Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the Selec TC303A Digital Temperature Controller. Please read this manual thoroughly before using the device to ensure safe and efficient operation.
The Selec TC303A is a high-performance digital temperature controller featuring a single 3-digit, 7-segment LED display. It supports various thermocouple (TC) and RTD inputs, offering both PID and ON/OFF control modes. Key features include a relay ON status indicator, three front panel control buttons for easy operation, and selectable Celsius/Fahrenheit temperature units.
Product Overview
Image: Front view of the Selec TC303A Digital Temperature Controller. The device features a black casing with an orange bezel. The front panel displays "Selec" and "TC303" in white text, with a red 3-digit LED display showing "303". Below the display are three orange control buttons: a square button on the left and two triangular buttons on the right.
The Selec TC303A is designed for precise temperature regulation in various industrial and scientific applications. Its compact design and user-friendly interface make it suitable for a wide range of control tasks.
Setup and Installation
Proper installation is crucial for the optimal performance and longevity of the TC303A controller. Ensure all power is disconnected before proceeding with installation.
Mounting
The controller is designed for panel mounting. Ensure adequate space for ventilation and access to wiring terminals. The protection level is IP66 for the front panel, indicating protection against dust and powerful water jets.
Wiring
Connect the power supply, sensor input, and control output according to the wiring diagram provided with the product packaging. The supply voltage range is 85 to 270V AC/DC (50/60Hz).
- Power Supply: Connect to the specified AC/DC voltage source.
- Sensor Input: Connect your chosen TC (J, K, T, R, S type) or RTD (Pt100) sensor to the designated terminals. Ensure correct polarity for thermocouples.
- Control Output: Connect the relay or SSR drive output to your heating/cooling element or other controlled device.
Refer to the detailed wiring diagram included with your product for specific terminal assignments.
Operating Instructions
The TC303A features a single display and three front panel buttons for configuration and operation.
Power On
Once wired correctly, apply power. The display will illuminate, showing the current process value (PV).
Setting the Setpoint
- Press the SET button (typically the square button) to enter setpoint adjustment mode.
- Use the UP and DOWN buttons (triangular buttons) to adjust the desired temperature setpoint.
- Press the SET button again to confirm and save the setpoint.
Control Modes (PID / ON/OFF)
The controller supports both PID and ON/OFF control. The specific method for selecting or configuring these modes will be detailed in the full product manual. Generally, this involves accessing a parameter menu using a combination of button presses.
Temperature Unit Selection (C / F)
The unit of temperature (Celsius or Fahrenheit) can be selected. This setting is typically found within the configuration menu. Refer to the full manual for instructions on how to access and change this parameter.
Maintenance
The Selec TC303A is designed for reliable operation with minimal maintenance. Regular checks can help ensure continued performance.
- Cleaning: Keep the front panel clean using a soft, dry cloth. Avoid abrasive cleaners or solvents.
- Connections: Periodically check all wiring connections for tightness and signs of corrosion.
- Environment: Ensure the operating environment remains within the specified temperature and humidity ranges (0°C to 50°C, 95% RH non-condensing).
Troubleshooting
This section addresses common issues you might encounter with the TC303A controller.
- No Display:
- Check power supply connections.
- Verify the supply voltage is within the 85-270V AC/DC range.
- Incorrect Temperature Reading:
- Ensure the sensor type configured in the controller matches the connected sensor (TC or RTD).
- Check sensor wiring for correct polarity and secure connections.
- Inspect the sensor for damage.
- Control Output Not Activating:
- Verify the setpoint is correctly configured.
- Check the control mode (PID/ON/OFF) and its parameters.
- Ensure the relay/SSR drive output is correctly wired to the controlled device.
- Check the LED status indicator for relay ON status.
For more complex issues, consult the comprehensive product manual or contact technical support.
Specifications
| Parameter | Value |
|---|---|
| Model | TC303A |
| Display | Single 3-digit, 7-segment LED |
| Control Type | PID, ON/OFF Control |
| Input Types | TC (J, K, T, R, S), RTD (Pt100) |
| Control Output | Relay or SSR Drive |
| Supply Voltage | 85 to 270V AC/DC (50/60Hz) |
| Sampling Time | 250 ms |
| Operating Temperature | 0°C to 50°C (32°F to 122°F) |
| Storage Temperature | -20°C to 75°C (-4°F to 167°F) |
| Humidity | 95% RH (non-condensing) |
| Protection Level | IP66 (Front Panel) |
| Pt100 Range | -150°C to 850°C, Accuracy: 0.1% of F.S. ±1°C, Resolution: 1°C |
| J Type Range | -199°C to 750°C, Accuracy: 0.25% of F.S. ±1°C, Resolution: 1°C |
| K Type Range | -199°C to 999°C, Accuracy: 0.25% of F.S. ±1°C, Resolution: 1°C |
| T Type Range | -199°C to 400°C, Accuracy: 0.25% of F.S. ±1°C, Resolution: 1°C |
| R & S Type Range | 0°C to 999°C, Accuracy: 0.5% of F.S. ±2°C, Resolution: 1°C |
Warranty and Support
For warranty information and technical support, please refer to the documentation included with your purchase or contact Ace Instruments, the manufacturer, directly. Keep your purchase receipt for warranty claims.
