1、 Preparation work

1. Equipment inspection

Before starting the test, be sure to carefully check whether the equipment is in normal working condition. Confirm that all components (such as lasers, detectors, sampling devices, etc.) have been correctly installed and are undamaged. Check the power connection and grounding status to ensure the safe operation of the equipment.

2. Sample preparation

Select an appropriate amount of samples according to the testing requirements and evenly disperse them. Avoid large particles or aggregates in the sample, as this can affect the accuracy of the test results. For certain special samples (such as those that are prone to moisture absorption or volatile substances), appropriate protective measures should be taken, such as storing them in sealed containers or conducting tests in a certain environment.

2、 Calibration and Setting

1. Equipment calibration

Use standard samples to calibrate the instrument to ensure its measurement accuracy. Normally, regular calibration should be performed according to the manufacturer's instructions, and the data from each calibration should be recorded to track changes in equipment performance. If significant deviations are found in the measurement results, parameters should be adjusted promptly or professional personnel should be contacted for maintenance.

2. Parameter setting

Select the appropriate testing mode (such as dry or wet), dispersion medium, and concentration parameters based on the characteristics of the sample. Different samples may require different dispersion conditions to achieve good results.

Set the required particle size range and resolution to ensure coverage of all particle size ranges of interest.

3、 Sample loading and dispersion

1. Dry dispersion

Place the dried sample into the sampler and start the equipment to allow the sample to enter the measurement area through airflow or other means. Pay attention to controlling the injection speed to avoid particle accumulation caused by too fast or affecting efficiency due to too slow. Adjust the air pressure or vibration frequency to optimize the particle dispersion effect, ensuring that each particle can independently pass through the beam without overlapping.

2. Wet dispersion

Add the sample to a solution containing an appropriate dispersant and use an ultrasonic oscillator or other means to thoroughly disperse the particles. Select appropriate dispersion time and power based on the properties of the sample to prevent particle breakage caused by excessive processing. The suspension is sent into the measuring cell through a peristaltic pump or other injection device, and a constant flow rate is maintained during this process to maintain stable testing conditions.

4、 Data Collection and Analysis

1. Data collection

After starting the measurement program, the system will automatically record the curve of the intensity of the light signal transmitted through the sample over time. This curve reflects the distribution of the number of particles with different particle sizes. Ensure that there are no external interference factors (such as vibration, temperature fluctuations, etc.) affecting data quality throughout the entire testing process.

2. Result analysis

Use supporting software to process the collected data and generate granularity distribution maps and related statistical indicators (such as D50, D90, etc.). These pieces of information can be used to evaluate the overall characteristics and uniformity of the sample. Compare historical data or reference standard values to determine the qualification of the current batch of products and provide a basis for subsequent process improvement.