1. Introduction
The Ketotek KT3400 is a versatile digital controller designed for managing humidity and temperature. It supports various operating modes including humidification, dehumidification, heating, cooling, and alarm functions. This device is suitable for a wide range of applications such as incubation, breeding, greenhouses, and general household use where intelligent environmental control is required.
2. Important Safety Warnings
- Always inspect the plastic casing of the unit for any damage before use. Do not operate if damage is present.
- The maximum relay capacity is 16A. For resistance loads, ensure usage is less than 14A. For inductive loads, ensure usage is less than 2A.
- Do not use this unit in environments containing explosive gases, steam, or excessive dust.
- Keep the device out of reach of children and do not allow them to operate it.
- Do not attempt to disassemble or repair the device yourself. Refer to qualified personnel for service.
3. Product Overview
The KT3400 features a clear digital display and intuitive controls for easy operation. It includes a remote sensor for accurate environmental monitoring.
4. Specifications
| Feature | Specification |
|---|---|
| Model | KT3400 |
| Brand | KETOTEK |
| Power Supply | 100~250Vac 50/60Hz |
| Humidity Control Range | 20~95%RH |
| Temperature Control Range | -10°C~50°C (14°F~122°F) |
| Control Accuracy | ±5%RH / ±1°C (±2°F) |
| Output (EU/FR Plug) | Max 16A/230V |
| Output (UK Plug) | Max 13A/230V |
| Output (US Plug) | Max 15A/120V |
| Output (AU Plug) | Max 10A/240V |
| Sensor Cable Length | 1.37 meters (Note: Image indicates 137mm, text states 1.37M. Assuming 1.37M for practical use.) |
| Power Cable Length | 1 meter |
| Is Smart Device | No |
| Display Size | 1.9 Inches & Under |
| Certification | CE, FCC |
Available plug types:
EU Plug 
US Plug 
AU Plug 
FR Plug
5. Initial Setup
- Unpack the KT3400 controller and its sensor.
- Ensure the sensor cable is securely connected to the controller.
- Plug the KT3400 controller into a suitable power outlet (100~250Vac, 50/60Hz).
- Position the sensor in the environment where humidity and temperature are to be monitored and controlled.
- The device will power on and display current readings.
6. Operating Modes
The KT3400 supports four primary working modes, which can be switched using the 'MODE' button.
- HC Mode (Humidity Control): Controls humidification or dehumidification based on set start and stop humidity levels.
- TC Mode (Temperature Control): Controls heating or cooling based on set start and stop temperature levels.
- HC Alarm (Humidity Alarm): Triggers an alarm when humidity levels exceed or fall below set thresholds.
- TC Alarm (Temperature Alarm): Triggers an alarm when temperature levels exceed or fall below set thresholds.
Use the 'MODE' button to cycle through these modes and the 'SET', 'UP/CLK', and 'DOWN' buttons to adjust parameters within each mode.
7. Calibration
The KT3400 includes functions for calibrating both humidity and temperature readings to ensure accuracy. Specific steps for calibration are typically detailed in the full product manual. Please refer to the device's display and button combinations for entering calibration mode and adjusting values.
- Humidity Calibration: Adjusts the humidity sensor reading.
- Temperature Calibration: Adjusts the temperature sensor reading.
8. Additional Functions
- Reset Function: To reset all settings to their original default values, press the 'RESET' button using a suitable tool (e.g., a pin).
- Switch °C/°F: To switch between Celsius and Fahrenheit temperature units, press and hold the 'SET' button for 3 seconds.
- Memory Function: The KT3400 automatically saves all configured settings after a power outage, ensuring your preferences are retained.
- Button Sound Setting: This device includes a setting for button sounds. Refer to the device interface for adjustment options.
9. Troubleshooting (Error Codes)
The KT3400 displays specific error codes to indicate issues. Refer to the table below for common error codes and their meanings:
| Error Code | Description | Possible Cause / Solution |
|---|---|---|
| H1 | Sensor disconnected or measured humidity < 20%RH. | Check sensor connection. Ensure ambient humidity is within operating range. |
| H2 | Sensor short circuit or measured humidity > 95%RH. | Check sensor for damage or short circuit. Ensure ambient humidity is within operating range. |
| E1 | Sensor disconnected or measured temperature < -10°C (14°F). | Check sensor connection. Ensure ambient temperature is within operating range. |
| E2 | Sensor short circuit or measured temperature > 50°C (122°F). | Check sensor for damage or short circuit. Ensure ambient temperature is within operating range. |
10. Maintenance
- Cleaning: Wipe the device and sensor with a soft, dry cloth. Do not use abrasive cleaners or allow moisture to enter the unit.
- Storage: When not in use for extended periods, store the KT3400 in a cool, dry place away from direct sunlight and extreme temperatures.
- Sensor Care: Handle the sensor carefully to avoid damage. Ensure it is free from dust and debris for accurate readings.
11. User Tips
Based on general usage, here are some tips for optimal performance:
- For best results, place the sensor in a location that accurately represents the environment you wish to control, away from direct heat sources or drafts.
- Regularly check the sensor for any buildup of dust or debris, which can affect accuracy.
- When setting control parameters, allow for a small hysteresis (difference between start and stop values) to prevent rapid cycling of connected appliances.
12. Package Contents
Upon opening the package, you should find the following items:
- 1 x KT3400 Temperature and Humidity Controller
- 1 x Instruction Manual
- 1 x Retail Box
13. Warranty and Support
The Ketotek KT3400 comes with a 6-month warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
Return Policy:
- Free returns are available within 90 days of purchase.
- If you are not satisfied with your item, you may return it within 14 days for a replacement or money back. Please contact customer support before initiating a return.
- If the item is defective within 3 months of purchase, a replacement will be sent without extra charge, or a refund will be issued upon receipt of the defective item.
- If the item is defective after 3 months, you may still return it for a replacement. However, you will be responsible for the additional shipping fees.
For further support or inquiries, please contact Ketotek customer service.
