1. Introduction
The Linshang LS252D Leeb Hardness Tester is a state-of-the-art instrument designed for precise and reliable hardness testing of various metal materials. Featuring an integrated D-type impact device and advanced dual-coil technology, it offers exceptional accuracy and the ability to measure in confined spaces and at any angle. This manual provides comprehensive instructions for the proper use, maintenance, and troubleshooting of your LS252D Leeb Hardness Tester.
Figure 1.1: The Linshang LS252D Leeb Hardness Tester, a compact and integrated device for metal hardness measurement.
2. Safety Information
Please read all safety instructions carefully before operating the device to ensure safe and proper use. Failure to follow these guidelines may result in injury or damage to the instrument.
- Always handle the device with care to prevent drops or impacts.
- Do not attempt to disassemble or modify the instrument. Repairs should only be performed by authorized personnel.
- Keep the device away from extreme temperatures, humidity, and corrosive environments.
- Ensure the measurement surface is stable and secure before performing a test.
- Use only the specified accessories and power sources.
- Dispose of batteries according to local regulations.
3. Product Components and Packaging List
The LS252D Leeb Hardness Tester comes with the following standard components:
Figure 3.1: Overview of the LS252D Leeb Hardness Tester and its included accessories.
Packaging List:
- LS252D Leeb Hardness Tester (Main Unit) x 1
- Calibration Report x 1
- Nylon Brush x 1
- Small Support Ring x 1
- USB Data Cable x 1
- User Manual x 1
- Warranty Card x 1
4. Setup and Initial Use
The LS252D Leeb Hardness Tester features an integrated design, making setup straightforward. The device is powered by a built-in Lithium Ion battery (included).
- Charging the Device: Before first use, ensure the device is fully charged using the provided USB data cable. Connect the cable to the USB port on the tester and to a standard USB power adapter (not included) or computer USB port. The charging indicator will show the charging status.
- Power On/Off: Press and hold the power button (usually marked with a power symbol) to turn the device on or off.
- Familiarization: Take a moment to familiarize yourself with the device's buttons and display. The integrated design means the impact device is permanently attached.
Figure 4.1: The integrated design of the LS252D, highlighting its compact form factor.
5. Operating Instructions
5.1 Measurement Principle and Impact Device
The LS252D utilizes a D-type impact device, which is ideal for measuring metal hardness in narrow spaces such as grooves or gears. The device measures the rebound of an impact body to determine hardness.
Figure 5.1: The D-type impact device, designed for precise measurements in various metallic materials.
For accurate measurements, the measured object should have a minimum mass of 5 kg and a minimum thickness of 25 mm. If the weight or thickness does not meet these requirements, the object must be coupled to a solid support for testing. The minimum thickness of the measured object after coupling is 3mm.
5.2 360° Measurement and Directional Sensor
The LS252D features a built-in directional sensor that automatically compensates for angle errors, ensuring accurate 360° measurements. This allows for flexible testing in various orientations without manual adjustment.
Figure 5.2: The LS252D allows for 360° measurement, providing accurate results regardless of the impact direction.
Figure 5.3: The internal directional sensor automatically adjusts for various measurement angles.
5.3 Hardness Scale Conversions
The LS252D can switch between various hardness scales, including Leeb (HL), Vickers (HV), Brinell (HB), Shore (HS), and Rockwell (HRA/HRB/HRC) without requiring manual lookup tables. This is facilitated by its dual-coil technology.
Figure 5.4: The LS252D supports conversion between 7 different hardness scales.
Figure 5.5: Easily switch between hardness scales directly on the device.
5.4 Applications and Usage Examples
The LS252D is suitable for a wide range of applications, including quality control, material selection, and failure analysis in various industries. It is capable of measuring a wide range of metal materials such as steel, aluminum, copper, and iron.
Figure 5.6: Examples of wide range of applications for the LS252D, including large components and automotive parts.
5.5 Product Overview Video
Video 5.1: An official overview of the Linshang LS252 series Leeb Hardness Tester, demonstrating its features and applications.
6. Maintenance
Proper maintenance ensures the longevity and accuracy of your LS252D Leeb Hardness Tester.
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use abrasive cleaners or solvents. For the impact device, use the provided nylon brush to remove any debris after use.
- Storage: Store the device in its original packaging or a protective case when not in use. Keep it in a cool, dry place, away from direct sunlight and strong magnetic fields.
- Battery Care: If the device will not be used for an extended period, charge it periodically to maintain battery health.
- Calibration: Regular calibration is recommended to ensure continued accuracy. Refer to the calibration report and contact the manufacturer for recommended calibration intervals.
7. Troubleshooting
This section addresses common issues you might encounter with your LS252D Leeb Hardness Tester. If the problem persists, please contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery or discharged battery. | Charge the device using the provided USB cable. |
| Inaccurate readings. | Improper coupling to the test piece; test piece too thin or light; dirty impact device; need for calibration. | Ensure proper coupling; use a solid support for thin/light samples; clean the impact device; consider professional calibration. |
| Display not working. | Device malfunction; extreme temperature. | Try restarting the device. Ensure operating within specified temperature range. Contact support if issue persists. |
8. Specifications
Technical specifications for the Linshang LS252D Leeb Hardness Tester:
| Parameter | Value |
|---|---|
| Model Number | GT-LS252D |
| Item Weight | 2.2 Pounds |
| Batteries | 1 Lithium Ion battery (included) |
| Manufacturer | Shenzhen Linshang Technology Co., Ltd. |
| Country of Origin | China |
| First Available Date | August 29, 2024 |
| Impact Device Type | D-type (Integrated) |
| Measurement Accuracy | ±6HL (as per feature bullets) |
| Hardness Scales | HL, HV, HB, HS, HRA, HRB, HRC |
| Measurement Direction | 360° (Automatic compensation) |
Figure 8.1: Certification indicating the reliability and stability of the LS252D's measurements.
9. Warranty and Support
The Linshang LS252D Leeb Hardness Tester is manufactured by Shenzhen Linshang Technology Co., Ltd. For specific warranty details, please refer to the Warranty Card included in your product packaging. For technical support, service, or inquiries, please contact the manufacturer or your authorized dealer.
You can also visit the official Linshang store for more information: Linshang Store on Amazon.
