1. Introduction
The SINOTIMER MT-S is a versatile household digital PID temperature controller designed for precise temperature management in both heating and cooling applications. It features a clear dual-line, three-digit display and supports various thermocouple inputs, offering both relay and voltage impulse outputs for flexible integration into different systems.
Figure 1: Front view of the MT-S Digital PID Temperature Controller.
2. Features
- Wide Power Supply: AC100-240V 50/60HZ compatibility.
- Broad Temperature Range: -50 ~ +999 ℃/°F setting range.
- Multiple Thermocouple Inputs: Supports K, J, E, N type thermocouples, selectable by user.
- Dual Control Modes: PID (Proportional-Integral-Derivative) and ON/OFF control.
- Dual Output Methods: Relay contacts (3A @250VAC) or Voltage impulse output (12VDC for external SSR).
- Clear Display: Two-line, three-digit display for Process Value (PV) and Set Value (SV) in Celsius or Fahrenheit.
- High Precision: Control precision of ± 0.5%FS.
- Alarm Functionality: One alarm with 6 modes (high deviation, low deviation, process value alarm).
- Compact Design: Panel size 48 x 48mm (MT-S type).
3. Product Overview
3.1 Panel Functions
The front panel of the MT-S controller features a clear display and intuitive buttons for operation:
- PV (Process Value): Displays the measured temperature or various parameter symbols.
- SV (Set Value): Displays the desired set temperature or various parameter set values.
- OUT Indicator: Illuminates when the control output is active.
- AT Indicator: Illuminates when PID auto-tuning is active.
- AL1 Indicator: Illuminates when Alarm 1 is triggered.
- ▲ (Up Arrow): Increases numerical values during setting.
- ▼ (Down Arrow): Decreases numerical values during setting.
- ◀ (Shift Key): Moves the cursor or shifts digits during setting.
- MODE Button: Used for calling up parameters and registering set values.
Figure 2: Overview of MT series models and output types.
4. Installation
4.1 Dimensions and Mounting
The MT-S model has a panel size of 48 x 48mm. The required installation hole size for mounting is 45 x 45mm.
Figure 3: Panel dimensions and installation hole sizes for MT series controllers.
4.2 Wiring Connections
Proper wiring is crucial for the safe and correct operation of the temperature controller. Refer to the wiring diagram on the back of the unit and the detailed output/input method diagram below.
Figure 4: Rear view with wiring terminals.
Output Methods:
- Relay Output: Directly connected to the heat pipe or an AC contactor. The relay contacts are rated at 3A / 250VAC.
- Solid State Output (SSR): Connected to a Solid State Relay. The voltage impulse output is 12VDC, designed to control an external AC solid state relay.
Input Methods:
The controller accepts thermocouple inputs with index numbers K, J, E, or N. Ensure the correct thermocouple type is selected on the panel to match your sensor.
Figure 5: Output and Input Method Diagram.
WARNING: All wiring should be performed by a qualified electrician. Ensure power is disconnected before making any connections to prevent electric shock or damage to the unit.
5. Operation
5.1 Basic Temperature Setting
- Power on the device. The PV display will show the current measured temperature, and the SV display will show the set temperature.
- Press the MODE button briefly to enter the set value adjustment mode. The SV display will flash.
- Use the ▲ and ▼ buttons to adjust the desired temperature. Use the ◀ (Shift) key to move between digits for faster adjustment.
- Press the MODE button again to confirm the new set value and exit the adjustment mode.
5.2 Control Mode Selection (PID / ON/OFF)
The controller supports both PID and ON/OFF control modes. ON/OFF control is activated when the 'P' parameter (proportional band) is set to 0. For more advanced control and stability, use PID mode.
Refer to the full English manual (included in the package) for detailed instructions on accessing and adjusting advanced parameters, including PID settings and thermocouple type selection.
5.3 Alarm Settings
The controller features one alarm with six different modes: high deviation, low deviation, and process value alarm. These can be configured through the parameter settings. Consult the detailed manual for specific alarm parameter adjustments.
6. Maintenance
- Cleaning: Wipe the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Environmental Conditions: Ensure the controller operates within the specified ambient temperature (0-50°C) and humidity (30-85%RH) range. Avoid environments with corrosive gases.
- Inspection: Periodically check wiring connections for tightness and signs of wear or damage.
7. Troubleshooting
If you encounter issues with your SINOTIMER MT-S controller, consider the following basic troubleshooting steps:
- No Power: Check the power supply connections and ensure the voltage is within the AC100-240V range.
- Incorrect Temperature Reading: Verify that the correct thermocouple type is selected in the controller's settings and that the thermocouple is properly connected and not damaged.
- Output Not Activating: Check the OUT indicator. Ensure the set temperature (SV) is appropriately configured relative to the process value (PV) for heating or cooling. Verify output wiring.
- Unstable Temperature Control: If using PID mode, consider performing an auto-tune cycle. If using ON/OFF mode, ensure the hysteresis (deadband) is set appropriately.
- Alarm Not Functioning: Check alarm settings and ensure the alarm mode and set points are correctly configured.
For more complex issues, refer to the comprehensive English manual provided with your product or contact customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Power Supply | AC100-240V 50/60HZ |
| Temperature Setting Range | -50 ~ +999 ℃/°F |
| Input Thermocouple | K, J, E, N types (user selectable) |
| Control Mode | PID, ON/OFF (P=0) |
| Output Type | Relay contacts (3A @250VAC) or Voltage impulse (12VDC for external SSR) |
| Contact Capacity | 250V AC 3A (resistive load) |
| Display | Two lines, Three digits (PV/SV), Celsius/Fahrenheit |
| Display Resolution | 1°C/1°F |
| Control Precision | ± 0.5%FS |
| Alarm | One alarm, 6 modes (high/low deviation, process value) |
| Power Consumption | ≤10VA |
| Ambient Temperature | 0-50°C |
| Ambient Humidity | 30-85%RH (non-condensing) |
| Corrosive Gas | None |
| Item Size (MT-S) | 48 x 48mm |
| Installation Hole Size (MT-S) | 45 x 45mm |
| Material | Plastic |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation included with your purchase or contact the retailer/manufacturer directly. Keep your purchase receipt as proof of purchase.
