GOYOJO Portable Leeb Hardness Tester GHL210 User Manual

1. Introduction

This manual provides detailed instructions for the safe and effective operation of the GOYOJO Portable Leeb Hardness Tester, model GHL210. This device is designed for precise hardness measurements across various materials, offering a user-friendly interface and robust data management capabilities. Please read this manual thoroughly before using the instrument to ensure optimal performance and longevity.

2. Safety Information

Always observe the following safety precautions to prevent injury and damage to the instrument:

• Do not attempt to disassemble or modify the instrument. Refer all servicing to qualified personnel.
• Keep the instrument dry and away from extreme temperatures.
• Ensure the impact device is securely connected before use.
• Use only specified batteries (AA alkaline) for power.
• Avoid dropping the instrument or subjecting it to strong impacts.
• Perform measurements on stable surfaces to ensure accuracy.

3. Package Contents

Verify that all items are present in your package:

• GOYOJO Portable Leeb Hardness Tester (GHL210 main unit)
• Standard Impact Device (Type D)
• Test Block (Copper)
• Connection Cable
• Cleaning Brush
• User Manual
• Carrying Case
• AA Alkaline Batteries (2 pcs)
• Small Support Ring
• Large Support Ring

4. Product Overview

The GOYOJO GHL210 features a clear OLED display and intuitive button layout for ease of use. Below is a diagram illustrating the main components of the hardness tester.

Figure 4.1: GOYOJO GHL210 Hardness Tester with labeled components. Key parts include the main unit with OLED display and control buttons, the probe connection cable, the metal port for the cable, the impact device with a release button, and the test block.

Key Function Area:

• MAT (Material): Selects the material type for testing.
• DIR (Direction): Adjusts the impact direction compensation.
• UNIT: Cycles through available hardness units (HL, HV, HB, HRC, HRB, HRA, HS).
• MENU: Accesses the main menu for settings and functions.
• Up/Down Arrows: Navigates menu options and adjusts values.
• Light Bulb: Toggles backlight.
• ENTER/SAVE: Confirms selections or saves data.
• DEL/ESC: Deletes data or exits current menu.
• Power Button: Turns the device on/off.

5. Setup

5.1 Battery Installation

The GHL210 is powered by two AA alkaline batteries, providing over 100 hours of continuous operation. To install or replace batteries:

1. Locate the battery compartment cover on the back of the main unit.
2. Slide the cover open.
3. Insert two AA alkaline batteries, ensuring correct polarity (+/-).
4. Close the battery compartment cover securely.

5.2 Connecting the Impact Device

The impact device connects to the main unit via a cable and metal port.

Figure 5.1: Close-up view of the metal external interface on the main unit, showing where the impact device cable connects.

1. Align the connector of the impact device cable with the metal port on the top of the main unit.
2. Gently push and twist the connector until it is firmly seated.
3. Ensure the connection is secure to prevent measurement errors.

6. Operating Instructions

6.1 Power On/Off

• Press the Power Button to turn the device on.
• The device will automatically enter sleep mode after a period of inactivity and power off to conserve battery life.
• To manually power off, press and hold the Power Button.

6.2 Menu Navigation

The GHL210 features a menu-style operation. Use the MENU button to access the main menu, and the Up/Down Arrows to navigate options. Press ENTER/SAVE to confirm a selection or DEL/ESC to exit.

6.3 Material Selection

Press the MAT button to select the material type corresponding to your test piece. Accurate material selection is crucial for correct hardness conversion.

6.4 Impact Direction Setting

Press the DIR button to set the impact direction. The GHL210 supports 360° measurement directions, allowing for multi-angle testing. Ensure the selected direction matches the actual orientation of the impact device during measurement for accurate compensation.

Figure 6.1: Illustration of the omni-directional impact capability, allowing measurements from various angles.

6.5 Hardness Unit Selection

Press the UNIT button to cycle through the available hardness scales. The GHL210 supports 7 different hardness units:

Figure 6.2: The seven hardness units supported by the GHL210: HRA, HRB, HRC, HL, HB, HV, HS.

• HL: Leeb Hardness
• HV: Vickers Hardness
• HB: Brinell Hardness
• HRC: Rockwell C Hardness
• HRB: Rockwell B Hardness
• HRA: Rockwell A Hardness
• HS: Shore Hardness

6.6 Performing a Measurement

The GHL210 operates on the Leeb hardness principle, measuring the rebound of an impact body. The measurement range is 170-960 HLD.

Figure 6.3: The GHL210 displaying a Leeb hardness measurement (HL) with the impact device positioned on a test block.

1. Ensure the test piece is stable and has a smooth, clean surface.
2. Select the correct material and impact direction.
3. Place the impact device firmly and perpendicularly on the test surface.
4. Press the release button on the impact device to initiate the impact.
5. The hardness value will be displayed on the OLED screen.
6. Repeat measurements multiple times for better accuracy and average results.

6.7 Data Storage and Retrieval

The tester has an extensive data storage capacity, capable of storing up to 350 sets of measurements. Each set includes single measurement values, averages, measurement dates, impact direction, number of impacts, material, and hardness scales.

Figure 6.4: The GHL210 display showing a list of stored measurement data, including measurement number, date, and hardness value.

• After a measurement, press ENTER/SAVE to store the data.
• Navigate to the data storage menu (via MENU) to view or retrieve stored measurements.
• Use Up/Down Arrows to scroll through stored data.

6.8 Alarm Output Function

The alarm output function allows you to set upper and lower hardness limits. If a measurement falls outside these predefined limits, the device will provide a notification, which is particularly useful for batch testing scenarios to ensure quality control.

• Access the alarm settings through the MENU.
• Set the desired upper and lower hardness thresholds.
• Confirm settings with ENTER/SAVE.

6.9 Software Calibration

The GHL210 includes a software calibration feature to ensure accurate and reliable measurements. Regular calibration is recommended, especially when using different impact devices or after prolonged use.

• Access the calibration menu via the MENU button.
• Follow the on-screen prompts to perform the calibration using a standard test block.

7. Specifications

8. Maintenance

8.1 Cleaning

• Wipe the main unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Use the provided cleaning brush to remove any debris from the impact device after use.
• Ensure the test block is clean and free of dust or oil before calibration or testing.

8.2 Storage

• Store the instrument in its carrying case when not in use to protect it from dust and physical damage.
• Store in a cool, dry place, away from direct sunlight and extreme temperatures.
• Remove batteries if the instrument will not be used for an extended period to prevent leakage.

9. Troubleshooting

If you encounter issues with your GOYOJO GHL210, refer to the following common problems and solutions:

If the problem persists after attempting these solutions, please contact customer support.

10. Warranty and Support

The GOYOJO Portable Leeb Hardness Tester GHL210 comes with a standard manufacturer's warranty. For specific warranty terms, please refer to the warranty card included in your package or contact GOYOJO customer service.

For technical support, service, or inquiries, please visit the official GOYOJO website or contact your local distributor. Please have your model number (GHL210) and purchase information ready when seeking support.