UNI-T UT347A Leeb Hardness Tester

1. Úvod

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. Bezpečnostní informace

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.
• Nepokoušejte se přístroj rozebírat ani upravovat. Veškerý servis svěřte kvalifikovanému personálu.
• Keep the instrument away from water, dust, and extreme temperatures.
• Používejte pouze určený nabíjecí kabel a napájecí adaptér.
• Avoid direct impact on sensitive electronic components or fragile materials.

3. Obsah balení

Po vybalení ověřte, zda jsou všechny položky přítomny a v dobrém stavu:

• UT347A Leeb Hardness Tester Main Unit
• Impact Device (D-type standard)
• Standard Hardness Block
• Kabel USB typu C
• Power Adapter (DC5V 2A)
• Čisticí kartáč
• Uživatelská příručka
• Přepravní pouzdro

4. Konec produktuview

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

4.1 Klíčové vlastnosti

• Zobrazit: 2.8-inch 320x240 graphic dot matrix color TFT screen with adjustable backlight.
• Stupnice tvrdosti: Supports HL, HB, HRC, HRB, HV, HS.
• Nárazová zařízení: Compatible with 7 different impact devices (automatic identification without calibration).
• Režimy měření: Statistical, Multi-unit, Line chart, Histogram.
• Úložiště dat: 900 groups of data storage and 900 groups of pictures storage (640x480 pixels BMP format).
• Konektivita: Mobile phone Bluetooth APP and PC software for data analysis and synchronization.
• Tisk: Built-in thermal printer for real-time measurement printing (uses 57mm width thermal printing paper).
• Indikátory: Tri-color LED indication (red, yellow, green) for alarm prompts.
• Další vlastnosti: 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. Nastavení

5.1 Nabíjení baterie

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. Zapojte napájecí adaptér do vhodné zásuvky.
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 Connecting the Impact Device

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. Pro přesné odečty zajistěte bezpečné připojení.

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

5.3 Počáteční nastavení

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

• Jazyk: 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).
• Datum a čas: Set the correct date and time for accurate data logging.
• Automatické vypnutí: Configure the auto power-off duration (1, 5, 10, 30 minutes, or disabled) to conserve battery life.

6. Návod k obsluze

6.1 Zapnutí/vypnutí

• Pro zapnutí stiskněte a podržte Moc tlačítko.
• Chcete-li přístroj vypnout, stiskněte a podržte tlačítko Moc tlačítko znovu, dokud se zařízení nevypne.

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 Výběr materiálu

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

• Ocel a ocelolitina
• Alloy tool steel
• Nerez
• Kovaná ocel
• Litá hliníková slitina
• Copper zinc alloy
• Copper tin alloy
• Gray cast iron
• Tvárná litina
• 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 Provedení měření

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. Place the impact device firmly and perpendicularly on the test surface.
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.

Obrázek 9: Přamples of hardness testing on different materials.

6.6 Režimy měření

The UT347A offers various measurement modes:

• Statistical Mode: Displays average, maximum, and minimum values of a series of measurements.
• Multi-unit Mode: Umožňuje 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 uložená měření.
• Use the built-in camera to capture images of the test area, which can be stored alongside measurement data.

Figure 11: Data storage interface.

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 Nastavení alarmu

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.

• Červená LED: Indicates the measurement is below the lower limit.
• Zelená LED: Indicates the measurement is within the acceptable range.
• Oranžová LED: 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.

• Bluetooth APP: Download the official UNI-T app to your smartphone. Pair the device via Bluetooth to view, analyze, and export data.
• PC Software: 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. Údržba

7.1 Čištění

• 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.
• Nepoužívejte abrazivní čisticí prostředky nebo rozpouštědla.

7.2 Péče o baterii

• Pravidelně nabíjejte baterii, i když zařízení nepoužíváte často, abyste zachovali její stav.
• Vyhněte se delšímu úplnému vybíjení baterie.
• Pokud zařízení nebudete delší dobu používat, nabijte jej přibližně na 50 % a uložte jej na chladném a suchém místě.

7.3 Skladování

• 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. Řešení problémů

• Zařízení se nezapne: Ensure the battery is charged. Connect to the charger and try again. If the issue persists, contact support.
• Nepřesné údaje: 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.
• Tiskárna nefunguje: Check if thermal paper is loaded correctly and if there's enough paper. Ensure the printer head is clean.
• Problémy s připojením Bluetooth: Ensure Bluetooth is enabled on both the tester and your mobile device. Try restarting both devices.
• Software počítače nerozpoznává zařízení: Ensure the USB cable is securely connected and the PC software drivers are installed correctly.

9. Specifikace

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

10. Uživatelské tipy

• Nastavení jazyka: 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.
• Příprava povrchu: Always ensure the test surface is clean, smooth, and free of scale, oil, or other contaminants for reliable results.

11. Informace výrobce

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.