1. Introduction and Overview
The Dmyond STC-3000 is a versatile microcomputer temperature controller designed for precise temperature management in various applications. It features both cooling and heating control modes, temperature calibration, refrigerating control output delay protection, and an alarm function for temperature excursions or sensor errors.
2. Safety Regulations
Danger:
- Strictly distinguish the sensor down-lead, power wire, and output relay interface from one another. Prohibit wrong connections or overloading the relay.
- Prohibit connecting the wire terminals without electricity cut-off.
Warning:
- Prohibit using the machine under environments of excessive dampness, high temperature, strong electromagnetism interference, or strong corrosion.
Notice:
- The power supply should conform to the voltage value indicated in this instruction manual.
- To avoid interference, the sensor down-lead and power wire should be kept at a proper distance from each other.
3. Product Features
- Dual Mode Control: Easily switch between cooling and heating modes.
- Precise Temperature Control: Set desired temperature and difference values for accurate control.
- Temperature Calibration: Adjust for sensor inaccuracies.
- Refrigerating Delay Protection: Protects compressor from frequent starts.
- Alarm Functions: Alerts for temperature exceeding limits or sensor errors.
- Effective Heat Dissipation: Designed with a cooling grid for efficient operation.
- Dual Display: Shows both Celsius (°C) and Fahrenheit (°F) readings.
- High-Quality Components: Features precision components, sealed terminal blocks, anti-breakdown capacitors, clear digital display, and durable buttons.
4. Specifications
| Parameter | Value |
|---|---|
| Product Name | Microcomputer Temperature Controller |
| Product Number | STC-3000 |
| Supply Voltage | DC 12V, DC 24V, or AC 110V/220V (+10%, 50/60Hz) (three voltage options) |
| Temperature Measuring Range | -50°C ~ 99°C |
| Measurement Error | ± 0.5°C |
| Temperature Control Accuracy | 1°C |
| Display Accuracy | 0.1°C |
| Sensor Length | 1 meter (includes probe) |
| Front Panel Size | 75(L) x 34.5(W) mm |
| Mounting Size | 71(L) x 29(W) mm |
| Product Size | 75(L) x 34.5(W) x 85(D) mm |
| Sensor Error Delay | 1 minute |
| Power Consumption | <3W |
| Sensor Type | NTC sensor (IPC) |
| Relay Contact Capacity | Cool: 10A/220VAC; Heat: 10A/220VAC |
| Ambient Temperature | 0-60°C |
| Storage Temperature | -30-75°C |
| Relative Humidity | 20-85% (No condensate) |
| Applicable Scenarios | Various sensor control boxes, water heaters, freezer cabinets, fans (not limited to these devices) |
For more detailed technical information, please refer to the official user manual PDF: STC-3000 User Manual (PDF).
5. Setup and Wiring
Proper wiring is crucial for the safe and correct operation of the STC-3000 controller. Please follow the diagram carefully and ensure all connections are secure and made with the power supply disconnected.
Wiring Notes:
- Strictly distinguish the sensor down-lead, power wire, and output relay interface from one another.
- Strictly distinguish the connection of the sensor and power.
- The sensor down-lead and power wire should be kept a proper distance apart to avoid interference.
6. Operating Instructions
6.1. Power On/Off
- To Turn Off: Under normal working status, press and hold the power button (
) for 3 seconds. - To Turn On: Under 'off' status, press and hold the power button () for 3 seconds.
6.2. Viewing Parameters
- When the controller is working normally, press and release the '▲' button once to display the temperature set value.
- Press and immediately release the '▼' button once to display the temperature difference set value.
- The display will return to the normal temperature display state after 2 seconds.
6.3. Setting Parameters (Menu Instruction)
To enter the parameter modification mode:
- When the controller is working normally, press and hold the 'S' button for more than 3 seconds.
- The 'Set' indicator light will turn on, and the digital display will show the code "F1" (first menu item).
- Use the '▲' or '▼' buttons to scroll through menu items (F1, F2, F3, F4, F5). Press 'S' to select a menu item.
- To adjust a parameter's value: While viewing the parameter (e.g., F1), press and hold the 'S' button and simultaneously press '▲' or '▼'.
- The '▲' or '▼' buttons can then be used to quickly adjust the parameter value up or down.
- After completing adjustments, press and release the power button () to save the modifications and return to the normal temperature display state.
- Note: If there is no key operation for 5 seconds, the parameter modification will not be saved, and the controller will return to the normal display state.
Parameter Menu:
| Code | Function | Set Range | Default |
|---|---|---|---|
| F1 | Temperature set value | -50°C ~ 99°C | 10°C |
| F2 | Difference set value | 1°C ~ 10°C | 3°C |
| F3 | Compressor delay time | 1 ~ 10 minutes | 3 minutes |
| F4 | Temperature calibration value | -10°C ~ 10°C | 0°C |
| F5 | Fahrenheit/Celsius switching | Set range | 0/1 |
6.4. Heating and Cooling Mode Setting Example
Example: Control Water Heater (Heating to 65°C to stop, temperature drops back to 50°C and starts heating again).
- Cooling Mode: Ensure Starting Temperature > Stop Temperature.
- Step 1 (Set Starting Temperature): Press and hold the '▲' button for 3 seconds until the Start Temperature value flashes. Use '▲' or '▼' to set the Starting Temperature to 32°C (for example).
- Step 2 (Set Stop Temperature): Press and hold the '▼' button for 3 seconds until the Stop Temperature value flashes. Use '▲' or '▼' to set the Stop Temperature to 22°C (for example).
6.5. Indicator Light Status
- Cool Indicator Light:
- On: Refrigeration starts.
- Off: Refrigeration stops.
- Flash: Compressor delay protection is active.
- Heat Indicator Light:
- On: Heating starts.
- Off: Heating stops.
- Set Indicator Light:
- On: Parameter setting status is active.
6.6. Working Mode Logic
- Refrigerating Operation: The controller starts refrigerating (Cool indicator light on) when the measured temperature is ≥ (temperature set value + difference value). The refrigerating relay connects. The 'Cool' indicator light flashes during compressor delay protection. Refrigerating stops (Cool indicator light off) when the measured temperature is ≤ temperature set value.
- Heating Operation: The system starts heating (Heat indicator light on) when the measured temperature is ≤ (temperature set value - difference value). The heat relay connects. Heating stops (Heat indicator light off) when the measured temperature is ≥ temperature set value.
7. Troubleshooting
7.1. Error Descriptions
- Sensor Error (Display "EE"):
If the sensor has an open circuit or short circuit, the controller activates the sensor error alarm mode. All running functions are stopped, the buzzer alarms, and the display shows "EE". Press any key to cancel the alarm sound. The system will return to normal temperature display once the error is cleared.
- Temperature Exceeds Measuring Range (Display "HH"):
If the measured temperature exceeds the controller's measuring range, the error alarm function activates. All running functions are stopped, the buzzer alarms, and the display shows "HH". Press any key to cancel the alarm sound. The system will return to normal temperature display once the error is cleared.
7.2. Repair System Data
Upon powering on the machine, first verify that the parameter settings are normal. If an error is detected (displaying "ER"), pressing any key will restore the default parameter settings, allowing the unit to operate normally. It is recommended to reset all parameters at this time to ensure optimal performance.
8. User Tips
No specific user tips were available from reviews or Q&A for this product at this time. Always ensure proper wiring and follow safety guidelines for best results.
9. Maintenance
To ensure the longevity and accurate performance of your STC-3000 controller, keep the unit clean and free from dust. Avoid exposing it to extreme moisture, high temperatures, strong electromagnetic fields, or corrosive substances. Regularly check wiring connections for tightness and signs of wear. No specific routine maintenance beyond general cleaning and inspection is typically required.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact the seller directly. Keep your purchase records for any warranty claims.
