1. Ro-ràdh
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. Toradh thallview
2.1 Prìomh fheartan
- 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
- Prìomh phutan: Used for power on, single measurement, and confirming selections.
- Putan F/R: Functions switch / Front-Rear reference switch.
- Power Off / Backlit Button: Turns the device off and controls the LCD backlight.
- Taisbeanadh: Shows measurement values, units, battery status, laser strength, and measurement mode icons.
3. Suidhich
3.1 A’ cur cosgais air an inneal
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.
- Ceangail ceann eile a’ chàball USB ri inneal-atharrachaidh cumhachd USB àbhaisteach (nach eil air a ghabhail a-steach) no ri port USB coimpiutair.
- The battery indicator on the display will show charging status. Charge fully before first use.

Figure 3: USB Charging Port
3.2 Powering On/Off and Backlight
- Cumhachd air: Goirid brùth am prìomh phutan.
- Cumhachd dheth: Long press the Power Off / Backlit button.
- Smachd solais cùl: Short press the Power Off / Backlit button to toggle the LCD backlight on or off.

Figure 4: LCD Backlight in Operation
3.3 Setting Measurement Reference Point
The device allows you to choose the measurement reference point:
- Iomradh Aghaidh: 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 F/R button. An icon on the display will indicate the currently selected reference point.
3.4 Ag atharrachadh Aonadan Tomhais
The LT-40 supports meters (m), inches (in), and feet (ft).
- To cycle through units, long press the F/R button. The unit displayed on the screen will change accordingly.
4. Operation - Measurement Modes
The LT-40 offers various measurement functions. To switch between modes, short press the F/R button until the desired mode icon appears on the display.
4.1 Tomhas Singilte
Measures the direct distance between the device and a target.
- Tionndaidh air an inneal.
- 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.

Figear 5: Tomhas Singilte
4.2 Tomhas Leantainneach (Lorg)
Measures distances continuously as the device is moved, displaying real-time maximum and minimum values.
- Tionndaidh air an inneal.
- 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 Tomhas Sgìre
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).
- Nì an inneal obrachadh a-mach agus taisbeanadh den raon gu fèin-ghluasadach.

Figear 7: Tomhas na Farsaingeachd
4.4 Tomhas Tomhas
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).
- Nì an inneal obrachadh a-mach agus taisbeanaidh e an tomhas-lìonaidh gu fèin-ghluasadach.

Figear 8: Tomhas Meud
4.5 Tomhas Pythagorean
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. Cumail suas
5.1 Glanadh
- Sguab an inneal le bog, damp aodach. Na cleachd luchd-glanaidh sgudail no solventan.
- 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 Stòradh
- Stòraich an inneal ann an àite fionnar, tioram, air falbh bho sholas dìreach na grèine agus teòthachd anabarrach.
- Ma tha thu ga stòradh airson ùine mhòr, dèan cinnteach gu bheil am bataraidh air a ghearradh gu ìre (timcheall air 50%) gus beatha a’ bhataraidh a leudachadh.
6. A ’dèanamh trioblaid
If you encounter issues with your LT-40, please refer to the following common problems and solutions:
| Trioblaid | Adhbhar a dh’fhaodadh a bhith ann | Fuasgladh |
|---|---|---|
| Chan eil cumhachd aig an inneal | Bataraidh ìosal no gun chosgais | Cuir cosgais air an inneal le bhith a’ cleachdadh a’ chàball USB. |
| Tomhais neo-mhearachdach | 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. |
| Tha an taisbeanadh beag no neo-leughaidh | Tha an solas cùil dheth; Bataraidh ìosal. | Short press the Power Off / Backlit button to turn on the backlight; Charge the device. |
| Bidh an inneal a’ reothadh no a’ fàs neo-fhreagairteach | Mearachd bathar-bog sealach. | Long press the Power Off / Backlit button to force a shutdown, then restart the device. |
7. Sònrachaidhean
| Feart | Sònrachadh |
|---|---|
| Modail | LT-40 |
| Raon Tomhais | Suas gu 40 meatairean (131 troighean) |
| Aonadan | m / ann / ft |
| Clas laser | Class II, Output power <1mW |
| Seòrsa bataraidh | Lithium-Ion (rechargeable via Micro-USB) |
| Stuth | Alùmanum alloy agus ABS |
| Dath | Glas |
| Meudan toraidh | 5.6 x 1.2 x 2.1 cm |
| Cuideam nì | 28 g |
| Ìre an aghaidh uisge | Uisge-dhìonach (rangachadh IP54) |
8. Barantas & Taic
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 weblàrach-lìn airson fiosrachadh conaltraidh.
Feuch an glèidh thu an dearbhadh ceannach agad airson tagraidhean barantais.