8H3B Chinese Manual Download
You can directly click the link below to download the complete 8H3B Chinese manual and obtain detailed guidance on product installation, wiring, parameter setting, and troubleshooting.
Download 8H3B Chinese Manual.pdf
8H3B Product Overview
8H3B is a high-performance intelligent display regulator, widely used in the measurement and control of industrial process parameters such as temperature, pressure, and flow. It adopts a modular design, supports multiple input signals, and features high precision and high stability.
This instrument is suitable for scenarios such as industrial automation, process control, and equipment integration, and can meet the control needs of different industries.
Main Functional Features
- Supports multiple input signals such as thermocouples, thermal resistors, and standard current/voltage
- Equipped with PID control, on-off control, and manual control functions
- Dual-row four-digit LED display, capable of simultaneously displaying measured value and set value
- Supports RS485 communication, convenient for connecting to host computer systems
- Wide power supply range AC/DC 85~265V, adapting to complex power supply environments
Typical Application Scenarios
- Temperature control of injection molding machines and extruders
- Temperature regulation of ovens, baking ovens, and heat treatment furnaces
- Pressure/liquid level control in water treatment and chemical processes
- Signal display and alarm for experimental equipment and testing instruments
8H3B Technical Parameters and Selection
When selecting a model, the specific model must be determined according to the measurement signal type, control output mode, and communication requirements. The following are the core technical parameters of the 8H3B for reference by engineering technicians and procurement personnel.
Core Technical Parameters
| Item | Parameter Description |
|---|---|
| Input Signal | Thermocouple: K, S, E, J, T, B, N, etc.; Thermal resistor: Pt100, Cu50; Standard signal: 4-20mA, 0-10V, etc. |
| Measurement Accuracy | ±0.2%FS or ±0.5%FS |
| Display Mode | Dual-row four-digit LED, measured value in red, set value in green |
| Control Output | Relay contact, SSR drive, 4-20mA analog quantity |
| Communication Interface | RS485 (Modbus RTU protocol) |
| Power Supply Voltage | AC/DC 85~265V or DC 24V (optional) |
| Working Environment | Temperature -10~50℃, humidity ≤85%RH (non-condensing) |
| Installation Method | Panel embedded, opening size 45×45mm or 68×68mm |
Selection Steps
- Confirm the measurement signal type (such as K-type thermocouple or 4-20mA)
- Determine the control output mode (relay, SSR, or analog quantity)
- Choose whether RS485 communication function is required
- Check the power supply and installation dimensions
- Generate the complete model code based on the above information
Installation and Wiring Key Points
Correct installation and wiring are the prerequisites for ensuring the stable operation of the 8H3B. Be sure to operate according to the terminal diagram in the manual, and avoid parallel routing of strong current and weak current signal lines.
Installation Precautions
- The instrument should be installed in an environment with no corrosive gases and no strong vibration
- Ensure good ventilation, avoid direct sunlight and heat source radiation
- The panel opening size must match the instrument housing, and it should be sealed and dustproof after installation
Wiring Precautions
- Power lines, signal lines, and output lines should be routed separately to reduce electromagnetic interference
- Thermocouple signals must use compensation wires, and attention should be paid to polarity
- When the relay output terminal is connected to an inductive load, it is recommended to install an RC arc suppressor
- RS485 communication lines should use twisted pair shielded cables, with the shielding layer grounded at one end
Operation and Parameter Setting
The 8H3B adopts button-based operation, and all parameter settings can be completed through the panel buttons. For first-time use, it is recommended to follow the steps below.
Basic Operation Process
- After power-on, the instrument performs self-test and displays the measured value
- Press the SET key to enter parameter setting mode
- Use the ▲/▼ keys to modify parameter values, press the SET key to confirm and switch to the next parameter
- After setting is completed, long press the SET key to exit, and the instrument returns to measurement status
- If factory settings need to be restored, select "Restore Defaults" in the specific menu
Common Parameter Descriptions
- Input Type: Select the signal type matching the sensor
- Lower and Upper Range Limits: Set the display range
- Control Mode: Select PID or on-off control
- Alarm Setting: Set alarm value and alarm mode
- Communication Address: Set RS485 communication address and baud rate
Common Problems and Maintenance
Regular maintenance can extend the service life of the 8H3B. When abnormalities occur, please first refer to the troubleshooting table in the manual.
Common Faults and Handling Methods
| Fault Phenomenon | Possible Cause | Handling Method |
|---|---|---|
| Display shows "HH" | Input signal exceeds range | Check whether the sensor and input signal are normal |
| Display shows "LL" | Input signal is below the lower range limit | Check sensor wiring and signal source |
| No control output | Output setting error or load failure | Check output parameters and external load |
| Communication failure | Address, baud rate mismatch, or wiring error | Verify communication parameters and wiring |
Daily Maintenance Suggestions
- Regularly check whether the wiring terminals are loose
- Use a dry soft cloth to clean the instrument surface, avoid using chemical solvents
- When not in use for a long time, store in a dry environment without corrosive gases
Conclusion
Through the 8H3B Chinese manual download and usage guide in this article, you can quickly master the selection, installation, wiring, and parameter setting methods of this instrument. For more detailed technical information, please download the complete PDF manual or contact our technical support team.