WH8040 Digital Humidity Controller User Manual

1. บทนำ

The WH8040 Digital Humidity Controller is an advanced electronic instrument designed for precise humidity regulation. It integrates modern humidification and dehumidification technology into a compact, easy-to-operate device. Featuring a high-precision capacitive humidity sensor, it offers fast response and high accuracy, making it suitable for various automatic intelligent control systems in diverse environments. The controller supports both humidification and dehumidification modes, configurable via its menu, and retains settings even after power loss.

2. ข้อมูลจำเพาะ

Below are the technical specifications for the WH8040 Digital Humidity Controller:

3. การติดตั้งและการเดินสายไฟ

3.1 แผนผังการเดินสายไฟ

The WH8040 controller features terminals for power, signal, and sensor connections. Ensure all connections are secure and follow the diagram below. The power supply voltage must match the controller's rated voltage (AC 220V, DC 12V, or DC 24V) with a deviation not exceeding ±10%.

3.2 Important Wiring Notes

• To prevent high-frequency interference, the sensor line should not be bundled with the power line or load equipment wire. Keep them separated.
• Strictly distinguish between the sensor, power line, and load output interface during installation.
• The temperature sensor is used to calculate humidity more precisely. It should be installed in the vicinity of the humidity probe.

4. คู่มือการใช้งาน

The WH8040 controller features a digital display and four buttons for operation: SET, RST, Up (▲), and Down (▼).

4.1 การทำงานพื้นฐาน

• **RST Button (Reset/Power On/Off):**
  • Press RST to switch between starting up and powering off.
  • When powered off, press RST to start up.
  • When powered on, press and hold RST for three seconds to power off.
  • Press and hold RST for 3 seconds to reset all parameter settings to factory defaults.
• **SET Button (Settings):**
  • Press SET to enter the humidity control settings. Use ▲ or ▼ to adjust values.
  • Press SET again to exit the setting mode and save changes.
  • Press and hold SET for 3 seconds to enter the program menu code mode (displays HC).
  • In program menu mode, press SET to enter a specific parameter code, then use ▲ or ▼ to change the value. Press SET again to save and exit.
• **Up (▲) and Down (▼) Buttons:**
  • Use to adjust values in setting modes.
  • Press and hold ▲ or ▼ for three seconds to enter fast adjust mode.
• **Lock/Unlock Parameters:**
  • In normal display state, press and hold the ▼ button to display "OFF" or "ON". "OFF" means parameters are locked, "ON" means unlocking.
  • When parameters are locked, only the humidity setting can be changed; other parameters in the code table can only be viewed, not set.

4.2 Program Menu Code Mode

To enter the program menu code mode, press and hold the SET key for 3 seconds. The display will show "HC". Use the ▲ or ▼ buttons to cycle through the parameter codes: HC, CP, PU, CA, HP.

4.3 Control Modes Explained

• **Humidification Control (HC set to C):**

  Set your desired control humidity value (e.g., 50% RH) and humidity return difference (e.g., 5% RH). When the ambient humidity value is less than or equal to (set value - return difference), the relay output starts (humidification begins). When the ambient humidity value is greater than or equal to the set value, the relay output stops.
• **Dehumidification Control (HC set to H):**

  Set your desired control humidity value (e.g., 50% RH) and humidity return difference (e.g., 5% RH). When the ambient humidity value is greater than or equal to (set value + return difference), the relay output starts (dehumidification begins). When the ambient humidity value is less than or equal to the set value, the relay output stops.

• **PU (Delay Start):**

  When the relay stops outputting, it starts timing. The interval time to the next start must be greater than the delay start time to avoid frequent starts and protect the equipment.

• **CA (Corrected Humidity):**

  Display humidity = Test humidity + correction humidity. Use this to fine-tune the displayed humidity if it deviates from a known standard.
• **HP (Over-limit Alarm):**

  In humidification mode, the alarm triggers if humidity is less than or equal to (set humidity - HP). In dehumidification mode, the alarm triggers if humidity is greater than or equal to (set humidity + HP). If HP is set to 0, the alarm function is turned off.

5. การบำรุงรักษา

• Keep the humidity controller away from water drops. It is not waterproof.
• Ensure the device is not installed in locations accessible to children or the elderly to prevent accidental damage or misuse.
• Regularly check wiring connections for looseness or damage.
• Keep the sensor clean and free from dust or debris to ensure accurate readings.

6 การแก้ไขปัญหา

• **Screen shows 100% RH but environment doesn't feel very wet:** This might indicate a fault with the equipment. Try removing the humidity sensor and observing if there's any change in the reading. If the issue persists, the sensor might need replacement.
• **Light on the side of the display is blinking:** This indicates the device is in a delayed start state (PU parameter is active). Wait for the delay to complete.
• **Incorrect output behavior:** Ensure you have strictly followed the wiring diagram and correctly understand the output mode. The output is a relay switch mode only.
• **Inaccurate humidity readings:** Check if the sensor line is separated from power and load lines to avoid interference. Also, ensure the temperature sensor is correctly placed near the humidity probe.

7. เคล็ดลับผู้ใช้

• **Clarity is Key:** Some users have found the instructions challenging. Take your time to understand each parameter and its function before making adjustments. Refer to the parameter table for quick reference.
• **Initial Setup:** When first setting up, it's recommended to keep the delay start (PU) at 0 to understand the immediate effect of your settings. Once comfortable, you can set a delay to protect your connected equipment from frequent cycling.
• **Calibration:** If you have a known accurate hygrometer, use the CA (Humidity Correction Value) parameter to calibrate your WH8040 for optimal precision.
• **Application Versatility:** This controller is highly versatile and can be used in various settings such as fish tanks, chicken coops, greenhouses, warehouses, and terrariums to maintain ideal humidity levels.

8. การรับประกันและการสนับสนุน

For detailed warranty information and technical support, please refer to the official product documentation provided by the manufacturer or contact your retailer. This manual provides operational guidance; specific warranty terms may vary by region and seller.

A comprehensive user manual in PDF format is available for download. This document contains additional technical details and diagrams that may be helpful for advanced users or specific installation scenarios. Please refer to the seller's product page for the direct link to the PDF manual.