1. Pengenalan
The UNI-T UT390B+ is a high-precision laser distance meter designed for accurate and efficient measurements. This versatile device can measure distances, calculate areas, and determine volumes. It also supports indirect measurements using the Pythagorean theorem. Its portable, reliable, and user-friendly design makes it an ideal replacement for traditional measuring tools like tape measures and rulers.
This manual provides essential information on the safe operation, features, setup, and maintenance of your UT390B+ Laser Distance Meter. Please read it thoroughly before using the device.
2. Maklumat Keselamatan
AMARAN: This device emits Class 2 laser radiation. Do not stare into the laser beam or direct it at other people. Eye damage can occur.
- Jangan cuba mengubah suai atau membuka peranti.
- Jauhkan peranti daripada capaian kanak-kanak.
- Elakkan penggunaan peranti ini dalam persekitaran yang mudah meletup atau berhampiran bahan mudah terbakar.
- Ensure the measurement surface is not highly reflective or transparent, as this can affect accuracy.
- Lindungi peranti daripada suhu melampau, kelembapan dan hentaman kuat.
3. Ciri-ciri Produk
- Ketepatan Tinggi: ±2 mm
- Julat Pengukuran: Sehingga 40 meter
- Unit Pengukuran Berbilang: Meters (m), Inches (in), Feet (ft)
- Jenis Laser: Class 2, 620-680 nm, <1 mW
- Fungsi: Single distance measurement, Continuous measurement, Area calculation, Volume calculation, Pythagorean theorem (indirect measurement), Addition/Subtraction of measurements, Max/Min value tracking.
- Ciri Automatik: Auto calibration, Automatic laser shutdown, Automatic power-off.
- paparan: Backlit LCD with battery level indicator.
- Ketahanan: IP68 water resistance rating.
- Hayat Bateri: Lebih kurang 8000 ukuran.
4. Komponen dan Kawalan

An image of the UNI-T UT390B+ Laser Distance Meter. The device is red and black, featuring a digital display showing measurement readings in feet, battery level, and MAX/MIN indicators. Below the display, a spirit level is visible. To the right of the display are several control buttons: a large red 'READ' button, '+/-' for addition/subtraction, 'OFF/CLEAR' for power and clearing, a unit selection button, and a function selection button.
4.1. Peranti Lebihview
- Pemancar/Penerima Laser: Terletak di bahagian atas peranti.
- Paparan LCD: Shows measurement values, units, battery status, and function indicators.
- Spirit Level: Integrated for horizontal alignment.
4.2. Butang Kawalan
- READ Button (Red): Initiates a single measurement or continuous measurement.
- +/- Butang: Used to add or subtract measurements.
- Butang OFF/CLEAR: Short press to clear the last measurement; long press to power off the device.
- Unit Button (U icon): Cycles through measurement units (m, in, ft).
- Function Button (Square with lines icon): Selects measurement modes (Area, Volume, Pythagorean).
5. Persediaan
5.1. Pemasangan Bateri
- Cari penutup petak bateri di bahagian belakang peranti.
- Buka penutup dengan menggeser atau membuka selaknya.
- Insert two AAA Alkaline batteries, ensuring correct polarity (+/-).
- Tutup penutup petak bateri dengan selamat.
Nota: Always use new batteries of the same type. Remove batteries if the device will not be used for an extended period.
6. Arahan Operasi
6.1. Hidupkan/Mati Kuasa
- Hidupkan kuasa: Tekan ke BACA butang.
- Matikan: Tekan lama OFF/CLEAR button. The device will also automatically power off after a period of inactivity.
6.2. Basic Distance Measurement
- Halakan laser pada permukaan sasaran.
- Tekan ke BACA button once. The measured distance will appear on the display.
6.3. Continuous Measurement (Tracking)
- Tekan dan tahan butang BACA button. The device will continuously measure the distance as you move it.
- The display will show the current, maximum (MAX), and minimum (MIN) distances.
- Lepaskan BACA button to stop continuous measurement.
6.4. Pengukuran Kawasan
- Tekan ke Fungsi button until the area icon (a square) appears on the display.
- Measure the first side (length) by pressing BACA.
- Measure the second side (width) by pressing BACA sekali lagi.
- Kawasan yang dikira akan dipaparkan.
6.5. Pengukuran Isipadu
- Tekan ke Fungsi button until the volume icon (a cube) appears on the display.
- Ukur panjang dengan menekan BACA.
- Ukur lebar dengan menekan BACA.
- Ukur ketinggian dengan menekan BACA.
- Isipadu yang dikira akan dipaparkan.
6.6. Pythagorean Measurement (Indirect Measurement)
This function allows you to measure inaccessible heights or distances using two or three measurements.
- Tekan ke Fungsi button until the Pythagorean icon (a triangle) appears. Follow the on-screen prompts for the required measurements (e.g., hypotenuse, base).
- Take the necessary measurements by pressing BACA untuk setiap segmen.
- The device will automatically calculate the unknown side.
6.7. Menambah/Menolak Ukuran
- Lakukan pengukuran.
- Tekan ke +/- button. A '+' or '-' symbol will appear.
- Lakukan pengukuran seterusnya.
- The result of the addition or subtraction will be displayed. This can be done for lengths, areas, and volumes.
6.8. Menukar Unit Pengukuran
Tekan ke Unit button (U icon) to cycle through the available units: meters (m), inches (in), and feet (ft).
7. Spesifikasi
| Ciri | Spesifikasi |
|---|---|
| Model | UT390B+ |
| Julat Pengukuran | 0.05m - 40m |
| Ketepatan | ±2 mm |
| Unit Pengukuran | m / dalam / kaki |
| Kelas Laser | Class 2, 620-680 nm, <1 mW |
| Jenis Bateri | Alkaline (AAA) |
| Hayat Bateri | Lebih kurang 8000 ukuran |
| Laser Automatik Mati | ya |
| Matikan Automatik | ya |
| Tahan Air | IP68 |
| Suhu Operasi | 0°C hingga 40°C (32°F hingga 104°F) |
| Suhu Penyimpanan | -20°C hingga 60°C (-4°F hingga 140°F) |
| Dimensi Produk | 5 x 23 x 10.8 cm |
| Berat Produk | 620 gram |
8. Penyelenggaraan
- Pembersihan: Gunakan yang lembut, damp kain untuk membersihkan peranti. Jangan gunakan pembersih atau pelarut yang melelas.
- Storan: Store the device in a dry, cool place, away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods.
- Kanta Laser: Keep the laser lens clean to ensure accurate measurements. Use a soft, lint-free cloth.
9. Penyelesaian masalah
| Masalah | Kemungkinan Punca | Penyelesaian |
|---|---|---|
| Peranti tidak dihidupkan | Bateri rendah atau mati; pemasangan bateri yang salah. | Gantikan bateri; periksa kekutuban bateri. |
| Mesej "Ralat" dipaparkan | Measurement range exceeded; laser beam obstructed; highly reflective/transparent surface. | Ensure target is within range (0.05m-40m); clear obstructions; use a target plate for difficult surfaces. |
| Pengukuran yang tidak tepat | Dirty laser lens; unstable measurement position; extreme environmental conditions. | Clean laser lens; ensure stable measurement; avoid extreme temperatures or vibrations. |
| Laser does not emit | Device malfunction; safety lockout. | Restart device; if problem persists, contact support. |
10. Waranti dan Sokongan
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your local UNI-T distributor. Keep your proof of purchase for warranty claims.