1. Ro-ràdh
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. Fiosrachadh Sàbhailteachd
Leugh agus tuig a h-uile stiùireadh sàbhailteachd mus cleachd thu an inneal. Dh’ fhaodadh fàilligeadh ann a bhith a’ leantainn nan stiùiridhean seo dochann no milleadh a dhèanamh air an uidheamachd.
- 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.
- Na feuch ri an inneal a chàradh no atharrachadh. Cuir fios gu luchd-obrach teisteanasach airson seirbheis.
3. Toradh thallview agus Co-phàirtean
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.
- dubhan
- Clamp-on Temperature Probe Socket
- Taisbeanadh LCD
- Putan gnìomh
- Putan Ruith / Stad
- Putan Zero
- R+/R- Refrigerant Type Selection Buttons
- Putan lasachaidh
- Putan an Aonaid
- ° C / ° F Putan
- Putan Cumhachd
- Bhalbhaiche cuideam ìosal
- Refrigerant Observation Window
- Bhalbhaiche bruthadh àrd
- 1/4 inch Low Pressure Inlet
- Comhla faochaidh
- 1/4 inch High Pressure Inlet
- Refrigerant Inlet / Vacuum Pump Inlet
4. Suidhich
Before first use, ensure the device is ready for operation.
4.1 Cumhachd-Air Tòiseachaidh
- Brùth agus cùm an Putan Cumhachd (11) gus an inneal a thionndadh air.
- The LCD Display (3) will illuminate and show the initial readings.
4.2 Pìoban Ceangail
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).
- Ceangail am pìob àrd-bhruthadh ris an 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).
- Dèan cinnteach gu bheil a h-uile ceangal teann gus casg a chuir air aoidion.
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. Stiùireadh Obrachaidh
This section details the various functions and how to operate the AUTOOL LM120.
5.1 Taisbeanadh thairisview
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 Taghadh Aonad
To change pressure or temperature units:
- Brùth an Putan an Aonaid (9) to cycle through available pressure units (e.g., Kpa, Psi, Bar).
- Brùth an ° C / ° F Putan (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.
- Cleachd an R+/R- Refrigerant Type Selection Buttons (7) to scroll through the available refrigerant types.
- Dearbhaich an taghadh agad.
5.4 Tomhas Brùthadh
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 Tomhas Teothachd
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.
- Brùth an Putan gnìomh (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 Tomhas Vacuum
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 air an taisbeanadh.
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. Cumail suas
Proper maintenance ensures the longevity and accuracy of your LM120 Digital Manifold Gauge.
- Glanadh: Sguab an inneal le clò bog, tioram. Na cleachd innealan-glanaidh sgrìobach no fuasglaidhean.
- Stòradh: Store the gauge in its original case or a protective container in a cool, dry place away from direct sunlight and extreme temperatures.
- Sgrùdadh Hose: Regularly inspect refrigerant hoses for cracks, wear, or damage. Replace damaged hoses immediately.
- Sgrùdadh ceangail: Ensure all connections and valves are clean and free of debris.
7. A ’dèanamh trioblaid
If you encounter issues with your LM120, refer to the following common problems and solutions.
| Trioblaid | Adhbhar a dh’fhaodadh a bhith ann | Fuasgladh |
|---|---|---|
| Chan eil cumhachd aig an inneal | 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. |
| Leughaidhean cuideam/teòthachd mì-chruinn | 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). |
| Tha an taisbeanadh beag no neo-leughaidh | 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. Sònrachaidhean
Detailed technical specifications for the AUTOOL LM120 Digital Manifold Gauge.
| Feart | Sònrachadh |
|---|---|
| Dèanadair | AUTOOL |
| Modail Àireamh | LM120 |
| Stuth | High-strength Engineering Plastic |
| Raon Deuchainn Brùthaidh | 0 Kpa - 6000 Kpa |
| Fuasgladh Deuchainn Brùthaidh | 1 kpa |
| Cruinneas Deuchainn Brùthaidh | +/- 0.5 %(FS) + 5dgt |
| Crìoch Cus-luchdachaidh Brùthaidh | 10000 Kpa (10 Mpa; 100 bar) |
| Number of Refrigerants in Database | 89 seòrsa |
| Inbhe eadar-aghaidh | 1/4 òirleach |
| Meudan (L x W x H) | 20.32 x 7.62 x 12.7 cm (8 x 3 x 5 òirleach) |
| Cuideam | 59.53 g (2.1 unnsa) |
| Co-phàirtean air an toirt a-steach | 1 set of LM120 Digital Refrigeration Manifold Gauge |
| Bataraidhean a dhìth | No (implies internal rechargeable or power source) |
| UPC | 733810026709 |
9. Barantas agus Taic
AUTOOL is committed to providing high-quality products and customer satisfaction.
- Barantas trì-bliadhna: 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.
- Taic teachdaiche: For any inquiries, technical assistance, or warranty claims, please contact AUTOOL customer support. You can expect a response within 24 hours.