1. ບົດແນະນຳ
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. ຂໍ້ມູນຄວາມປອດໄພ
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.
- ຢ່າໃຫ້ອຸປະກອນຖືກອຸນຫະພູມສູງເກີນໄປ, ແສງແດດໂດຍກົງ ຫຼື ສະພາບແວດລ້ອມທີ່ກັດກ່ອນ.
- 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.
- ຢ່າພະຍາຍາມສ້ອມແປງ ຫຼືແກ້ໄຂອຸປະກອນ. ຕິດຕໍ່ພະນັກງານທີ່ມີຄຸນວຸດທິສໍາລັບການບໍລິການ.
3. ຜະລິດຕະພັນເກີນview ແລະອົງປະກອບ
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.
- ຮູ
- Clamp-on Temperature Probe Socket
- ຈໍ LCD
- ປຸ່ມຟັງຊັນ
- ປຸ່ມແລ່ນ/ຢຸດ
- ປຸ່ມສູນ
- R+/R- Refrigerant Type Selection Buttons
- ປຸ່ມຫຼຸດແສງ
- ປຸ່ມໜ່ວຍ
- ° C / ° F ປຸ່ມ
- ປຸ່ມເປີດປິດ
- ວາວຄວາມກົດດັນຕ່ໍາ
- Refrigerant Observation Window
- ວາວຄວາມກົດດັນສູງ
- 1/4 inch Low Pressure Inlet
- ວາວບັນເທົາ
- 1/4 inch High Pressure Inlet
- Refrigerant Inlet / Vacuum Pump Inlet
4. ຕັ້ງຄ່າ
Before first use, ensure the device is ready for operation.
4.1 ການເປີດເຄື່ອງເບື້ອງຕົ້ນ
- ກົດຄ້າງໄວ້ ປຸ່ມເປີດປິດ (11) to turn on the device.
- The LCD Display (3) will illuminate and show the initial readings.
4.2 ທໍ່ເຊື່ອມຕໍ່
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).
- ເຊື່ອມຕໍ່ທໍ່ຄວາມດັນສູງກັບທໍ່ 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).
- ໃຫ້ແນ່ໃຈວ່າການເຊື່ອມຕໍ່ທັງຫມົດແຫນ້ນແຫນ້ນເພື່ອປ້ອງກັນການຮົ່ວໄຫຼ.
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. ຄໍາແນະນໍາການດໍາເນີນງານ
This section details the various functions and how to operate the AUTOOL LM120.
5.1 ການສະແດງຜົນເກີນview
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 ການເລືອກຫົວ ໜ່ວຍ
To change pressure or temperature units:
- ກົດ ປຸ່ມໜ່ວຍ (9) to cycle through available pressure units (e.g., Kpa, Psi, Bar).
- ກົດ ° C / ° F ປຸ່ມ (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.
- ໃຊ້ R+/R- Refrigerant Type Selection Buttons (7) to scroll through the available refrigerant types.
- ຢືນຢັນການເລືອກຂອງທ່ານ.
5.4 ການວັດແທກຄວາມກົດດັນ
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 ການວັດແທກອຸນຫະພູມ
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.
- ກົດ ປຸ່ມຟັງຊັນ (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 ການວັດແທກສູນຍາກາດ
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 ໃນຈໍສະແດງຜົນ.
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. ບໍາລຸງຮັກສາ
Proper maintenance ensures the longevity and accuracy of your LM120 Digital Manifold Gauge.
- ທໍາຄວາມສະອາດ: ເຊັດອຸປະກອນດ້ວຍຜ້າອ່ອນໆ, ແຫ້ງ. ຢ່າໃຊ້ເຄື່ອງເຮັດຄວາມສະອາດຂັດຫຼືສານລະລາຍ.
- ການເກັບຮັກສາ: Store the gauge in its original case or a protective container in a cool, dry place away from direct sunlight and extreme temperatures.
- ການກວດກາທໍ່: Regularly inspect refrigerant hoses for cracks, wear, or damage. Replace damaged hoses immediately.
- ກວດສອບການເຊື່ອມຕໍ່: Ensure all connections and valves are clean and free of debris.
7. ການແກ້ໄຂບັນຫາ
If you encounter issues with your LM120, refer to the following common problems and solutions.
| ບັນຫາ | ສາເຫດທີ່ເປັນໄປໄດ້ | ການແກ້ໄຂ |
|---|---|---|
| ອຸປະກອນບໍ່ເປີດ | Low or depleted internal battery; power button not pressed correctly. | Ensure the device is charged or has sufficient power. Press and hold the Power Button firmly. |
| Inaccurate pressure/temperature readings | Incorrect refrigerant selected; loose hose connections; faulty probes; sensor calibration needed. | Verify the correct refrigerant type. Check all hose connections for tightness. Ensure temperature probes are clean and properly connected. Perform a zero calibration if available (using Zero Button). |
| ຈໍສະແດງຜົນແມ່ນມືດມົວ ຫຼືອ່ານບໍ່ໄດ້ | Backlight off; low battery. | Press the Dimming Button (8) to adjust backlight. Ensure the device is charged. |
| Leakage test shows false positive/negative | Improper connection; external temperature fluctuations; insufficient test duration. | Ensure all connections are absolutely leak-free. Conduct the test in a stable environment. Allow sufficient time for the test to complete. |
8. ຂໍ້ມູນຈໍາເພາະ
Detailed technical specifications for the AUTOOL LM120 Digital Manifold Gauge.
| ຄຸນສົມບັດ | ຂໍ້ມູນຈໍາເພາະ |
|---|---|
| ຜູ້ຜະລິດ | ອັດຕະໂນມັດ |
| ໝາຍເລກຕົວແບບ | LM120 |
| ວັດສະດຸ | High-strength Engineering Plastic |
| ຊ່ວງການທົດສອບຄວາມກົດດັນ | 0 Kpa – 6000 Kpa |
| ຄວາມລະອຽດການທົດສອບຄວາມກົດດັນ | 1 Kpa |
| ຄວາມຖືກຕ້ອງຂອງການທົດສອບຄວາມກົດດັນ | +/- 0.5 %(FS) + 5dgt |
| ຈຳກັດຄວາມກົດດັນເກີນ | 10000 Kpa (10 Mpa; 100 bar) |
| Number of Refrigerants in Database | 89 ປະເພດ |
| ມາດຕະຖານການໂຕ້ຕອບ | 1/4 ນິ້ວ |
| ຂະໜາດ (L x W x H) | 20.32 x 7.62 x 12.7 ຊມ (8 x 3 x 5 ນິ້ວ) |
| ນ້ຳໜັກ | 59.53 g (2.1 ອອນສ໌) |
| ສ່ວນປະກອບລວມ | 1 set of LM120 Digital Refrigeration Manifold Gauge |
| ຕ້ອງໃຊ້ແບັດເຕີຣີ | No (implies internal rechargeable or power source) |
| UPC | 733810026709, 733810026198 |
9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ
AUTOOL is committed to providing high-quality products and customer satisfaction.
- ການຮັບປະກັນສາມປີ: 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.
- ການຊ່ວຍເຫຼືອລູກຄ້າ: For any inquiries, technical assistance, or warranty claims, please contact AUTOOL customer support. You can expect a response within 24 hours.
