UNI-T UT347A Leeb Hardness Tester

1. Introducció

The UNI-T UT347A Leeb Hardness Tester is a precise and portable instrument designed for measuring the hardness of various metal materials. It features a 640x480 pixel display, thermal printing capabilities, and supports multiple hardness scales. This device is ideal for field hardness testing of large equipment such as roller turboshafts, pressure vessels, and turbine sets, finding extensive use in industries like petrochemical, electric power, automotive, shipbuilding, and machinery manufacturing.

Figure 1: UNI-T UT347A Leeb Hardness Tester with impact device and calibration block.

2. Informació de seguretat

Please read and understand all safety instructions before operating the UT347A Leeb Hardness Tester. Failure to follow these instructions may result in injury or damage to the instrument.

• Always wear appropriate personal protective equipment (PPE) when conducting tests.
• Ensure the test surface is stable and secure to prevent movement during impact.
• No intenteu desmuntar ni modificar l'instrument. Encarregueu tot el manteniment a personal qualificat.
• Keep the instrument away from water, dust, and extreme temperatures.
• Feu servir només el cable de càrrega i l'adaptador de corrent especificats.
• Avoid direct impact on sensitive electronic components or fragile materials.

3. Contingut del paquet

Verifiqueu que tots els articles siguin presents i en bon estat en desempaquetar-los:

• UT347A Leeb Hardness Tester Main Unit
• Impact Device (D-type standard)
• Standard Hardness Block
• Cable USB-Type C
• Power Adapter (DC5V 2A)
• Raspall de neteja
• Manual d'usuari
• Maleta de transport

4. Producte acabatview

Figure 2: Key features of the UT347A main unit, including LED lighting, camera, and rear lid bracket.

4.1 Característiques clau

• Visualització: 2.8-inch 320x240 graphic dot matrix color TFT screen with adjustable backlight.
• Escales de duresa: Supports HL, HB, HRC, HRB, HV, HS.
• Dispositius d'impacte: Compatible with 7 different impact devices (automatic identification without calibration).
• Modes de mesura: Statistical, Multi-unit, Line chart, Histogram.
• Emmagatzematge de dades: 900 groups of data storage and 900 groups of pictures storage (640x480 pixels BMP format).
• Connectivitat: Mobile phone Bluetooth APP and PC software for data analysis and synchronization.
• Impressió: Built-in thermal printer for real-time measurement printing (uses 57mm width thermal printing paper).
• Indicadors: Tri-color LED indication (red, yellow, green) for alarm prompts.
• Característiques addicionals: LED flashlight, voice prompt, auto power-off (1/5/10/30 minutes or cancel), low battery indication, 1m drop test rating.

Figure 3: Visual representation of the tester's main functions.

5. Configuració

5.1 Càrrega de la bateria

The UT347A is equipped with a built-in 3.7V 2500mAh polymer rechargeable lithium battery. Before initial use, fully charge the device.

1. Connect the USB Type-C cable to the charging port on the side of the tester.
2. Connect the other end of the cable to the provided DC5V 2A power adapter.
3. Connecteu l'adaptador de corrent a una presa de corrent adequada.
4. The charging time is approximately 2-4 hours. The battery indicator on the display will show charging status.

Figure 4: Charging the UT347A Leeb Hardness Tester.

5.2 Connexió del dispositiu d'impacte

The impact device is crucial for measurement. The UT347A automatically identifies the connected impact device.

1. Locate the connector port on the side of the main unit.
2. Align the connector of the impact device with the port and gently push it in until it clicks into place.
3. Assegureu-vos d'una connexió segura per a lectures precises.

Figure 5: Connecting the impact device to the main unit.

5.3 Configuració inicial

Upon first use or after a reset, you may need to configure basic settings.

• Idioma: The device supports multiple languages. Navigate to the settings menu to select your preferred language. (Note: The device supports English and other languages, including Spanish as per user queries).
• Data i hora: Set the correct date and time for accurate data logging.
• Apagat automàtic: Configure the auto power-off duration (1, 5, 10, 30 minutes, or disabled) to conserve battery life.

6. Instruccions de funcionament

6.1 Encès/Apagat

• Per encendre, premeu i manteniu premut Poder botó.
• Per apagar-lo, manteniu premut el botó Poder button again until the device shuts down.

6.2 Self-Calibration Function

For optimal accuracy, especially after prolonged storage or before critical measurements, perform a self-calibration using the provided standard hardness block.

1. Place the impact device firmly on the standard hardness block.
2. Initiate the calibration sequence through the device menu.
3. Perform five measurements on the standard block. The device will calculate the average and adjust its calibration based on the known hardness value of the block.

Figure 6: Self-calibration process.

6.3 Selecció de materials

The UT347A supports various material selections to ensure accurate hardness conversion. Select the appropriate material from the device menu before testing.

• Acer i acer fos
• Alloy tool steel
• Acer inoxidable
• Acer forjat
• Aliatge d'alumini fos
• Copper zinc alloy
• Copper tin alloy
• Gray cast iron
• Ferro colat nodular
• Pure copper

Figure 7: Material selection interface.

6.4 Impact Direction Selection

To obtain more accurate measurement results, the impact direction test settings can be adjusted to meet various scenarios. The device supports 0°, 45°, 90°, 135°, and 180° impact directions.

Figure 8: Available impact directions.

6.5 Realització d'una mesura

1. Ensure the impact device is properly connected and the device is powered on.
2. Select the correct material and impact direction from the menu.
3. Col·loqueu el dispositiu d'impacte fermament i perpendicularment sobre la superfície de prova.
4. Press the trigger button on the impact device to initiate the test. The hardness value will be displayed on the screen.
5. Repeat measurements as needed for statistical analysis.

Figura 9: Examples of hardness testing on different materials.

6.6 Modes de mesura

The UT347A offers various measurement modes:

• Statistical Mode: Displays average, maximum, and minimum values of a series of measurements.
• Multi-unit Mode: Permet viewing results in different hardness scales simultaneously.
• Line Chart/Histogram: Visual representation of measurement data for analysis.

Figure 10: Statistical and Multi-unit measurement modes.

6.7 Data Storage and Photo Function

The device can store up to 900 groups of measurement data and 900 BMP format pictures (640x480 pixels).

• Access the data storage menu to review mesures guardades.
• Use the built-in camera to capture images of the test area, which can be stored alongside measurement data.

Figura 11: Interfície d'emmagatzematge de dades.

Figure 12: Photo storage function.

6.8 Thermal Printing

The UT347A features a built-in thermal printer for immediate hard copies of your measurement results.

1. Ensure thermal paper is loaded correctly into the printer slot.
2. After completing measurements, select the print option from the device menu.
3. The device will print the current measurement data.

Figure 13: Real-time measurement printing.

6.9 Configuració d'alarma

Set upper and lower limits for your measurements. The device will provide a visual alarm using tri-color LEDs if the readings fall outside the set range.

• LED vermell: Indicates the measurement is below the lower limit.
• LED verd: Indicates the measurement is within the acceptable range.
• LED taronja: Indicates the measurement is above the upper limit.

Figure 14: Alarm setting and LED indications.

6.10 Connectivity (Bluetooth APP & PC Software)

The UT347A can connect to a mobile app via Bluetooth or to a PC via USB for advanced data analysis and management.

• APP Bluetooth: Download the official UNI-T app to your smartphone. Pair the device via Bluetooth to view, analyze, and export data.
• Programari de PC: Install the dedicated PC software. Connect the tester to your computer using the USB Type-C cable to synchronize data, generate reports, and perform further analysis.

Figure 15: PC software and mobile APP connectivity.

7. Manteniment

7.1 Neteja

• Regularly clean the device and impact device with a soft, dry cloth.
• For the impact device, use the provided cleaning brush to remove any debris from the impact body.
• No utilitzeu netejadors abrasius ni dissolvents.

7.2 Cura de la bateria

• Carregueu la bateria regularment, fins i tot si el dispositiu no s'utilitza amb freqüència, per mantenir-ne l'estat.
• Eviteu descarregar completament la bateria durant períodes prolongats.
• If the device will not be used for a long time, charge it to about 50% and store it in a cool, dry place.

7.3 Emmagatzematge

• Store the UT347A in its carrying case to protect it from dust, moisture, and physical damage.
• Keep the device in a dry environment with moderate temperatures.

8. Solució De Problemes

• El dispositiu no s'encén: Ensure the battery is charged. Connect to the charger and try again. If the issue persists, contact support.
• Lectures inexactes: Perform a self-calibration using the standard hardness block. Ensure the correct material and impact direction are selected. Check for proper contact between the impact device and the test surface.
• La impressora no funciona: Check if thermal paper is loaded correctly and if there's enough paper. Ensure the printer head is clean.
• Problemes de connexió Bluetooth: Ensure Bluetooth is enabled on both the tester and your mobile device. Try restarting both devices.
• El programari de l'ordinador no detecta el dispositiu: Ensure the USB cable is securely connected and the PC software drivers are installed correctly.

9. Especificacions

Figure 16: Detailed specifications of the UT347A Leeb Hardness Tester.

10. Consells d'usuari

• Configuració d'idioma: The device supports multiple languages. If you prefer Spanish, navigate to the system settings menu to change the display language.
• Measuring Thin Materials: While the UT347A is versatile, measuring very thin materials with Leeb hardness testers can be challenging. Ensure the material thickness meets the minimum requirements for the selected impact device to get accurate readings. Consult the specifications for your specific impact device for minimum thickness guidelines.
• Preparació de la superfície: Always ensure the test surface is clean, smooth, and free of scale, oil, or other contaminants for reliable results.

11. Informació del fabricant

UNI-T (Uni-Trend Technology (China) Co., Ltd.) is a leading test and measurement solutions provider. Committed to assuring the safety and well-being of the community, UNI-T strives to bring innovative and cost-effective products to customers worldwide. Every production step strictly follows AOL international standards, striving for excellence.