1. Introduction
Thank you for choosing the Linshang LS255 Digital Webster Hardness Tester. This portable device is designed for precise and efficient hardness measurement of various soft metals, including aluminum alloys, soft steel, brass, and pure copper. Featuring a clear OLED digital screen, multiple hardness unit display, data storage capabilities, and a convenient rechargeable design, the LS255 offers high precision and ease of use for both field and laboratory applications.
2. Key Features
- Digital OLED Display: Clear 128*64 dot matrix OLED screen for easy reading of measurements.
- Multiple Hardness Units: Supports HWA, HRE, HRF, HRB, HV, and HB scales.
- High Precision: Offers a precision of 0.1 HWA for accurate results.
- Data Storage: Capable of storing up to 9 groups of measurement data.
- Rechargeable Design: Built-in 3.7V@400mAh lithium battery with USB Type-C charging.
- Non-Disassembly Calibration: Convenient calibration process without needing to disassemble the device.
- Wide Application: Suitable for aluminum alloy, soft steel, brass, and pure copper.
3. Package Contents
Upon opening your package, please ensure all items are present and in good condition:
- LS255 Digital Hardness Tester (x1)
- USB Type-C Charging Cable (x1)
- User Manual (this document)
4. Specifications
| Parameter | Value |
|---|---|
| Model | LS255 |
| Display | 128*64 dot matrix OLED |
| Applicable Materials | Aluminum alloy; soft steel; brass; pure copper |
| Hardness Units | HWA, HRE, HRF, HRB, HV, HB |
| Measuring Range (HWA) | 0-20 |
| Measuring Range (HRE) | 23.5-110 |
| Measuring Range (HRF) | 26.2-105.5 |
| Measuring Range (HRB) | 0-85.3 |
| Measuring Range (HV) | 49-155 |
| Measuring Range (HB) | 35.2-153 |
| Precision | 0.1 HWA |
| Measurement Accuracy | ±0.5 HWA |
| Repeatability | 0.5 HWA |
| Measured Material Thickness | 0.6mm - 8mm |
| Measured Material Inner Diameter | >10mm |
| Supply Voltage | DC5V |
| Charging Interface | USB (Type-C) |
| Power Supply | Rechargeable lithium battery 3.7V@400mAh |
| Operating Temperature | -10~50℃, 0~85%RH (no condensation) |
| Storage Temperature | -10~60℃, 0~85%RH (no condensation) |
| Gross Weight | 0.9kg |
| Size | 203*97*30mm |
5. Setup
5.1 Initial Charging
- Before first use, fully charge the LS255. Connect the provided USB Type-C cable to the charging port on the device and to a standard USB power adapter (DC5V).
- The OLED display will show a charging indicator. Once fully charged, the indicator will change or disappear.
5.2 Powering On/Off
- To power on, press and hold the power button (usually marked with a circle and vertical line) until the display illuminates.
- To power off, press and hold the power button again until the display turns off.
5.3 Calibration
The LS255 supports non-disassembly calibration. Refer to the on-screen instructions or specific calibration blocks for your material. Typically, this involves taking a measurement on a known hardness block and adjusting the device if necessary.
6. Operating Instructions
6.1 Preparing for Measurement
- Ensure the surface of the material to be tested is clean, smooth, and free from any contaminants or coatings.
- Verify that the material thickness is within the specified range (0.6mm-8mm) and the inner diameter is greater than 10mm if measuring curved surfaces.
6.2 Taking a Measurement
- Hold the tester firmly with one hand.
- Position the indenter perpendicular to the surface of the material.
- Apply steady pressure to the handle until the indenter fully penetrates the material. You will feel a click or resistance indicating the measurement has been taken.
- Read the hardness value displayed on the OLED screen.
6.3 Changing Hardness Units
The LS255 allows you to switch between different hardness units (HWA, HRE, HRF, HRB, HV, HB). Use the navigation buttons (usually up/down arrows or mode button) to cycle through the available units on the display until your desired unit is selected.
6.4 Data Storage and Recall
The device can store up to 9 groups of measurement data. After taking a measurement, the device may automatically save the reading or require a specific button press to store it. Consult the on-screen prompts or the device's button functions to save and recall stored data.
7. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the LS255 in a dry place, away from direct sunlight and extreme temperatures (-10~60℃, 0~85%RH non-condensing).
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use for extended periods.
- Indenter Inspection: Periodically inspect the indenter for wear or damage. A worn indenter can affect measurement accuracy.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low battery; device malfunction | Charge the device fully. If problem persists, contact support. |
| Inaccurate readings | Needs calibration; worn indenter; improper measurement technique; dirty sample surface | Perform calibration. Inspect indenter. Ensure proper technique and clean sample surface. |
| Display not working | Low battery; device malfunction | Charge the device. If problem persists, contact support. |
9. User Tips
- For consistent results, always ensure the test material is stable and the indenter is applied perpendicular to the surface.
- Take multiple readings in different spots on the same sample and average them for a more reliable hardness value.
- Keep the device and its accessories in the provided case when not in use to protect it from dust and impact.
10. Warranty and Support
Your Linshang LS255 Digital Webster Hardness Tester is covered by a manufacturer's warranty against defects in materials and workmanship. For detailed warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or visit the official Linshang website.
Please retain your proof of purchase for warranty claims.