Welcome to Bebur, The world-leading provider of water quality and gas detection solutions!

Tel

E-mail

Language





EN CN RU

back all

How to judge whether the measurement accuracy of the PCA particle charge analyzer meets the requirements?

Release time:2025.11.27

The following aspects can be used to judge whether the measurement accuracy of the PCA particle charge analyzer meets the requirements:

Accuracy index: Check the technical specifications provided by the instrument manufacturer to confirm the measurement accuracy value indicated. For example, the accuracy of a certain model of PCA particle charge analyzer is 0.1%. If the actual measurement accuracy is within this range, it can be basically considered that the accuracy meets the requirements.
Measurement range and resolution: Confirm whether the measurement range of the instrument covers the actual particle charge value range to be measured, and check whether the resolution is high enough to meet the measurement requirements for small charge changes. For example, if a charge change of 0.1mV needs to be measured, and the instrument resolution is 1mV, it cannot be accurately measured.

Use standard substances: Obtain standard samples with known charge properties, such as colloidal particle solutions with standard charge density or standard substances with precise charge values. Use the PCA particle charge analyzer to be tested to measure the standard sample multiple times and compare the measurement results with the known values of the standard sample.
Calculate the error: Calculate the measurement error, such as absolute error, relative error or standard deviation, based on the measurement results. Generally speaking, if the relative error is within the instrument accuracy specification and the standard deviation is small, it means that the instrument has high accuracy. For example, if the charge value of the standard sample is 100mV, the instrument measurement result is between 99.5mV and 100.5mV, and the relative error is within ±0.5%, it can be considered that the accuracy is good.

Select comparison instrument: Select a widely recognized, known and reliable particle charge analyzer of the same type or other instrument for measuring particle charge as the comparison instrument. Ensure that the accuracy of the comparison instrument is higher than or at least equivalent to that of the instrument to be tested, and that it has been calibrated and verified.
Synchronous measurement and result comparison: Under the same measurement conditions, use the PCA particle charge analyzer to be tested and the comparison instrument to measure the same sample multiple times at the same time. Compare the measurement results of the two instruments and calculate the difference and relative deviation. If the difference and relative deviation are within the acceptable range, it means that the accuracy of the instrument to be tested meets the requirements. For example, if the measurement result of the comparison instrument is 50mV, the measurement result of the instrument to be tested is between 49.5mV and 50.5mV, and the relative deviation is within ±1%, it can be considered that the accuracy of the instrument to be tested basically meets the requirements.

Repeatability test: Under the same measurement conditions, use the same PCA particle charge analyzer to measure the same sample multiple times, generally not less than 6 times. Calculate the standard deviation or coefficient of variation of the measurement results. If the value is small, it means that the instrument has good repeatability and reliable accuracy. For example, if the standard deviation of multiple measurement results is less than 0.5mV, it means that the instrument has high repeatability accuracy.
Reproducibility test: Different operators use the same PCA particle charge analyzer to measure the same sample at different times and under different environmental conditions, or use multiple instruments of the same model to measure the same sample. Compare the measurement results of different operators or different instruments. If the results are consistent, it means that the instrument has good reproducibility and meets the requirements.

Collecting actual samples: Collect representative actual samples that cover various types and charge ranges of particles that the instrument may encounter in actual use. For example, in the field of water treatment, collect water samples from different sources and at different stages of treatment; in the papermaking industry, collect different pulp samples, etc.
Measurement and result evaluation: Use the PCA particle charge analyzer to measure actual samples and compare the measurement results with previous empirical data, measurement results of other reliable methods, or expected values. If the measurement results are consistent with the known reference value or expected value and are within a reasonable error range, it means that the accuracy of the instrument in actual application meets the requirements.

SEO Powered by CEglobal

中企跨境-全域组件 1.70 制作前进入CSS配置样式

导航下拉添加类名.active

在线客服添加返回顶部

右侧在线客服样式 1,2,3 1

图片alt标题设置： Bebur

表单验证提示文本： Content cannot be empty!

循环体没有内容时： Sorry,no matching items were found.

CSS / JS 文件放置地