Manual de utilizare pentru manometrul digital AUTOOL LM120

1. Introducere

The AUTOOL LM120 Digital Manifold Gauge is an intelligent electronic instrument designed to assist in the installation, testing, and maintenance of refrigeration equipment. This includes systems such as air conditioners, refrigerators, and cold storage units. It provides precise measurements for pressure, temperature, and vacuum, along with advanced diagnostic capabilities.

Image 1.1: AUTOOL LM120 Digital Manifold Gauge in use, connected to an automotive air conditioning system.

2. Informații de siguranță

Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in injury or damage to the equipment.

• Always wear appropriate personal protective equipment (PPE), including safety glasses and gloves, when working with refrigeration systems and refrigerants.
• Ensure adequate ventilation in the work area to prevent the accumulation of refrigerant gases.
• Do not expose the device to extreme temperatures, direct sunlight, or corrosive environments.
• Handle refrigerant hoses and connections with care to prevent leaks and accidental discharge.
• Refer to local regulations and industry standards for the safe handling, recovery, and disposal of refrigerants.
• Do not attempt to repair or modify the device. Contact qualified personnel for service.

3. Produs terminatview și Componente

The LM120 Digital Manifold Gauge features a robust design with an intuitive interface. Familiarize yourself with the components shown below.

Image 3.1: Detailed diagram of the LM120 Digital Manifold Gauge components.

1. Cârlig
2. Clamp-on Temperature Probe Socket
3. Display LCD
4. Buton de funcție
5. Butonul Run/Stop
6. Buton zero
7. R+/R- Refrigerant Type Selection Buttons
8. Buton de reglare a luminii
9. Butonul de unitate
10. Butonul ° C / ° F
11. Buton de alimentare
12. Supapă de joasă presiune
13. Refrigerant Observation Window
14. Supapă de înaltă presiune
15. 1/4 inch Low Pressure Inlet
16. Supapa de suprasolicitare
17. 1/4 inch High Pressure Inlet
18. Refrigerant Inlet / Vacuum Pump Inlet

4. Configurare

Before first use, ensure the device is ready for operation.

4.1 Pornirea inițială

• Țineți apăsat butonul Buton de alimentare (11) to turn on the device.
• The LCD Display (3) will illuminate and show the initial readings.

4.2 Conectarea furtunurilor

Connect the appropriate refrigeration hoses to the inlets on the manifold gauge.

• Connect the low-pressure hose to the 1/4 inch Low Pressure Inlet (15).
• Conectați furtunul de înaltă presiune la 1/4 inch High Pressure Inlet (17).
• Connect the service hose (for vacuum pump or refrigerant tank) to the Refrigerant Inlet / Vacuum Pump Inlet (18).
• Asigurați-vă că toate conexiunile sunt strânse pentru a preveni scurgerile.

4.3 Connecting Temperature Probes (Optional)

For dual temperature measurement, connect compatible clamp-on temperature probes (not included) to the Clamp-on Temperature Probe Socket (2).

5. Instrucțiuni de utilizare

This section details the various functions and how to operate the AUTOOL LM120.

5.1 Afișare pesteview

The large LCD provides clear, real-time data for pressure, temperature, and other parameters.

Image 5.1: The smart digital display provides clear readings for various parameters.

5.2 Selectarea unității

To change pressure or temperature units:

• Apăsați tasta Butonul de unitate (9) to cycle through available pressure units (e.g., Kpa, Psi, Bar).
• Apăsați tasta Butonul ° C / ° F (10) to switch between Celsius and Fahrenheit temperature displays.

5.3 Refrigerant Type Setting

The device has a built-in database of 89 refrigerants. Select the correct refrigerant type for accurate calculations.

Image 5.2: Setting the refrigerant type on the LM120 display.

• Utilizați R+/R- Refrigerant Type Selection Buttons (7) to scroll through the available refrigerant types.
• Confirmați selecția.

5.4 Măsurarea presiunii

The LM120 measures both high and low pressures simultaneously.

• Ensure hoses are correctly connected to the high and low-pressure ports of the system.
• The display will show the current high and low pressure readings.

5.5 Măsurarea temperaturii

With optional clamp-on temperature probes, the device can measure dual temperatures.

Image 5.3: High/Low pressure temperature test display.

• Attach the temperature probes to the desired measurement points (e.g., suction line, liquid line).
• The display will show T1 and T2 temperature readings.

5.6 Evaporation Pressure & Temperature Test

This function measures the maximum pressure when the refrigerant changes from liquid to gas and the lowest temperature when the liquid becomes gaseous.

Image 5.4: Evaporation pressure and temperature test results on the display.

5.7 Condensing Pressure & Temperature Test

This function measures the minimum pressure when the refrigerant changes from gas to liquid and the maximum temperature when the gas changes to liquid.

Image 5.5: Condensing pressure and temperature test results on the display.

5.8 Pressure Leakage Test

The device can perform a pressure leakage test, recording leak time and speed.

Image 5.6: Pressure leakage test in progress, showing initial and current pressure values over time.

• Connect the gauge to the system to be tested.
• Apăsați tasta Buton de funcție (4) to navigate to the leakage test mode.
• Follow the on-screen prompts to start and monitor the test. The device calculates the pressure difference between the initial and second test pressures to determine if refrigerant is leaking.

5.9 Măsurarea vidului

The LM120 can measure the percentage of vacuum achieved in a system.

• Connect the vacuum pump to the Refrigerant Inlet / Vacuum Pump Inlet (18).
• Activate the vacuum pump and monitor the vacuum percentage pe ecran.

5.10 Superheat and Subcooling Calculation

Leveraging its integrated 89-type refrigerant database, the LM120 can automatically calculate superheat and subcooling temperatures.

Image 5.7: Built-in database of 89 refrigerant types for accurate calculations.

• Ensure the correct refrigerant type is selected (refer to Section 5.3).
• With pressure and temperature probes connected, the device will display calculated superheat and subcooling values.

6. Întreținere

Proper maintenance ensures the longevity and accuracy of your LM120 Digital Manifold Gauge.

• curatenie: Ștergeți dispozitivul cu o lavetă moale și uscată. Nu utilizați substanțe de curățare abrazive sau solvenți.
• Depozitare: Store the gauge in its original case or a protective container in a cool, dry place away from direct sunlight and extreme temperatures.
• Inspecția furtunului: Regularly inspect refrigerant hoses for cracks, wear, or damage. Replace damaged hoses immediately.
• Verificarea conexiunii: Ensure all connections and valves are clean and free of debris.

7. Depanare

If you encounter issues with your LM120, refer to the following common problems and solutions.

8. Specificații

Detailed technical specifications for the AUTOOL LM120 Digital Manifold Gauge.

9. Garanție și asistență

AUTOOL is committed to providing high-quality products and customer satisfaction.

• Garanție de trei ani: For damage caused by non-human factors, AUTOOL promises to resend parts free of charge within 3 years from the date of purchase.
• Permanent Maintenance: The product is covered by permanent maintenance support.
• Asistență clienți: For any inquiries, technical assistance, or warranty claims, please contact AUTOOL customer support. You can expect a response within 24 hours.