1. Unboxing and Basic Familiarization with the Equipment

1.1 Key Technical Specifications

1.2 Unboxing and Checking the Contents

1.2.1 Unpacking and Visual Inspection

When unpacking the device, handle it gently to avoid scratching the exterior casing with sharp tools. After unpacking, first inspect the exterior of the device to ensure there is no visible deformation or dents, and that the buttons are not damaged or loose. If you notice any abnormalities with the device or its accessories, please contact us immediately.

1.2.2 Main Unit and Accessories

Figure 1

Download links for the digital user manual, software, warranty card, and other materials have been sent via email. Please download them as soon as possible. If you missed the email, you may contact us to request the download links again.

1.3 Description of Equipment Structure

Figure 2

2. Precautions for Use

2.1 Precautions Before Operation

2.1.1 Preparing the Environment

Before taking a measurement, allow the device and the sample to stand in the same environment for at least 30 minutes to ensure they reach the same temperature. The measurement environment must be free from direct strong light and stray light interference. Avoid operating in environments with high temperatures, high humidity, or excessive dust. The ambient temperature should be maintained between 10°C and 35°C, with relative humidity ≤80%(no condensation).

2.1.2 Sample Preparation

The surface of the sample being tested must be flat, clean, free of stains, and free of scratches. For powder or liquid samples, use a dedicated sample dish to ensure the sample completely covers the measurement aperture without any gaps. For irregularly shaped samples, ensure that the measurement probe fits snugly against the measurement area of the sample to prevent light leakage.

2.1.3 Equipment Inspection

Before turning on the device, check the measurement port for dust or dirt and ensure that the buttons and ports are functioning properly. After turning on the device, check that the battery is sufficiently charged (if the battery is low, charge it first to avoid a power outage during measurement).

2.2 Precautions for Use

2.2.1 Measurement Procedures

When taking a measurement, place the device’s sensor in close contact with the sample’s surface, ensuring it is level and free from light leakage. After pressing the button, keep the device still until the measurement is complete (1 second); do not move the device during the measurement process. It is recommended to take 3–5 measurements of the same sample and use the average as the final result to minimize measurement errors.

2.2.2 Functional Operation Specifications

Do not force a shutdown or disconnect the USB cable during the device’s self-test, calibration, or measurement processes. When switching between measurement parameters, wait until the display has finished loading before proceeding to the next step. If you need to export saved measurement data, connect the device before shutting it down to prevent data loss.

2.2.3 Contraindications for Equipment Use

Do not touch the optical components inside the measurement port with your hands, and do not point the measurement end toward a strong light source. Since this is a handheld device, do not drop, bump, or crush it, and avoid exposing the unit to water or other liquids.

2.3 Safety Warnings

Do not attempt to disassemble or replace any internal parts of the device. In the event of a malfunction, please contact official customer service or an authorized dealer for assistance. Unauthorized disassembly will void the warranty;

If liquid, dust, or other substances enter the device, immediately turn off the power, unplug the charging cable, and contact customer service promptly. Do not continue to use the device;

If equipment and accessories (such as the calibration whiteboard stand) are accidentally swallowed by a child, they may pose a choking hazard or other risks; therefore, the equipment must be kept out of the reach of children;

Do not place the device near heat sources, open flames, or in high-temperature environments to prevent the battery from swelling and damage to the device’s components.

3. Equipment Operation

3.1 Color Measurement Procedure

Figure 3

3.2 Color Difference Measurement Procedure

3.2.1 Measure the reference samples first

The procedure for measuring the reference standard is the same as that for color measurement.

Figure 4

3.2.2 Re-measurement of Color Difference

Figure 5

4. App Operation

4.1 Online

Turn on the CD-320PRO. Follow the instructions below to install the app on your phone.

Figure 6

Open the app and tap “Connect.”

Figure 7

4.2 Calibration

If the app prompts you to calibrate, follow the instructions to perform white and black calibration.

When the calibration whiteboard base is attached to the test hole, click to perform white calibration.

Figure 8

Remove the calibration whiteboard stand, align the test holes with the floor, ensuring they are at least 1 meter above the ground, and click to perform the black calibration.

Figure 9

4.3 Measurement Procedure

4.3.1 Color Measurement and Color Difference Measurement

Figure 10

4.3.2 Saving and Loading Reference Color Swatches

To save this reference color chart to the app, edit its name, select a save location, and save it.

Figure 11

You can then directly access the saved color charts or use the app’s built-in reference color charts as standards. In this case, there is no need to measure the reference standards again; you can proceed directly to measuring the color difference of the sample.

Figure 12

4.4 Parameter Settings

4.4.1 Measurement Parameter Settings

Figure 13

4.4.2 Permissible Error Settings

Figure 14

5. Software Operation

5.1 Connection and Calibration

Connect the CD-320PRO to your computer using the dedicated USB cable, and turn on the CD-320PRO. Install the following software on your computer.

Figure 15

Figure 16

If the software prompts you to perform calibration, follow the on-screen instructions to perform white and black calibration. For calibration procedures and steps, refer to Section 4.2.

5.2 Software Operation

Figure 17

6. Daily Maintenance and Care of Equipment

6.1 Cleaning and Maintenance

6.1.1 Cleaning the Body and Display

Body Surface: Wipe dust and stains from the body with a clean, soft cloth. For stubborn stains, you may dip the cloth in a small amount of water and wipe gently. Do not use detergents or other corrosive liquids;

Display: Gently wipe the screen with a dedicated screen-cleaning cloth to avoid scratching it. Do not touch the display directly with your fingers. If dust gets on the screen, gently brush it away with a lint-free brush.

6.1.2 Cleaning the Calibration Plate

The calibration plate is a standard accessory; surface wear and stains will affect calibration accuracy: Gently wipe the surface of the calibration plate with a lint-free cloth. If there are stubborn stains on the surface of the calibration plate, contact customer service promptly to have it replaced. Do not attempt to sand or repair the calibration plate yourself.

6.2 Battery Maintenance

6.2.1 Charging and Maintenance

Use the device’s standard USB cable; do not use non-standard fast-charging cables or high-wattage chargers to avoid damaging the battery. Avoid charging the device in high-temperature environments, and unplug the charging cable immediately after charging is complete to prevent overcharging. Charge the device promptly when the battery level falls below 15% to avoid deep discharge of the lithium battery, which can shorten its service life.

6.2.2 Battery Life Maintenance

The device’s built-in lithium battery is rechargeable; under normal use, a single charge allows for 10000 consecutive measurements;

When the device is not in use for an extended period, ensure that the battery charge remains between 50% and 80%. Recharge the battery once every three months to restore the charge to between 50% and 80%, to prevent the battery from becoming deeply discharged or swelling;

If the battery shows signs of swelling, leakage, or a significant decrease in battery life, stop using it immediately and contact us for repair.

Troubleshooting and Resolving Common Issues