1. Introduction
The Mypin LM8-IRRD is an advanced weighing controller designed for precise measurement and control in various industrial applications. It features a clear digital display, multiple alarm outputs, and compatibility with 1-4 load cells, making it suitable for platform scales, batching systems, and automated filling processes. This manual provides essential information for the installation, operation, and maintenance of your LM8-IRRD controller.
2. Product Overview
The LM8-IRRD weighing controller is a compact and robust device featuring a dual digital display for Process Value (PV) and Set Value (SV), along with alarm indicators and unit displays. Its intuitive button interface allows for easy configuration and operation.
Front Panel Layout
- PV (Process Value): Top display, shows the current measured weight.
- SV (Set Value): Bottom display, shows the target weight or alarm threshold.
- AL1, AL2, AL3: Alarm indicator lights.
- T: Tare indicator.
- Kg, g: Weight unit indicators (Kilograms, grams).
- SET Button: Used to enter parameter setting mode and confirm selections.
- <</RST Button: Used for shifting digits during setting or resetting functions.
- Up Arrow Button: Used to increase values or navigate menu options.
- Down Arrow Button: Used to decrease values or navigate menu options.
3. Specifications
The following table details the technical specifications of the Mypin LM8-IRRD Weighing Controller:
| Parameter | Specification |
|---|---|
| Product Name | LM Series Automatic Weighing, Filling, and Batching Controller |
| Product Model | LM8 Series |
| Overall Dimensions | 48mm (H) x 96mm (W) x 80mm (D) |
| Panel Opening Size | 45mm x 91mm |
| Net Weight | ≤ 0.3 kg |
| Application Scope | Floor scales, cement, food packaging, chemical batching, filling, and other automated control |
| Main Function | Display weighing value and control it |
| Input | mV signal, can connect 1-4 load cells |
| Output | 2 RELAY relay outputs |
| Response Speed | 10 times per second |
| Auxiliary Power | 5V DC |
| Power Supply | 110/220V AC |
| Total Machine Power Consumption | < 3W |
| Display Weighing Range | -1999 to 9999 |
4. Setup
4.1 Installation
The LM8-IRRD controller is designed for panel mounting. Ensure the mounting panel has an opening of 45mm x 91mm. Insert the controller into the opening and secure it using the provided mounting clips on the sides.
4.2 Wiring
Proper wiring is crucial for the safe and correct operation of the weighing controller. Refer to the wiring diagram typically found on the top label of the device or in a dedicated wiring manual. Ensure all connections are secure and comply with local electrical codes.
- Power Supply: Connect the controller to a 110V or 220V AC power source as indicated on the device.
- Load Cell Input: The controller accepts mV signals and can connect 1 to 4 load cells. Ensure correct polarity and wiring configuration for your specific load cells.
- Relay Outputs: The controller provides 2 RELAY relay outputs for control purposes. Connect these to your external control devices (e.g., valves, motors) according to your application's requirements.
- 4-20mA Output: The LM8-IRRD model includes a 4-20mA analog output. Connect this output to compatible devices for analog signal transmission, such as PLCs or data acquisition systems.
Warning: Incorrect wiring can damage the device and pose electrical hazards. If you are unsure, consult a qualified electrician or technician.
5. Operating Instructions
5.1 Basic Operation
- Power On: After ensuring all wiring is correct, apply power to the controller. The display will light up, showing the current Process Value (PV) and Set Value (SV).
- Weighing: Place the item on the connected scale. The PV display will show the measured weight.
- Tare Function: To zero out the weight of a container, press the appropriate button (often indicated by 'T' or a similar symbol, or a combination with 'RST' if not a dedicated button) while the container is on the scale. The PV display should reset to zero.
5.2 Setting Parameters (Set Value, Alarms)
The 'SET' button is typically used to enter and navigate the parameter setting menu. The 'Up' and 'Down' arrow buttons adjust values, and the '<</RST' button can be used to shift digits or confirm settings.
- Enter Setting Mode: Press and hold the 'SET' button for a few seconds until the display changes, indicating entry into the parameter setting mode.
- Navigate Parameters: Use the 'SET' button to cycle through different parameters (e.g., SV1, SV2 for set points, alarm thresholds, unit selection, calibration settings).
- Adjust Values: When a desired parameter is displayed, use the 'Up' and 'Down' arrow buttons to adjust its value. Use the '<</RST' button to move the cursor between digits for precise input.
- Save Settings: After adjusting a parameter, press 'SET' again to move to the next parameter or to save and exit the setting mode (often by holding 'SET' or waiting for a timeout).
5.3 Calibration
Calibration is essential for accurate weighing. The specific calibration procedure will vary but generally involves:
- Entering calibration mode (usually a specific key combination or menu option).
- Zero-point calibration (with no load on the scale).
- Span calibration (using a known reference weight).
- Exiting and saving calibration settings.
Refer to the detailed calibration instructions provided with your specific model or consult the manufacturer's technical support for precise steps.
6. Maintenance
- Cleaning: Keep the controller's front panel clean using a soft, dry cloth. Avoid abrasive cleaners or solvents that could damage the display or casing.
- Environmental Conditions: Ensure the controller operates within its specified environmental conditions (temperature, humidity) to prevent malfunction.
- Connections: Periodically check all wiring connections for tightness and signs of corrosion or damage.
- Recalibration: Recalibrate the weighing controller periodically or if you suspect inaccuracies, especially after significant environmental changes or prolonged use.
7. Troubleshooting
This section provides basic troubleshooting steps for common issues. For more complex problems, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power, incorrect wiring, faulty power supply. | Check power connections, ensure correct voltage, test power supply. |
| Inaccurate weight readings | Needs calibration, faulty load cell, environmental interference. | Perform calibration, check load cell wiring and function, minimize vibrations or drafts. |
| Alarms not triggering | Set values incorrect, alarm output wiring issue, alarm function disabled. | Verify SV settings, check relay output connections, ensure alarm function is enabled in parameters. |
| Buttons unresponsive | Keypad malfunction, device frozen. | Try power cycling the device. If issue persists, contact support. |
8. User Tips
- Always ensure the load cell is properly installed and secured to the platform for stable readings.
- Regularly check the 4-20mA output signal with a multimeter to ensure it is functioning correctly, especially if integrating with other control systems.
- Keep a record of your calibration dates and any adjustments made to parameters for future reference.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your vendor. Keep your purchase receipt as proof of purchase.
