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 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, do not turn it on. Please contact us immediately.

1.2.2 Main Unit and Accessories

Figure 1

Note: Other optional accessories include measurement fixtures, haze/transmittance standard plates, and custom aperture plates (5 mm, 7 mm, 10 mm), among others.

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 Setting Up the Environment

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

Please keep the laboratory free of airborne dust; once dust enters the measurement orifice, it is difficult to clean and may affect the measurement results.

2.1.2 Sample Preparation

The surface of the sample being tested must be flat, clean, free of stains, and free of scratches. If the sample is a powder or liquid, it must be placed in a special sample dish to ensure that the sample completely fills the measurement aperture without any gaps.

2.2 Precautions for Use

When taking a measurement, press the measurement button and 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 error;

When the equipment is not in use, be sure to seal the measuring orifice with a dust cover to prevent dust from entering;

Do not force a shutdown or disconnect the USB cable during device calibration or measurement;

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; do not drop, bump, or crush the device, and avoid exposing the body 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, 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 power cord, and contact customer service promptly. Do not continue to operate the device;

Do not place the device near heat sources or in high-temperature environments to prevent damage to its components.

3. Equipment Operation

3.1 Power-On Calibration

The device must be recalibrated when used for the first time or after being idle for more than 8 hours. After turning on the device, the screen will display a calibration prompt. Please follow the on-screen instructions to ensure there are no foreign objects above the measurement aperture, then press the confirmation button to complete the calibration.

Figure 3

Note: If you have multiple measurement orifices, you must refer to Section 3.4.2 and perform a calibration each time you switch measurement orifices.

3.2 Haze/Transmittance Measurement

Place the sample on the measurement aperture so that it covers the entire aperture. Press the measurement button to complete a measurement.

Figure 4

3.3 Comparison Test Between Reference Standards and Samples

3.3.1 Measurement of Reference Standards

Follow the same procedure as in Section 3.2.

Use the up and down arrows to navigate to the option to save the reference sample measurement data, then use the Enter key and the up and down arrows to edit the reference sample name and save it.

Figure 5

3.3.2 Comparative Testing

Use the up and down arrows to navigate to “Sample Measurement,” then press the Confirm button to enter the sample measurement screen.

Figure 6

Place another sample on the measurement aperture so that it covers the entire aperture, then press the measurement button to complete a measurement.

Figure 7

Use the up and down arrows to navigate to the option to save the reference sample measurement data, then use the confirm button and the up and down arrows to edit the sample name and save it.

3.3.3 Measurement of Other Reference Standards and Samples

Use the up and down arrows to select the standard sample, then press the Confirm button to return to the standard sample measurement screen. Repeat steps 3.3.1 and 3.3.2 to measure and save measurement data for other standard samples and test samples.

3.4 Overview of Other Features

3.4.1 Main Interface

Press the Back button to return to the device’s main screen.

Figure 8

3.4.2 Settings Interface

Use the up and down arrows to select the settings screen, then press the OK button.

Figure 9

Measurement Settings Screen.

Figure 10

System Settings screen.

Figure 11

4. Software Operation

4.1 Connection and Calibration

Connect the HM-100 to your computer using the standard USB cable, turn it on, and follow the instructions in Section 3.4.1 to access the USB communication interface. Make sure the device’s display shows the following information.

Figure 12

If you see a message stating that the USB is not connected, check the USB cable connection and try again after using a different USB port on your computer.

Install the software on your computer and open it; the software will automatically connect to the device. The first time you use the software, it will prompt you to calibrate it; simply follow the on-screen instructions to complete the calibration.

4.2 Introduction to the Software’s Main Interface

Figure 13

4.3 Overview of Other Key Features

Figure 14

Print Settings: You can configure the measurement report title, sample name, operator, and more.

Figure 15

5. Daily Maintenance and Care of Equipment

5.1 Routine Maintenance

5.1.1 Protection of the Measurement Orifice

After completing the measurement, be sure to seal the measurement port with a dust cap to prevent dust from entering.

5.1.2 Cleaning and Maintenance

Unit Surface: Wipe off dust and stains from the unit’s surface with a clean, anti-static soft cloth. For stubborn stains, lightly wipe the area with a small amount of water. Do not use detergents or other corrosive liquids;

Display: Gently wipe the screen with a dedicated screen-cleaning cloth to avoid scratching it. If dust gets on the screen, gently brush it away with a lint-free brush.

5.2 Long-Term Storage

When the equipment is not in use for an extended period, after completing routine maintenance, store it in a dry, well-ventilated environment to avoid moisture or direct sunlight;

Disconnect all cables, store the accessories separately, and cover the surface of the equipment with a dust-proof cloth;

Turn on the device for 30 minutes each month to prevent the internal electronic components from deteriorating.

6. Troubleshooting and Resolving Common Problems