REES52 STC-3008 Digital Temperature Controller User Manual

1. Introduction

The REES52 STC-3008 is a microcomputer intelligent digital display temperature controller designed for precise temperature management. It features a dual display for monitoring two temperatures simultaneously and includes dual NTC sensors for accurate measurement. This thermostat supports both heating and cooling functions, making it versatile for various applications requiring adjustable temperature control.

Figure 1: Front view of the REES52 STC-3008 Digital Temperature Controller, showing dual digital displays and control buttons.

2. Key Features

• Dual Display: Microcomputer intelligent digital display thermostat with dual temperature readings.
• NTC Sensors: Equipped with two NTC sensors for convenient and accurate temperature measurement. The sensor line length is approximately 1 meter.
• Clear Digital Display: Large and clear digital display shows measuring temperatures with high accuracy.
• Durable Construction: Features an ABS flame-retardant plastic shell for enhanced safety and durability.
• Versatile Application: Suitable for automatic switching of refrigeration and heating devices in various settings.

3. What's in the Box

The package for your REES52 STC-3008 Digital Temperature Controller includes the following items:

• 1 x STC-3008 Temp Control Thermostat Sensor Unit

Figure 2: The STC-3008 unit shown with its attached NTC sensor cable.

4. Setup and Wiring

Proper wiring is crucial for the safe and correct operation of the STC-3008. Please follow the wiring diagrams carefully. Ensure all connections are secure before applying power.

4.1 Wiring Diagram

Figure 3: Wiring diagrams for the STC-3008, illustrating connections for both independent and shared load power supplies. Note the distinction between relay, sensor, and power wire connections.

Important Notes:

• Strictly distinguish the interface of the relay, sensor, and power supply. Incorrect wiring can damage the device or connected equipment.
• Ensure the sensor down-lead and power wire are kept at a proper distance to avoid interference.
• The power supply can be 110-220VAC, 12V, or 24V. Select the appropriate voltage for your model. The output relays are rated for 10A/220VAC.

5. Operating Instructions

This section details how to operate your STC-3008 temperature controller, including panel functions and setting parameters.

5.1 Panel Introduction

Figure 4: Front panel of the STC-3008, indicating the dual displays for temperature values, indicator lights, and adjustment buttons for setting start and stop temperatures for both groups.

The panel consists of two digital displays, indicator lights, and four buttons for setting parameters:

• First Group Temperature Detection Value (Display 1): Shows the current temperature measured by the first sensor.
• Second Group Temperature Detection Value (Display 2): Shows the current temperature measured by the second sensor.
• First Group Indicator Light (OUT 1): Illuminates when the first relay output is active.
• Second Group Indicator Light (OUT 2): Illuminates when the second relay output is active.
• First Group Start Temperature Adjustment Button (Up Arrow 1): Used to increase the start temperature for the first group.
• First Group Stop Temperature Adjustment Button (Down Arrow 1): Used to decrease the stop temperature for the first group.
• Second Group Start Temperature Adjustment Button (Up Arrow 2): Used to increase the start temperature for the second group.
• Second Group Stop Temperature Adjustment Button (Down Arrow 2): Used to decrease the stop temperature for the second group.

5.2 Setting Temperature Parameters

To set the desired start and stop temperatures for each control group:

1. To view current settings: Briefly press the respective Up or Down arrow button. The display will show the set value.
2. To adjust settings: Press and hold the respective Up or Down arrow button for approximately 3 seconds until the display flashes. Use the Up/Down arrows to adjust the value. Once the desired value is set, wait a few seconds for the display to stop flashing and save the setting automatically.
3. The controller operates with a 0.1 precision for temperature control.

6. Typical Applications

The REES52 STC-3008 Digital Temperature Controller is suitable for a wide range of applications where precise temperature control is essential. Its dual NTC sensors and adjustable heating/cooling functions make it ideal for:

Figure 5: Visual examples of the STC-3008's application in intensive livestock farming, greenhouses, and large storage coolers, highlighting its versatility in temperature-sensitive environments.

• Intensive Livestock Farming: Maintaining optimal temperatures for animal welfare and growth.
• Greenhouses: Controlling environmental conditions for plant cultivation.
• Large Storage Coolers: Ensuring consistent temperatures for perishable goods.
• Seafood Machines: Regulating temperatures for preservation.
• Cooling Water Machines: Managing water temperature in industrial or commercial systems.

The controller supports a wide setting temperature range of -55°C to 120°C (67°F to 248°F).

7. Specifications

8. Maintenance

To ensure the longevity and accurate performance of your STC-3008 Digital Temperature Controller, follow these general maintenance guidelines:

• Cleaning: Periodically wipe the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents, as these can damage the casing and display.
• Sensor Inspection: Regularly check the NTC sensors and their cables for any signs of damage, wear, or corrosion. Ensure they are securely connected and positioned correctly in the environment being monitored.
• Environmental Conditions: Operate the controller within its specified temperature and humidity ranges. Avoid exposing the unit to excessive moisture, dust, or direct sunlight.
• Power Supply: Ensure the power supply is stable and within the specified voltage range for your model to prevent electrical damage.

9. Troubleshooting

If you encounter issues with your STC-3008, refer to the following common troubleshooting steps:

• No Display/Power:
  • Check the power supply connection.
  • Verify that the power source is active and providing the correct voltage (110-220VAC, 12V, or 24V depending on model).
  • Inspect the power cable for damage.
• Inaccurate Temperature Readings:
  • Ensure the NTC sensors are properly connected to the unit.
  • Check the sensor cables for any cuts, pinches, or damage.
  • Verify that the sensors are placed correctly in the environment to be measured and are not exposed to external heat sources or drafts that could affect readings.
  • Compare readings with a known accurate thermometer to confirm deviation.
• Output Not Activating (Heating/Cooling Device Not Turning On/Off):
  • Confirm that the wiring to the heating/cooling device is correct and secure, especially the relay output connections.
  • Check the set start and stop temperatures to ensure they are configured correctly for your desired operation (e.g., for heating, start temp < stop temp; for cooling, start temp > stop temp).
  • Verify that the current measured temperature is within the range that should trigger the output.
  • Ensure the load connected to the relay does not exceed the 10A/220VAC rating.
• Display Error Codes:
  • If an error code appears, consult the manufacturer's specific error code list (if available) or contact support. Common errors might indicate sensor disconnection or malfunction.

If these steps do not resolve the issue, please contact customer support.

10. Warranty and Support

Warranty Information:

For warranty details and claims, please contact the manufacturer directly. The warranty description states "Contact Manufacturer".

Customer Support:

For technical assistance, inquiries, or support, you may contact the importer or manufacturer:

• Importer Contact: Bytesware Electronics, Bangalore-35, IN. Email: sales@xcluma.com
• Manufacturer: IMPORTED, REES52
• Packer: Electrobot Pvt Ltd

When contacting support, please have your product model (STC-3008) and any relevant purchase information ready.