1. Introduction
This manual provides detailed instructions for the VTSYIQI Digital Spectrophotometer Φ11mm. This instrument is designed for precise color measurement across various materials, offering high repeatability and advanced features for professional applications. Please read this manual thoroughly before operating the device to ensure correct usage and optimal performance.
2. Product Features
- Measuring Aperture: Supports Φ11mm for diverse sample sizes.
- Horizontal Measurement Design: Features a low center of gravity and a physical positioning observation window for stable and accurate measurements, minimizing positioning errors.
- Ultra-High Repeatability Accuracy: Achieves dE*ab≤0.02, ensuring consistent and reliable measurement results.
- Extensive Measurement Parameters: Provides over 30 chroma indicators including spectral reflectance, CIE-Lab, CIE-LCh, ΔE*ab, covering power, whiteness, and yellowness.
- Multiple Evaluation Light Sources: Nearly 40 evaluation light sources available (e.g., A, B, C, D50, D55, D65) to meet various industry standards.
- PC Color Management System: Includes the ColorExpert software for Windows, connectable via Bluetooth or USB. This software offers modules for My Colors, Color Detection, Color Matching System, and Personal Center for comprehensive color management.

Image: Overview of the VTSYIQI Spectrophotometer highlighting its 11mm measuring port and 0.02 accuracy.

Image: Demonstrates the horizontal measurement capability and the physical positioning observation window for precise sample placement.

Image: Close-up of the spectrophotometer's display showing a dE*ab repeatability accuracy of 0.01, indicating high precision.
3. What's in the Box
Upon unpacking, please verify that all the following items are included:
- Main Spectrophotometer Unit
- USB Cable
- Calibration White Tile
- Φ11mm Measuring Aperture Plate
- Carrying Case
- Instruction Manual (this document)

Image: The spectrophotometer main unit, carrying case, USB cable, and aperture plate.
4. Setup
4.1 Initial Charging
Before first use, fully charge the spectrophotometer. Connect the device to a power source using the provided USB cable. The charging indicator will show the charging status.
4.2 Power On/Off
- To Power On: Press and hold the power button until the display illuminates.
- To Power Off: Press and hold the power button until the device shuts down.
4.3 Calibration
Regular calibration is crucial for accurate measurements.
- Ensure the device is powered on and stable.
- Place the provided calibration white tile securely in the measurement port.
- Navigate to the calibration menu on the device's display.
- Follow the on-screen prompts to perform white calibration.
- Once calibration is complete, remove the white tile.
4.4 Software Installation (ColorExpert)
The ColorExpert PC software enhances the spectrophotometer's capabilities.
- Insert the software installation media (if provided) or download the latest version from the official VTSYIQI website.
- Follow the on-screen instructions to install ColorExpert on your Windows PC.
- Connect the spectrophotometer to your PC via the USB cable or Bluetooth.
- Launch ColorExpert and ensure the device is recognized.

Image: The spectrophotometer connected to a computer displaying the ColorExpert color management system interface.
5. Operating Instructions
5.1 Basic Measurement
- Ensure the device is calibrated (refer to Section 4.3).
- Place the sample to be measured on a flat, stable surface.
- Position the spectrophotometer over the sample, ensuring the Φ11mm aperture is directly on the measurement area. Use the observation window to confirm precise placement.
- Press the measurement button. The device will perform the measurement and display the results (e.g., L*a*b* values, dE*ab).
- Record or save the measurement data as needed.

Image: A user performing a horizontal measurement on a sample, demonstrating the physical positioning observation window.
5.2 Advanced Measurement Settings
The spectrophotometer offers various settings for specific measurement needs.
- Chroma Indicators: Access the menu to select desired color spaces (e.g., CIE-Lab, CIE-LCh) and other indicators.
- Light Sources: Choose from nearly 40 standard illuminants (e.g., D65, A, F2) to simulate different lighting conditions.
- Tolerance Settings: Define acceptable color differences (tolerances) for pass/fail evaluations.
5.3 Using ColorExpert Software
Connect the spectrophotometer to your PC and use the ColorExpert software for advanced data analysis, color matching, and management.
- My Colors: Store and organize your measured color data.
- Color Detection: Perform detailed analysis of color properties.
- Color Matching System: Facilitate color formulation and matching processes.
- Personal Center: Manage user profiles and settings.
6. Maintenance
6.1 Cleaning
- Wipe the exterior of the device with a soft, dry cloth.
- For stubborn dirt, use a slightly damp cloth with mild detergent, then wipe dry immediately.
- Keep the measurement aperture and calibration tile clean and free of dust or debris. Use a lens cleaning cloth or air blower if necessary.
- Do not use abrasive cleaners, solvents, or harsh chemicals.
6.2 Storage
- Store the spectrophotometer in its carrying case when not in use to protect it from dust and physical damage.
- Keep the device in a cool, dry environment, away from direct sunlight, extreme temperatures, and high humidity.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery or power issue. | Charge the device using the USB cable. Ensure the power button is pressed and held correctly. |
| Inaccurate measurements. | Device not calibrated; dirty aperture/calibration tile; incorrect sample placement. | Perform calibration (Section 4.3). Clean the aperture and calibration tile (Section 6.1). Ensure the sample is placed correctly. |
| Cannot connect to PC software. | USB cable issue; Bluetooth not enabled; software not installed or outdated. | Check USB cable connection. Ensure Bluetooth is enabled on both devices. Reinstall or update ColorExpert software. |
| Display is blank or frozen. | Software error or temporary malfunction. | Perform a hard reset by holding the power button for an extended period (e.g., 10-15 seconds) until the device restarts. If the issue persists, contact support. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | VTSYIQI20240719140202VTSYIQI |
| Measuring Aperture | Φ11mm |
| Repeatability Accuracy | dE*ab≤0.02 |
| Structure | D/8 SCI SCE |
| Product Dimensions | 11.81 x 3.94 x 7.87 inches |
| Item Weight | 3.31 pounds |
| Manufacturer | VTSYIQI |
| ASIN | B0D9Q52944 |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact VTSYIQI customer support through the official website or your purchase platform. Please have your model number and purchase date ready when contacting support.