop Timing: ກົດ ເລີ່ມ/ຢຸດ button again to pause the timer.
- Resume Timing: ກົດ ເລີ່ມ/ຢຸດ button to continue from where it was paused.
- ຣີເຊັດໂມງຈັບເວລາ: 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.
- ເລີ່ມ: ກົດ ເລີ່ມ/ຢຸດ ເພື່ອເລີ່ມຕົ້ນ.
- Record Split/Lap: ກົດ 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.
- ສືບຕໍ່: 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.
- ຢຸດ: ກົດ ເລີ່ມ/ຢຸດ to end the timing session.

ຮູບທີ 2: ໃກ້ຊິດ 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. Recall ຄວາມຊົງຈໍາ
The stopwatch can store up to 100 split/lap times. These can be recalled even during an ongoing timing session.
- Enter Recall Mode: ກົດ ເອີ້ນຄືນ button (top center).
- Navigate Memory: ໃຊ້ LAP/SPLIT/RESET button to scroll forward through recorded splits/laps.
- Exit Recall Mode: ກົດ ເອີ້ນຄືນ button again to return to the current timing display or time mode.
4. Time and Calendar Mode
ເຖິງ view ເວລາ ແລະວັນທີປະຈຸບັນ:
- ໂໝດສະຫຼັບ: ກົດ MODE/ແສງ button (bottom right) to cycle through different modes until the time and calendar are displayed.
- ກຳນົດເວລາ/ວັນທີ: ໃນໂໝດເວລາ, ກົດຄ້າງໄວ້ MODE/ແສງ button until the digits flash. Use LAP/SPLIT/RESET ເພື່ອປັບຄ່າ ແລະ ເລີ່ມ/ຢຸດ to move to the next setting. Press MODE/ແສງ ເພື່ອຢືນຢັນແລະອອກ.
5. Stroke/Frequency Mode
This mode is used to measure strokes per minute or frequency.
- Enter Stroke Mode: ກົດ MODE/ແສງ button until "STROKE" or "FREQ" appears on the display.
- ເລີ່ມການວັດແທກ: ກົດ ເລີ່ມ/ຢຸດ.
- Count Strokes: ກົດ ເລີ່ມ/ຢຸດ for each stroke or cycle. The stopwatch will calculate and display the average stroke/frequency.
- ການວັດແທກການຢຸດ: ກົດ ເລີ່ມ/ຢຸດ to stop counting.
- ຕັ້ງຄ່າ ໃໝ່: ກົດ LAP/SPLIT/RESET to clear the measurement.
6. ໄຟ LED Backlight
To activate the LED backlight for improved visibility:
- ກົດຄ້າງໄວ້ MODE/ແສງ button for approximately 2 seconds. The backlight will illuminate for a short period.
ບໍາລຸງຮັກສາ
- ທໍາຄວາມສະອາດ: Wipe the stopwatch with a soft, damp ຜ້າ. ຢ່າໃຊ້ສານເຄມີທີ່ຮຸນແຮງຫຼືເຄື່ອງເຮັດຄວາມສະອາດຂັດ.
- ຄວາມຕ້ານທານນ້ໍາ: 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.
- ການປ່ຽນແບັດເຕີຣີ: 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.
- ການເກັບຮັກສາ: Store the stopwatch in a cool, dry place away from direct sunlight and extreme temperatures.
ການແກ້ໄຂບັນຫາ
| ບັນຫາ | ສາເຫດທີ່ເປັນໄປໄດ້ | ການແກ້ໄຂ |
|---|---|---|
| ຈໍສະແດງຜົນແມ່ນມືດ ຫຼືຫວ່າງເປົ່າ. | ແບັດເຕີຣີຕໍ່າ. | ປ່ຽນແບັດ lithium. |
| ປຸ່ມບໍ່ຕອບສະໜອງ. | ຊອບແວຂັດຂ້ອງຊົ່ວຄາວ ຫຼື ແບັດເຕີຣີຕໍ່າ. | 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. |
| ນ້ຳເຂົ້າຫຼັງຈາກການສຳຜັດ. | Buttons pressed while submerged or seal compromised. | Discontinue use. Allow to dry completely. If issues persist, contact customer support. Avoid pressing buttons underwater. |
| ສະແດງເວລາ/ວັນທີບໍ່ຖືກຕ້ອງ. | Time/date not set correctly. | Refer to "Time and Calendar Mode" instructions to set the correct time and date. |
ຂໍ້ມູນຈໍາເພາະ
- ຕົວແບບ: 490L
- ຍີ່ຫໍ້: Ultrak
- ຂະໜາດ (LxWxH): 0.75 x 2.5 x 3.25 ນິ້ວ
- ສີ: ດຳ
- ວັດສະດຸ: ພາດສະຕິກແລະຢາງ
- ໜ່ວຍຄວາມຈຳ: 100 Dual Split Recallable Memory
- ຈໍສະແດງຜົນ: Large 3-Row Display with LED Backlight
- ຄວາມອາດສາມາດກໍານົດເວລາ: ສູງສຸດ 10 ຊົ່ວໂມງ
- ຟັງຊັນ: Stopwatch, Lap/Split Timing, Memory Recall, Time/Calendar, Stroke/Frequency
- ຄວາມຕ້ານທານນ້ໍາ: ແມ່ນແລ້ວ
- ແບັດເຕີຣີ: Lithium (type not specified, typically CR2032 or similar)
- ຜູ້ຜະລິດ: CEI-Ultrak
ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ
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.
ຜູ້ຜະລິດ: CEI-Ultrak





