PMZZHUPVR GHW38/HB961
PMZZHUPVR GHW38 Incremental Rotary Encoder and HB961 Digital Counter User Manual
Model: GHW38/HB961 | Brand: PMZZHUPVR
1. Introduction
This manual provides comprehensive instructions for the PMZZHUPVR GHW38 Push-Pull Output Wheel Incremental Encoder and the HB961 Digital Display Counter. This integrated system is engineered for accurate length and position measurement in various industrial settings. Its design emphasizes high integration, stable performance, and ease of installation, making it suitable for a wide range of product detection applications.
Key features include:
- Wide application range and stable performance.
- Smooth and precise operation.
- High integration for reliable performance.
- Broad applicability in product detection.
- Simple structure, facilitating easy installation.
2. Safety Information
Please read and understand all safety instructions before installing, operating, or maintaining the device. Failure to comply with these instructions may result in personal injury or damage to the equipment.
- Electrical Safety: Ensure all power connections are made by qualified personnel. Disconnect power before performing any wiring or maintenance. The HB961 counter operates on 220V AC, and the GHW38 encoder requires 5-26V DC.
- Environmental Conditions: Operate the device within specified environmental limits (temperature, humidity) to prevent malfunction.
- Handling: Handle the encoder and counter with care to avoid physical damage to sensitive components.
- Intended Use: Use the product only for its intended purpose as an incremental encoder and digital counter.
3. Product Overview
The PMZZHUPVR GHW38/HB961 system consists of an incremental rotary encoder with a measuring wheel and a digital display counter unit.

Figure 3.1: Complete PMZZHUPVR GHW38 Encoder and HB961 Counter System. This image shows the GHW38 incremental encoder with its measuring wheel and mounting arm, connected via a cable to the HB961 digital display counter.

Figure 3.2: Close-up view of the GHW38 Incremental Rotary Encoder. This image highlights the encoder unit, its measuring wheel (available in 200mm or 300mm circumference), and the spring-loaded mounting arm designed for consistent contact with the measured surface.
4. Specifications
| Parameter | Value |
|---|---|
| Model Number | GHW38 / HB961 |
| Certification | CE |
| Encoder Output Type | Push-Pull Output |
| Encoder Operating Voltage | 5-26 V DC |
| Wheel Circumference Options | 200 mm / 300 mm |
| HB961 Counter Operating Voltage | 220 V AC |
| Product Weight | 1000 Grams |
| Assembly Required | No |
| Quantity | 1 |
5. Setup and Installation
The GHW38 encoder and HB961 counter are designed for straightforward installation. Follow these general guidelines:
5.1 Mounting the Encoder
Mount the GHW38 encoder securely to a stable surface, ensuring the measuring wheel maintains consistent contact with the material or surface to be measured. The spring-loaded arm allows for slight variations in surface height while maintaining pressure.

Figure 5.1: GHW38 Encoder Dimensions and Wiring Diagrams. This image provides critical dimensions for mounting the encoder, along with diagrams illustrating the output phase shift and the connection table for wiring the encoder to the counter.
5.2 Wiring Connections
Refer to the connection diagram provided in Figure 5.1 for proper wiring between the GHW38 encoder and the HB961 counter. Ensure correct voltage supply for both units (5-26V DC for encoder, 220V AC for counter).
- Connect the encoder's signal wires (A, B, Z, and their inverted counterparts A-, B-, Z- if applicable) to the corresponding input terminals on the HB961 counter.
- Connect the Vcc (power supply) and GND (ground) wires from the encoder to the appropriate power source.
- Ensure the HB961 counter is connected to a stable 220V AC power supply.
- Verify all connections are secure and insulated to prevent short circuits.
6. Operation
Once installed and wired correctly, the system is ready for operation.
- Power On: Apply power to both the GHW38 encoder (5-26V DC) and the HB961 digital counter (220V AC). The HB961 display should illuminate.
- Measurement: As the measuring wheel of the GHW38 encoder rotates due to contact with the moving material, it generates pulses. The HB961 counter receives these pulses and displays the accumulated count, which corresponds to the measured length or position.
- Display Functions: The HB961 counter typically includes buttons for functions such as reset, setting parameters (e.g., pulse-to-unit conversion factor), and mode selection. Refer to the HB961 specific documentation for detailed operation of its display and settings.
- Calibration: For accurate measurements, ensure the counter's settings match the encoder's pulses per revolution (PPR) and the wheel's circumference.
7. Maintenance
Regular maintenance ensures the longevity and accuracy of your encoder system.
- Cleaning: Keep the measuring wheel and encoder body clean from dust, debris, and oil. Use a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- Inspection: Periodically inspect the measuring wheel for wear or damage. Ensure the mounting arm's spring mechanism operates smoothly and provides adequate contact pressure.
- Cable Integrity: Check all cables for signs of wear, cuts, or loose connections.
- Storage: If storing the device for an extended period, ensure it is kept in a dry, clean environment away from extreme temperatures and direct sunlight.
8. Troubleshooting
If you encounter issues with your PMZZHUPVR GHW38/HB961 system, refer to the following common problems and solutions:
- No Display on HB961:
- Check if the 220V AC power supply to the HB961 is connected and active.
- Verify the power cable is not damaged.
- No Count or Incorrect Count:
- Ensure the GHW38 encoder is receiving its 5-26V DC power supply.
- Check the signal wiring between the encoder and the counter for loose connections or incorrect polarity.
- Verify the measuring wheel is making firm and consistent contact with the surface.
- Confirm the counter's input settings (e.g., pulse type, division ratio) match the encoder's specifications.
- Inspect the encoder wheel for slippage or damage.
- Intermittent Readings:
- Check for loose wiring connections or damaged cables.
- Ensure the encoder is securely mounted and not vibrating excessively.
- Clean the measuring wheel and the surface being measured to prevent slippage.
If the problem persists after attempting these solutions, please contact customer support.
9. Warranty and Support
For warranty information and technical support, please refer to the purchase documentation or contact your seller directly. Keep your proof of purchase for any warranty claims.
When contacting support, please provide the following information:
- Product Model: GHW38/HB961
- Date of Purchase
- Detailed description of the issue
Related Documents - GHW38/HB961
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