1. Introduction
This manual provides essential information for the safe and effective operation of your LDHJBNAC XMTG-8 Digital PID Temperature Controller. This device is designed for precise temperature control in various industrial applications, featuring advanced PID algorithms and ramp/soak capabilities. Please read this manual thoroughly before installation and operation.
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the device.
- Electrical Safety: Ensure all wiring is performed by qualified personnel and complies with local electrical codes. Disconnect power before making any connections or performing maintenance.
- Proper Installation: Install the controller in an environment free from excessive vibration, moisture, dust, corrosive gases, and extreme temperatures.
- Intended Use: Use the controller only for its intended purpose of temperature regulation. Do not use it for safety-critical applications without additional safety measures.
- Ventilation: Ensure adequate ventilation around the unit to prevent overheating.
3. Product Overview
The XMTG-8 series temperature controller offers highly accurate display and control, suitable for a wide range of industrial processes.
Figure 3.1: Front view of the XMTG-8 controller. This image shows the dual digital displays for Process Value (PV) and Set Value (SV), along with indicator lights for alarms (AL1, AL2), auto-tuning (AT), and output (OUT). The control buttons (SET, Up, Down, Left/Right) are located below the displays.
Key Features:
- Simplified operation process for setting defined values.
- Highly accurate digital display and control.
- Flush mounting design with screw terminals for secure installation.
- Supports various output types: Relay, SSR, 0-22mA, and SCR (depending on model variant).
- Ramp/Soak functionality for advanced temperature profiling.
Figure 3.2: Side view of the XMTG-8 controller, showing the compact design and ventilation slots.
4. Setup and Installation
4.1 Mounting
The XMTG-8 controller is designed for flush mounting. Ensure the panel cutout dimensions match the controller's specifications. Secure the controller using the provided mounting brackets and screw terminals.
4.2 Wiring
Refer to the wiring diagram on the side of the controller and the terminal block image for correct connections. Ensure all connections are secure and properly insulated.
Figure 4.1: Back view of the XMTG-8 controller, displaying the model number (e.g., XMTG-818P) and a detailed wiring diagram for power input, sensor input, and output connections.
Figure 4.2: Close-up view of the screw terminal block, showing numbered terminals for input, output, and power connections.
- Power Supply: Connect the AC power supply (AC100~242V) to terminals L and N as indicated.
- Sensor Input: Connect your temperature sensor (e.g., thermocouple, RTD) to the designated input terminals (e.g., 1, 2, 3, 4, 5). Refer to the diagram for specific sensor type connections.
- Output Connections: Connect your heating/cooling element or other controlled device to the output terminals (e.g., 6, 7, 8, 9, 10) according to your controller's output type (Relay, SSR, 0-22mA, SCR).
5. Operating Instructions
5.1 Basic Operation
Upon power-up, the controller will display the Process Value (PV) and Set Value (SV).
- Setting Temperature (SV): Press the SET button once. The SV display will flash. Use the Up and Down arrow buttons to adjust the desired temperature. Press SET again to confirm and exit.
- Parameter Access: Press and hold the SET button for several seconds to enter the parameter setting menu. Use the arrow buttons to navigate and adjust parameters.
5.2 PID Control and Auto-Tuning
The XMTG-8 utilizes PID (Proportional-Integral-Derivative) control for stable and accurate temperature regulation. For optimal performance, auto-tuning is recommended after initial setup or if the process characteristics change significantly.
- Auto-Tuning (AT): Refer to the specific parameter settings in the full product manual for initiating auto-tuning. During auto-tuning, the AT indicator light will illuminate, and the controller will cycle the output to determine optimal PID parameters.
5.3 Ramp/Soak Functionality
The XMTG-8 supports ramp/soak programming, allowing for complex temperature profiles with defined heating/cooling rates (ramps) and holding periods (soaks). Detailed programming steps for ramp/soak profiles are typically found within the advanced parameter settings of the controller.
5.4 Alarm Settings
The controller features one or two alarm outputs (AL1, AL2). Alarm parameters can be configured to activate based on deviations from the setpoint, absolute temperature limits, or other conditions. Adjust alarm types and values in the parameter menu.
6. Maintenance
Regular maintenance ensures the longevity and reliable operation of your temperature controller.
- Cleaning: Gently wipe the display and casing with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no liquids enter the unit.
- Inspection: Periodically check all wiring connections for tightness and signs of wear or damage. Inspect the mounting for security.
- Environmental Conditions: Verify that the operating environment remains within the specified temperature and humidity ranges.
7. Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/No power | No power supply; incorrect wiring; blown fuse. | Check power connections; verify wiring against diagram; check power source. |
| Inaccurate temperature reading | Sensor fault; incorrect sensor type setting; poor sensor connection. | Check sensor wiring; verify sensor type in parameters; replace sensor if faulty. |
| Output not activating | Incorrect output wiring; output parameter setting error; faulty output component. | Verify output wiring; check control parameters (e.g., heating/cooling mode, setpoint); test output component. |
| Temperature overshoots/undershoots | PID parameters not optimized. | Perform auto-tuning to optimize PID parameters. |
If problems persist after troubleshooting, contact customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Model Series | XMTG-8 |
| Display Size | 1.9 Inches & Under |
| Max Measuring Temperature | 120°C & Above |
| Output Types (Model Dependent) | Relay, SSR, 0-22mA, SCR |
| Mounting Type | Flush mounting |
| Package Dimensions | 1.18 x 0.79 x 0.39 inches |
| Item Weight | 10.6 ounces |
| Number of Pieces | 1 |
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your vendor. Keep your purchase receipt for warranty claims.
For further assistance, please visit the manufacturer's website or contact their customer service department.