1. ບົດແນະນຳ
Thank you for choosing the Elitech LDM-50D Laser Distance Meter. This device is designed for precise and efficient distance measurements, offering a range of functions for various applications in home DIY, interior design, and professional construction. This manual provides essential information for safe operation, setup, and maintenance of your device. Please read it thoroughly before use.
The LDM-50D features fast and accurate measurements up to 165ft (50m) with ±2mm precision. It includes versatile functions such as single, continuous, area, volume, and Pythagorean modes. The bright backlit LCD ensures clear readability, and it can store up to 99 measurements. Built-in dual bubble levels enhance measurement accuracy.
2. ຂໍ້ມູນຄວາມປອດໄພ
ຄວາມປອດໄພເລເຊີ: This device emits a Class II laser. Do not stare directly into the laser beam or direct it at other people. Avoid pointing the laser at reflective surfaces. Always operate the device in a safe manner to prevent eye injury.
ຄວາມປອດໄພຫມໍ້ໄຟ:
- Use only AAA alkaline batteries as specified.
- ຢ່າຜະສົມແບດເຕີຣີເກົ່າແລະໃຫມ່, ຫຼືແບດເຕີລີ່ປະເພດຕ່າງໆ.
- ກວດໃຫ້ແນ່ໃຈວ່າໃສ່ໝໍ້ໄຟທີ່ມີຂົ້ວທີ່ຖືກຕ້ອງ.
- ຖອດແບດເຕີຣີອອກຖ້າອຸປະກອນຈະບໍ່ຖືກໃຊ້ເປັນໄລຍະເວລາເພີ່ມເຕີມເພື່ອປ້ອງກັນການຮົ່ວໄຫຼ.
- ຖິ້ມbatteriesໍ້ໄຟທີ່ໃຊ້ແລ້ວໄປຕາມກົດລະບຽບທ້ອງຖິ່ນ.
ຄວາມປອດໄພທົ່ວໄປ:
- ຮັກສາອຸປະກອນໃຫ້ຫ່າງຈາກເດັກນ້ອຍ.
- ຢ່າພະຍາຍາມດັດແປງ ຫຼື ຖອດອຸປະກອນອອກ. ການສ້ອມແປງຄວນປະຕິບັດໂດຍພະນັກງານທີ່ໄດ້ຮັບອະນຸຍາດເທົ່ານັ້ນ.
- ຫຼີກເວັ້ນການເປີດເຜີຍອຸປະກອນກັບອຸນຫະພູມທີ່ຮຸນແຮງ, ຄວາມຊຸ່ມຊື່ນ, ຫຼືແສງແດດໂດຍກົງ.
3. ຜະລິດຕະພັນເກີນview
The Elitech LDM-50D is a compact and durable laser distance meter designed for ease of use and portability. It features a clear backlit display and intuitive button layout.
3.1 ເນື້ອໃນຊຸດ
- Elitech LDM-50D Laser Distance Meter
- 2 x ຫມໍ້ໄຟ AAA
- ສາຍແຂນ
- ຄູ່ມືຜູ້ໃຊ້

Image: Elitech LDM-50D Laser Distance Meter with included batteries, wrist strap, and manual.
3.2 ອົງປະກອບອຸປະກອນ

ຮູບພາບ: ທາງຫນ້າ view of the Elitech LDM-50D Laser Distance Meter, showing the display, control buttons, and dual bubble levels.
The device features a large backlit LCD for clear readings, a 'READ' button for measurements, 'OFF/CLEAR' for power and clearing, and various function buttons for mode selection and unit switching. It also includes dual bubble levels for enhanced accuracy.

ຮູບພາບ: ກັບຄືນໄປບ່ອນ view of the Elitech LDM-50D Laser Distance Meter, showing the battery compartment and product labels.
4. ຕັ້ງຄ່າ
4.1 ການຕິດຕັ້ງຫມໍ້ໄຟ
- ຊອກຫາຝາປິດຊ່ອງໃສ່ຫມໍ້ໄຟຢູ່ດ້ານຫຼັງຂອງອຸປະກອນ.
- ເລື່ອນຝາປິດເປີດ.
- ໃສ່ແບັດເຕີລີ່ AAA ສອງ (2) ອັນ, ຮັບປະກັນການຂົ້ວທີ່ຖືກຕ້ອງ (+/-).
- ປິດຝາປິດຊ່ອງໃສ່ຫມໍ້ໄຟຢ່າງປອດໄພ.
5. ຄໍາແນະນໍາການດໍາເນີນງານ
5.1 ເປີດ/ປິດ
- ເພື່ອເປີດເຄື່ອງ, ກົດປຸ່ມ ອ່ານ ປຸ່ມ.
- ເພື່ອປິດໄຟ, ກົດປຸ່ມແລະກົດປຸ່ມ ປິດ/ລຶບ button for a few seconds. The device will also automatically power off after a period of inactivity.
5.2 ການວັດແທກໄລຍະຫ່າງພື້ນຖານ
- ຊີ້ເລເຊີໄປທີ່ໜ້າຜິວເປົ້າໝາຍ.
- ກົດ ອ່ານ button once. The measurement will appear on the display.

Image: A user holding the Elitech LDM-50D and taking a distance measurement to a wall.
5.3 ການວັດແທກຢ່າງຕໍ່ເນື່ອງ
This mode allows for dynamic measurement as you move the device. Press the mode button until the continuous measurement icon appears. The display will update in real-time as the distance changes.
5.4 ການວັດແທກພື້ນທີ່ ແລະ ປະລິມານ
The LDM-50D can calculate area and volume automatically. Press the mode button to cycle through measurement modes until the desired icon (area or volume) is displayed. Follow the on-screen prompts to take the required length, width, and height measurements. The device will then calculate and display the result.

Image: The Elitech LDM-50D displaying icons for various measurement modes including distance, area, volume, and different Pythagorean calculations.
5.5 ການວັດແທກແບບປີທາໂກຣຽນ
Use the Pythagorean mode for indirect height or diagonal measurements. Press the mode button to select one of the Pythagorean modes (e.g., for single indirect height, double indirect height). Follow the on-screen instructions to take the necessary measurements (e.g., base and hypotenuse). The device will calculate the unknown side.
5.6 ການປ່ຽນຫົວໜ່ວຍ
The device supports multiple units: meters (m), centimeters (cm), feet (ft), inches (in), and fractions. To switch units, long-press the 'U' button until the desired unit is displayed.

Image: The Elitech LDM-50D displaying various measurement units like inches, feet, and meters, with a prompt to long-press a button to switch units.
5.7 ການເກັບຮັກສາຂໍ້ມູນ
The LDM-50D can store up to 99 measurement records. To review stored data, press the memory button. Use the arrow keys to navigate through the records. The top of the screen indicates how many records are saved.

Image: The Elitech LDM-50D display showing multiple measurement records, highlighting the 99-record storage capacity.
5.8 Reference Point Switching
The device allows you to switch the measurement reference point between the front edge and the rear edge of the device. This is useful for measuring from different starting positions. Refer to the display icon to confirm the active reference point.

Image: The Elitech LDM-50D illustrating two different reference points for measurement, from the front or rear of the device.
5.9 ວິດີໂອສາທິດຜະລິດຕະພັນ
Video: A demonstration of the Elitech LDM-50D Laser Distance Meter, showcasing its compact size, instant measurement capabilities, area and volume calculations, Pythagorean mode for indirect measurements, and unit switching functionality. It highlights the device's efficiency and ease of use for various measuring tasks.
6. ບໍາລຸງຮັກສາ
To ensure the longevity and accuracy of your Elitech LDM-50D, follow these maintenance guidelines:
- ທໍາຄວາມສະອາດ: ໃຊ້ອ່ອນ, ງamp cloth to clean the device. Do not use abrasive cleaners or solvents. Clean the laser lens gently with a soft, lint-free cloth.
- ການເກັບຮັກສາ: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods.
- ຄວາມທົນທານ: The device is designed to be dustproof and drop-resistant (IP54, 1m drop resistance). However, avoid unnecessary drops or impacts to maintain accuracy.

Image: The Elitech LDM-50D highlighting its dustproof (IP54) and drop-resistant (1m/3.3ft) construction, made from ABS Engineering Plastic.
7. ການແກ້ໄຂບັນຫາ
If you encounter issues with your LDM-50D, refer to the following common problems and solutions:
| ບັນຫາ | ສາເຫດທີ່ເປັນໄປໄດ້ | ການແກ້ໄຂ |
|---|---|---|
| ອຸປະກອນບໍ່ເປີດ | ແບັດເຕີຣີຕໍ່າ ຫຼື ໝົດ; ການຕິດຕັ້ງແບັດເຕີຣີບໍ່ຖືກຕ້ອງ | ປ່ຽນແບັດເຕີຣີ; ກວດສອບຂົ້ວແບັດເຕີຣີ |
| ການວັດແທກບໍ່ຖືກຕ້ອງ | Unstable surface; Obstruction in laser path; Dirty lens; Measurement taken from wrong reference point | Ensure stable measurement; Clear laser path; Clean lens; Verify reference point setting |
| ບໍ່ເຫັນແສງເລເຊີ | Bright ambient light; Device not powered on | Move to a darker area; Power on device |
| ຈໍສະແດງຜົນແມ່ນມືດມົວ ຫຼືອ່ານບໍ່ໄດ້ | Low batteries; Extreme temperature | Replace batteries; Move to a moderate temperature environment |
8. ຂໍ້ມູນຈໍາເພາະ
| ຄຸນສົມບັດ | ຂໍ້ມູນຈໍາເພາະ |
|---|---|
| ໄລຍະການວັດແທກ | 0.05m to 50m (165ft) |
| ຄວາມຖືກຕ້ອງ | ±2mm (±1/16 inch) |
| ຫົວໜ່ວຍວັດແທກ | m / cm / ft / in / ft+in |
| ຮູບແບບການວັດແທກ | Single, Continuous, Area, Volume, Pythagorean (various types) |
| ບັນທຶກຂໍ້ມູນ | ເຖິງ 99 ກຸ່ມ |
| ຊັ້ນເລເຊີ | ຫ້ອງຮຽນ II, <1mW |
| ຄວາມຍາວຂອງເລເຊີ | 630-670nm |
| ຈໍສະແດງຜົນ | LCD backlit |
| ການສະຫນອງພະລັງງານ | 2 x AAA Alkaline batteries (included) |
| ປິດເລເຊີອັດຕະໂນມັດ | 30 ວິນາທີ |
| Automatic Device Off | 180 ວິນາທີ |
| ອຸນຫະພູມປະຕິບັດການ | 0°C ຫາ 40°C (32°F ຫາ 104°F) |
| ອຸນຫະພູມການເກັບຮັກສາ | -20°C ຫາ 60°C (-4°F ຫາ 140°F) |
| ຂະໜາດ (L x W x H) | 11.2 x 5 x 2.5 ຊມ (4.4 x 2.0 x 1.0 ນິ້ວ) |
| ນ້ຳໜັກ | 0.15 ກິໂລ (0.33 ປອນ) |
| ວັດສະດຸ | ABS ວິສະວະກໍາພາດສະຕິກ |
| ການຈັດອັນດັບ IP | IP54 (Dustproof & Splash-proof) |
| ການຕໍ່ຕ້ານການຫຼຸດລົງ | 1m (3.3ft) |
9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ
Elitech products are manufactured to high-quality standards. For detailed warranty information, please refer to the official Elitech website or the warranty card included with your product. If you require technical support or have questions regarding your LDM-50D Laser Distance Meter, please contact Elitech customer service through their official channels.