1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your SINO SDS200 Metal 4-Axis LCD Digital Readout. Designed for precision measurement in various machining applications, including milling, lathe, and CNC, the SDS200 features a robust all-metal shell, a high-definition LCD display, and multi-language support. Please read this manual thoroughly before operating the device to ensure safe and efficient use.

2. Setup
2.1 Unpacking and Components
Carefully unpack the SDS200 unit and verify that all components are present:
- SDS200 Digital Readout Unit
- Power Cable
- Operation Manual
- Mounting Brackets and Hardware
- (Optional) Linear Scales / Rotary Encoders (depending on your kit)

2.2 Mounting the Display Unit
Secure the SDS200 display unit using the provided mounting brackets and hardware. Ensure it is placed in a stable position with good visibility and away from excessive vibration or heat sources.
2.3 Power Connection
Connect the power cable to the AC80V~240V 50/60Hz input on the rear panel of the SDS200. Ensure the power switch is in the OFF position before connecting. Once connected, you may switch the power ON.

2.4 Linear Scale / Encoder Connection
The SDS200 can simultaneously connect glass linear scales and rotary encoders. Use the DB9 interface ports (labeled X, Y, Z, W) on the rear panel for connecting your linear scales or encoders. The input signal supports both TTL and RS422 types.

3. Operating Instructions
The SDS200 features a large LCD display and an intuitive control panel with numeric keys and dedicated function buttons (F1-F5) for various operations.
3.1 Basic Functions
- Zeroing: Press the 'Zer' button to set the current axis reading to zero.
- MM/Inch Conversion: Use the 'INCH/MM' button to switch between metric (mm) and imperial (inch) units.
- Radius/Diameter Display: Toggle between radius and diameter display modes as needed.
- Mid-split Function: Used for finding the center point.
- 200 Points Auxiliary Zero Position Function: Store and recall multiple zero points.
- Mathematics Calculation: Perform basic calculations directly on the unit.
3.2 Language Settings
The system supports five national languages: Chinese, English, French, German, and Spanish. To change the language:
- Access the 'User settings' menu.
- Use the F3 or F4 buttons to cycle through the available languages.
- Select your desired language and save the settings.

3.3 Machining Functions
The SDS200 offers a variety of advanced machining functions:
- PCD (Pitch Circle Diameter) Circumferential Division: Applicable to milling machines and spark testers.
- Involute Chamber Machining Function: Applicable to milling machines.
- Bevel Machining / Angular Surface Processing: Applicable to milling machines.
- N3 Function: Applicable to milling machines.
- Diagonal Boring: Applicable to milling machines.
- R-arc Function: Applicable to milling machines.
- Taper Measuring Function: Applicable to lathes.
- 200-Tool Library: Applicable to lathes, allowing storage of tool offsets.
- Anti-dithering Function: Applicable to grinding machines.

3.4 Product Demonstration Video
4. Maintenance
To ensure the longevity and optimal performance of your SDS200 Digital Readout, follow these maintenance guidelines:
- Cleaning: Keep the display unit clean and free from dust, chips, and debris. Use a soft, dry cloth for cleaning the screen and housing. Avoid using harsh chemicals, solvents, or abrasive materials, as these can damage the display or the metal finish.
- Connections: Periodically check all cable connections (power, linear scales/encoders) to ensure they are secure and free from damage. Loose connections can lead to inaccurate readings or intermittent operation.
- Environmental Conditions: Operate the unit within its specified environmental conditions (temperature, humidity) to prevent damage. The robust metal shell provides enhanced durability and anti-interference capabilities, contributing to a longer product service life.
- Storage: When not in use for extended periods, store the unit in a clean, dry environment.
5. Troubleshooting
If you encounter issues with your SDS200, refer to the following common problems and solutions:
- No Display / Unit Not Powering On:
- Check the power cable connection to the unit and the power outlet.
- Ensure the power switch on the rear panel is in the ON position.
- Verify that the input voltage is within the specified AC80V-240V range.
- Incorrect or Unstable Readings:
- Ensure all linear scales or encoders are properly connected to their respective DB9 ports.
- Check for any physical damage to the linear scales, cables, or connectors.
- Verify that the correct resolution setting (e.g., 0.005mm) is selected in the unit's parameters.
- Confirm that the linear scales/encoders are compatible with TTL or RS422 signal types.
- Incorrect Display Language:
- Navigate to the 'User settings' menu.
- Use the F3 or F4 buttons to switch to the desired language (Chinese, English, French, German, Spanish).
- Save the settings to apply the change.
6. Specifications
| Attribute | Value |
|---|---|
| Model Number | SDS200 DRO |
| Product Name | SINO Metal LCD DRO |
| Advantage | Big LCD display |
| Input Voltage | AC80V~240V 50/60Hz |
| Resolution | 0.005mm (also supports 1μm/5μm/0.1μm/0.5μm/10μm/20μm/50μm) |
| Interface Type | DB9 (TTL and RS422 compatible) |
| Language Support | Chinese, English, French, German, Spanish |
| Material | Metal cover |
| Certification | CE |
| Origin | Mainland China |
| Battery Included | No |
| High-concerned chemical | None |
7. User Tips
- RS422 Signal Compatibility: The SDS200 is compatible with RS422 signals, offering broad compatibility with various linear scales and encoders. This ensures flexibility when integrating with existing equipment.
- Multi-Language Support: Take advantage of the five supported languages (Chinese, English, French, German, Spanish) for easier operation and understanding, especially if multiple operators use the device.
- Robust Design: The all-metal shell not only enhances durability but also improves anti-interference capabilities, making it reliable in industrial environments where electrical noise might be a concern.
- Clear Display: The large LCD display provides clear readings, which is beneficial for reducing eye strain during long operating hours.
8. Warranty and Support
For technical support, service, or warranty inquiries, please contact your authorized SINO dealer or the manufacturer directly. Refer to the product packaging or purchase documentation for specific contact information and warranty terms. Keep your purchase receipt as proof of purchase.





