1. Introduction
The HYMSEANN HS800-2 is a versatile 2-axis Digital Readout (DRO) system designed for precision measurement in various machining applications. This unit features a large LCD display and supports multiple languages, making it user-friendly for a global audience. It is widely applicable to lathes, milling machines, grinders, wire cutting machines, drilling machines, and more.
Supported languages include: Chinese Simplified, Chinese Traditional, English, German, Spanish, French, Turkish, Portuguese, Russian, Korean, Japanese, Polish, Vietnamese, Italian, Ukrainian, Czech, Dutch, Slovenian, and Croatian.

2. Package Contents
Please verify that all items listed below are included in your package:
- 1 x HS800-2 Digital Readout Display Unit
- 1 x Display Cover
- 1 x Mounting Bracket
- 1 x Screw Bag (for mounting)
- 1 x User Manual
- 1 x Power Cable (with appropriate plug for your region)

3. Setup Instructions
3.1 Mounting the DRO
Use the provided mounting bracket and screws to securely attach the HS800-2 display unit to your machine. Ensure the display is positioned for optimal visibility and accessibility during operation.

3.2 Power Connection
Connect the power cable to the AC input port on the rear of the DRO unit. The unit supports a wide voltage range of AC 80V~264V (50HZ~60HZ). Ensure the power switch is in the OFF position before connecting to a power source. The package includes a power plug suitable for your region (US, AU, EU, UK options).

3.3 Linear Scale Connections
Connect your linear scales to the corresponding X and Y axis DB9 ports on the rear of the DRO unit. The HS800-2 is compatible with TTL square wave/EIA-442 signals and can be matched with various linear scales from brands like Sino, Rational, Easson, HXX, DITRON, and SINPO. Please note that linear scales are not included in the standard package.

3.4 DB-9 TTL Signal Wiring Diagram
Refer to the following table for the standard DB-9 pin assignments for TTL signal connections:
| Pin | Signal |
|---|---|
| 1 | N/A |
| 2 | 0V |
| 3 | N/A |
| 4 | Ground |
| 5 | N/A |
| 6 | A |
| 7 | +5V |
| 8 | B |
| 9 | R |

4. Operating Instructions
The HS800-2 offers a high-performance universal display console with dedicated functions for Milling, Lathe, and Grinding applications. Its large LCD display ensures easy readability.

4.1 Basic Functions
- 200 Points Auxiliary Zero Position Function: Store and recall up to 200 auxiliary zero points.
- Mid-split Function: Easily find the center point of a workpiece.
- "mm/inch" Conversion Display: Switch between metric and imperial units.
- Radius/Diameter Switch Display: Toggle between radius and diameter readings for lathe applications.
- Segmented Error Compensation: Compensate for linear errors in specific segments of the scale.
- Linear Error Compensation: Compensate for overall linear errors.
- Power Interruption Memory: Retains current position and settings after power loss.
- Sleep Switch: Power-saving mode.
- Mathematics Calculation: Perform basic arithmetic operations.
- RS-232-C Interface (Option): For data output and communication.
4.2 Machining Functions
- PCD (Pitch Circle Diameter) Circumferential Division: Applicable to milling machines and spark testers for drilling holes on a circle.
- Involute Chamber Machining Function: Applicable to milling machines for complex curve generation.
- Bevel Machining/Angular Surface Processing: For creating angled surfaces on milling machines.
- N3 Function: Specific function for milling machines (refer to detailed manual for usage).
- Diagonal Boring: For boring operations along a diagonal path on milling machines.
- R-arc Function: For machining arcs on milling machines.
- Taper Measuring Function: Applicable to lathes for measuring tapers.
- Anti-dithering Function: Applicable to grinding machines for stable readings.
5. Maintenance
To ensure the longevity and accurate performance of your HS800-2 Digital Readout, follow these maintenance guidelines:
- Cleaning: Regularly wipe the display and housing with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth with mild soap, then dry thoroughly. Avoid abrasive cleaners or solvents.
- Environment: Operate and store the DRO in a clean, dry environment, away from excessive dust, moisture, and extreme temperatures.
- Connections: Periodically check all cable connections (power, linear scales) to ensure they are secure and free from damage.
- Linear Scales: Keep your linear scales clean and free of debris for accurate readings. Refer to your linear scale's manual for specific cleaning instructions.
6. Troubleshooting
If you encounter issues with your HS800-2 DRO, consider the following common troubleshooting steps:
- No Power: Ensure the power cable is securely connected to both the DRO and a functional power outlet. Check the power switch on the rear of the unit. Verify the power source is supplying the correct voltage.
- No Display: If the unit powers on but the display is blank, try restarting the unit. If the issue persists, contact support.
- Inaccurate Readings: Check that the linear scales are clean and properly installed. Ensure all scale cables are securely connected to the correct axis ports on the DRO. Verify the resolution settings in the DRO match your linear scales.
- Axis Not Responding: Confirm the linear scale for the affected axis is properly connected and not damaged. Check the DB9 wiring according to the diagram in Section 3.4.
- Functionality Issues: If specific machining functions are not working as expected, review the relevant section in this manual or the comprehensive user manual for correct parameter settings and operation sequences.
For persistent issues, please refer to the Warranty and Support section for contact information.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | HS800-2 |
| Brand Name | HYMSEANN |
| Input Voltage | AC 80V~264V / 50HZ~60HZ |
| Power Consumption | 25VA |
| Output Voltage | 5VDC |
| Acceptable Signal | TTL square wave / EIA-442 |
| Signal Plug Type | DB9 |
| Acceptable Resolution | 0.1um, 0.5um, 1um, 2um, 5um, 10um |
| Matchable Scales | EASSON, HXX, SINO, RATIONAL, DITRON, SINPO, etc. |
| Application | Lathe, Mill, Drill, Boring machine, etc. |
| Rotary Encoder Support | Yes |
| Certification | CE |
| Origin | Mainland China |
| Battery Included | No |
| High-concerned chemical | None |
8. User Tips
- Read the Manual: Thoroughly familiarize yourself with all functions and settings described in this manual to maximize the DRO's capabilities.
- Calibration: Perform initial calibration and periodic checks of your linear scales and DRO settings to ensure consistent accuracy.
- Cleanliness: Keep the display and linear scales clean to prevent dust and debris from affecting readings or damaging components.
- Power Cycle: If the DRO behaves unexpectedly, a simple power cycle (turning off and on) can often resolve minor glitches.
- Language Setting: Utilize the multilingual support to set the display language to your preference for easier operation.
9. Warranty and Support
9.1 Warranty Information
The HYMSEANN HS800-2 Digital Readout comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use.
Additionally, a 1-month free replacement is offered for products with defects upon receipt. Buyers must return the product in its original condition and bear the shipping costs for return.
A 12-month free maintenance service is also provided. During this period, buyers are responsible for shipping costs for returns, and for the cost of any parts required for replacement.
9.2 Customer Support
For any technical assistance, troubleshooting, warranty claims, or inquiries regarding linear scales, please contact the seller or HYMSEANN Official Store directly. When contacting support, please provide your product model (HS800-2) and a detailed description of the issue.





