1. المقدمة
Thank you for choosing the WANLUTECH LT-40 Mini Laser Distance Meter. This compact and versatile tool is designed for accurate distance, area, and volume measurements, featuring multiple measurement modes and a clear LCD backlight. This manual provides essential information for safe and effective use of your device.
2. انتهى المنتجview
2.1 الميزات الرئيسية
- Multiple Measurement Modes: Includes single, continuous, area, volume, and Pythagorean measurements.
- Compact Design: Small size (5.6 x 1.2 x 2.1 cm) and lightweight (28g) with an aluminum alloy housing for portability.
- Long Measuring Distance: Measures up to 131ft (40m).
- USB Charging: Convenient micro-USB charging port.
- LCD Backlight: Ensures clear data readability in various lighting conditions.
- Selectable Reference Points: Choose between front or rear reference for measurements.
- Unit Conversion: Switch between meters (m), inches (in), and feet (ft).
2.2 Device Components and Display
The following diagram illustrates the main components and display indicators of the LT-40 Laser Distance Meter.

Figure 1: LT-40 Device Layout and Function Buttons

Figure 2: LT-40 Display Indicators and Dimensions
- الزر الرئيسي: Used for power on, single measurement, and confirming selections.
- زر F/R: Functions switch / Front-Rear reference switch.
- Power Off / Backlit Button: Turns the device off and controls the LCD backlight.
- عرض: Shows measurement values, units, battery status, laser strength, and measurement mode icons.
3. الإعداد
3.1 شحن الجهاز
The LT-40 features a built-in Lithium-Ion battery and is rechargeable via a micro-USB port.
- Connect the provided micro-USB cable to the device's charging port.
- قم بتوصيل الطرف الآخر من كابل USB بمحول طاقة USB قياسي (غير متضمن) أو بمنفذ USB الخاص بالكمبيوتر.
- سيُظهر مؤشر البطارية على الشاشة حالة الشحن. اشحن الجهاز بالكامل قبل الاستخدام الأول.

الشكل 3: منفذ شحن USB
3.2 Powering On/Off and Backlight
- تشغيل الطاقة: اضغط لفترة قصيرة على الزر الرئيسي.
- إيقاف التشغيل: Long press the Power Off / Backlit button.
- التحكم في الإضاءة الخلفية: Short press the Power Off / Backlit button to toggle the LCD backlight on or off.

Figure 4: LCD Backlight in Operation
3.3 تحديد نقطة مرجعية للقياس
The device allows you to choose the measurement reference point:
- المرجع الأمامي: Measurements are taken from the front edge of the device. The device's length is not included in the result.
- Rear Reference: Measurements are taken from the rear edge of the device. The device's length is included in the result.
To switch between reference points, short press the ف/ر button. An icon on the display will indicate the currently selected reference point.
3.4 تغيير وحدات القياس
The LT-40 supports meters (m), inches (in), and feet (ft).
- To cycle through units, long press the ف/ر زر. ستتغير الوحدة المعروضة على الشاشة تبعاً لذلك.
4. Operation - Measurement Modes
The LT-40 offers various measurement functions. To switch between modes, short press the ف/ر button until the desired mode icon appears on the display.
4.1 القياس الفردي
Measures the direct distance between the device and a target.
- قم بتشغيل الجهاز.
- Point the laser at the desired target.
- Short press the main button to emit the laser.
- Short press the main button again to take the measurement. The result will be displayed instantly.

الشكل 5: قياس واحد
4.2 القياس المستمر (التتبع)
Measures distances continuously as the device is moved, displaying real-time maximum and minimum values.
- قم بتشغيل الجهاز.
- Long press the main button for approximately 1 second to enter continuous measurement mode.
- Move the device slowly. The display will update with real-time measurements, showing MAX and MIN values.
- Short press the main button again to exit continuous measurement mode.

Figure 6: Continuous Measurement
4.3 قياس المنطقة
Calculates the area of a rectangular surface by measuring two sides.
- Select the Area Measurement mode (icon: rectangle).
- Short press the main button to measure the first side (e.g., length).
- Short press the main button again to measure the second side (e.g., width).
- سيقوم الجهاز تلقائيًا بحساب المساحة وعرضها.

الشكل 7: قياس المساحة
4.4 قياس الحجم
Calculates the volume of a space by measuring three dimensions.
- Select the Volume Measurement mode (icon: cube).
- Short press the main button to measure the first dimension (e.g., length).
- Short press the main button again to measure the second dimension (e.g., width).
- Short press the main button a third time to measure the third dimension (e.g., height).
- سيقوم الجهاز تلقائيًا بحساب مستوى الصوت وعرضه.

الشكل 8: قياس الحجم
4.5 القياس الفيثاغورسي
Uses the Pythagorean theorem to calculate indirect distances.

Figure 9: Pythagorean Measurement Modes
4.5.1 Primary Pythagorean Mode (Indirect Height)
Calculates the height of an object (side 'a') by measuring the hypotenuse ('c') and the base ('b').
- Select the Primary Pythagorean mode (icon: right triangle with 'a' unknown).
- Short press the main button to measure the hypotenuse (data 'c').
- Short press the main button again to measure the base (data 'b').
- The device will automatically calculate and display the height (data 'a').
4.5.2 Secondary Pythagorean Mode (Data Addition)
Calculates a total height (a1+a2) by measuring two hypotenuses and two bases.
- Select the Secondary Pythagorean mode (data addition) (icon: two right triangles stacked).
- Short press the main button to measure the first hypotenuse (data 'c').
- Short press the main button again to measure the first base (data 'b').
- Short press the main button a third time to measure the second hypotenuse (data 'e').
- The device will automatically calculate and display the total height (a1+a2).
4.5.3 Secondary Pythagorean Mode (Data Subtraction)
Calculates a height difference (a) by measuring two hypotenuses and two bases.
- Select the Secondary Pythagorean mode (data subtraction) (icon: two right triangles overlapping).
- Short press the main button to measure the first hypotenuse (data 'e').
- Short press the main button again to measure the first base (data 'c').
- Short press the main button a third time to measure the second base (data 'b').
- The device will automatically calculate and display the height difference (data 'a').
5. الصيانة
5.1 التنظيف
- امسح الجهاز بقطعة ناعمة ، دamp القماش. لا تستخدم المنظفات أو المذيبات الكاشطة.
- Keep the laser lens clean and free of dust or debris to ensure accurate measurements. Use a soft, lint-free cloth for the lens.
5.2 التخزين
- قم بتخزين الجهاز في مكان بارد وجاف، بعيدًا عن أشعة الشمس المباشرة ودرجات الحرارة القصوى.
- في حالة التخزين لفترة طويلة، تأكد من شحن البطارية جزئيًا (حوالي 50٪) لإطالة عمر البطارية.
6. استكشاف الأخطاء وإصلاحها
If you encounter issues with your LT-40, please refer to the following common problems and solutions:
| مشكلة | السبب المحتمل | حل |
|---|---|---|
| الجهاز لا يعمل | بطارية منخفضة أو لا يوجد شحن | اشحن الجهاز باستخدام كابل USB. |
| قياسات غير دقيقة | Laser lens is dirty; Unstable measurement surface; Incorrect reference point selected; Strong light interference. | Clean the laser lens; Ensure a stable surface; Verify the front/rear reference setting; Measure in a shaded area or use a target plate in bright conditions. |
| العرض باهت أو غير قابل للقراءة | الإضاءة الخلفية مطفأة، البطارية ضعيفة. | Short press the Power Off / Backlit button to turn on the backlight; Charge the device. |
| يتجمد الجهاز أو يصبح غير مستجيب | خلل مؤقت في البرنامج. | Long press the Power Off / Backlit button to force a shutdown, then restart the device. |
7. المواصفات
| ميزة | مواصفة |
|---|---|
| نموذج | ال تي-40 |
| مدى القياس | حتى 40 أمتار (131 قدمًا) |
| الوحدات | م / في / قدم |
| دورة الليزر | Class II, Output power <1mW |
| نوع البطارية | Lithium-Ion (rechargeable via Micro-USB) |
| مادة | سبائك الألومنيوم و ABS |
| لون | رمادي |
| أبعاد المنتج | 5.6 × 1.2 × 2.1 سم |
| وزن العنصر | 28 جرام |
| مستوى مقاومة الماء | مقاوم للماء (تصنيف IP54) |
8. الضمان والدعم
WANLUTECH is dedicated to providing high-quality products and excellent customer service. For any questions, technical support, or warranty inquiries regarding your LT-40 Mini Laser Distance Meter, please contact our customer support team through the retailer where you purchased the product or visit the official WANLUTECH webموقع لمعلومات الاتصال.
يرجى الاحتفاظ بإثبات الشراء الخاص بك لمطالبات الضمان.





