1. Product Overview
The MDPXTJOG STC-8000H is a versatile digital temperature controller designed for industrial applications. It provides precise temperature regulation, making it suitable for various heating and cooling systems. This manual provides detailed instructions for installation, operation, and maintenance of the STC-8000H controller.

Figure 1: STC-8000H Temperature Controller, angled view showing the display and control buttons.
2. Key Features
- Digital display for clear temperature readings.
- Precise temperature control for various applications.
- Supports multiple voltage inputs: AC 220V, 110V, AC/DC 24V, 12V.
- Equipped with a temperature sensor for accurate measurement.
- Designed for industrial usage.
3. Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | STC-8000H |
| Input Voltage Options | AC 220V, 110V, AC/DC 24V, 12V |
| Display Type | DIGITAL |
| Display Size | 2.0 - 3.9 Inches |
| Max Measuring Temperature | 120°C & Above |
| Item Weight | 1.76 ounces (approx. 50g) |
| Package Dimensions | 1.18 x 0.79 x 0.39 inches (approx. 3 x 2 x 1 cm) |
| Certification | CE |
| Usage | Industrial |
4. Installation and Wiring
Proper installation and wiring are crucial for the safe and correct operation of the STC-8000H controller. Refer to the wiring diagram below for connections.

Figure 2: Wiring Diagram for STC-8000H Temperature Controller.
Wiring Instructions:
- Terminals 1, 2, 3 (Compressor/Output): These terminals are for controlling the compressor or other output devices.
- Terminal 1: Compressor output.
- Terminal 2: Common point (Co-point).
- Terminal 3: Closed point.
- Terminals 4, 5 (Sensor): Connect the temperature sensor to these terminals.
- Terminal 4: Storage temperature sensor.
- Terminal 5: Sensor ground/return.
- Terminals 6, 7, 8 (Power Supply): Connect the main power supply to these terminals. Ensure the correct voltage (220VAC, 110VAC, 24VAC/DC, or 12VAC/DC) is applied as per your model.
- Terminal 6: Power supply input.
- Terminal 7: Power supply input.
- Terminal 8: Power supply input.
Important Notes for Wiring:
- Strictly distinguish the interface of relay, sensor, and power. Incorrect wiring can damage the unit or connected devices.
- Strictly distinguish the connection of sensor and power.
- The sensor down-lead and power wire should be kept at a proper distance to avoid interference.
- Ensure all connections are secure and insulated.
- Installation should be performed by qualified personnel.
5. Operating Instructions
The STC-8000H features a clear digital display and intuitive buttons for easy operation.

Figure 3: Front panel of STC-8000H showing display and control buttons.
Button Functions:
- SET Button: Used to enter parameter setting mode or confirm a setting.
- RST Button: Used to reset the controller or exit a setting without saving.
- ▲ (Up) Button: Used to increase values or navigate through menu options.
- ▼ (Down) Button: Used to decrease values or navigate through menu options.
Basic Operation:
- Power On: After correct wiring, apply power to the controller. The display will show the current temperature.
- View Set Temperature: Press the SET button briefly to view the current set temperature.
- Set Temperature:
- Press and hold the SET button for approximately 3 seconds until the display flashes.
- Use the ▲ (Up) or ▼ (Down) buttons to adjust the desired temperature value.
- Press the SET button again to confirm and save the new setting. The display will stop flashing and return to showing the current temperature.
- Reset: Press the RST button to reset the controller or clear any alarms.
For advanced parameter settings (e.g., differential, delay time), refer to the detailed programming guide that may be provided with the product packaging or contact technical support.
6. Maintenance
To ensure the longevity and optimal performance of your STC-8000H Temperature Controller, follow these maintenance guidelines:
- Cleaning: Regularly clean the exterior of the controller with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Ventilation: Ensure that the controller's ventilation slots (if any) are not obstructed to prevent overheating.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion.
- Environment: Operate the controller within its specified environmental conditions (temperature, humidity) to prevent damage.
- Sensor Check: Inspect the temperature sensor for any physical damage or signs of wear. Replace if necessary.
Caution:
Always disconnect power to the controller before performing any maintenance or inspection to avoid electric shock.
7. Troubleshooting
If you encounter issues with your STC-8000H Temperature Controller, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Controller does not power on. | No power supply; incorrect wiring; faulty power source. | Check power connections and voltage. Ensure wiring matches the diagram. Test power source. |
| Display shows "HHH" or "LLL". | Sensor error (open circuit or short circuit); temperature out of range. | Check sensor wiring for loose connections or damage. Replace sensor if faulty. Ensure temperature is within operating range. |
| Temperature reading is inaccurate. | Sensor placement; sensor calibration issue; interference. | Relocate sensor to a representative area. Check for strong electromagnetic interference. Consult advanced settings for calibration options if available. |
| Output (e.g., compressor) does not activate. | Incorrect set temperature; wiring error to output device; faulty relay. | Verify set temperature and differential. Check output wiring. Test the connected device independently. |
If the problem persists after attempting these solutions, please contact customer support.
8. Warranty Information
Specific warranty details for the MDPXTJOG STC-8000H Temperature Controller are typically provided with the product packaging or by the seller at the time of purchase. Please retain your proof of purchase for warranty claims.
Generally, products are warranted against defects in materials and workmanship for a specified period from the date of purchase. This warranty typically does not cover damage caused by improper installation, misuse, unauthorized modification, or natural disasters.
For detailed warranty terms and conditions, please refer to the documentation included with your product or contact the seller directly.
9. Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact MDPXTJOG customer support or your authorized reseller.
When contacting support, please be prepared to provide the following information:
- Product Model: STC-8000H
- Purchase Date
- Description of the issue
- Any troubleshooting steps already performed
Note: As specific contact information is not provided in this manual, please refer to the product packaging or the seller's website for the most up-to-date support contact details.