为分析巴歇尔槽明渠流量计的测量能力，利用实验室明渠流速流量标准装置对4#、5#标准巴歇尔槽进行了测试。试验结果显示，随着流量的增加两种型号巴歇尔槽明渠流量计的示值误差均由负转正，且最大示值误差在±3%以内。由此得出巴歇尔槽明渠流量计测量能力能够满足JJG711-1990的要求，适应于明渠流量计量，同时可以根据试验结果进行示值误差定点修正，进一步提高流量计的测量能力。

Polymerase chain reaction(PCR) technology has been widely applied in fields such as life sciences, food testing, environmental protection, etc. With the development of PCR technology, the demand for precise control of PCR analyzers in different scientific research and detection work is increasing. In order to ensure the accuracy and reliability of PCR instrument values, various calibration methods have been released. This paper provides an overview of typical PCR technology and the progress of PCR instrument calibration methods, and looks forward to the future development direction of PCR technology.

This paper describes how to calibrate all kinds of fixed line displacement sensors used in the field by selecting the standard measuring block of grade 4 (or grade 5 accuracy) and self-made fixture. Through online calibration, it can eliminate the risk of system error of the whole machine caused by only sending the sensor, and greatly reduce the labor cost, time cost and damage to the sensor caused by regular disassembly and assembly, so as to achieve the real sense of the whole machine system calibration, so that the obtained measurement value is more reflective of the technical performance of the whole machine, more accurately measure the system error of the whole machine, and meet the process requirements. Improve the level and ability of online detection of measuring equipment. Through comparative analysis of several cycles of experimental data, the reliability and accuracy of the calibration method are verified, which provides a reference for online calibration of other measuring instruments.

Liquid chromatograph is an indispensable equipment in the process of inspection, analysis and research of pharmaceutical companies[1]. It has the characteristics of high resolution, high sensitivity, fast analysis speed and good repeatability. In order to use the measuring instrument correctly and ensure the accuracy and reliability of the calibration results, the measurement standard of the liquid chromatometer verification device is established. Only by starting with standardization and full participation can we create a competitive advantage in the market and realize the sustainable development of the enterprise. This paper introduces how to establish the measurement standard of the enterprise's internal liquid chromatograph verification device through the composition of the measurement standard, the main technical indicators, the measurement standard's measurement value traceability and transfer block diagram, the measurement repeatability assessment and the uncertainty assessment, etc., combined with the "measurement standard assessment Code"[2] and "Verification Regulation of liquid chromatograph"[3].

摘要：三维面积测量仪，又称3D面积测量仪。采用新型的非接触光学测量技术；实现对复杂物体的快速面积计算、体积计算、尺寸计算以及数据输出等。利用表面积测量在食品安全、检测检疫、法院鉴定、医疗诊断等领域有广泛的应用，三维面积测量仪为实用于快速、准确地计算不规则物体的面积，包括任意面积、表面积、体积等，由于没有相对应的计量规程规范。本文探讨了三维面积测量仪的计量校准方法。

A calibration method by solid density standards is proposed to address the current situation where solid densimeters can only be calibrated using JJG999 in liquid mode. The expanded uncertainty obtained through uncertainty evaluation is U=0.0016g?cm-3（k=2）, which meets the requirements for traceability of measurement values and provides a convenient and effective method for the calibration of solid densimeters.

Abstract: Water mist has a strong attenuation effect on infrared radiation. In this paper, the paper briefly describes the attenuation characteristics of water mist on infrared spectrum, describes and analyzes the energy changes of infrared spectrum radiation absorbed and scattered by water mist in the process of radiation transmission by Lambert-Beer law. At the same time, the scattering coefficient and extinction coefficient of water mist particles are calculated by means of Mi scattering theory, and the influence of other factors in the path radiation process is considered. The shielding and attenuation characteristics of water mist to infrared radiation energy are explained by testing and evaluating. In the laboratory environment, the water mist environment is simulated, the attenuation characteristics of infrared radiation are analyzed, and the water mist model is established. The correction factor of infrared radiation attenuation was obtained by using Lamberbier's law, and the correction factor was added to the non-contact infrared temperature measurement system for real-time temperature correction. The research shows that the precision of non-contact infrared temperature measurement system can be improved effectively by introducing correction factors.

Organic high-resolution fan-shaped magnetic field mass spectrometers, which have specific advantages in detecting samples such as polychlorinated biphenyls and dioxins, are mostly calibrated based on gas chromatography-mass spectrometry due to the lack of technical specifications and other metrological documents, so their instrument performance was ineffective. In recent years, with the implementation of JJF1930-2021 "Calibration Specification for Organic High Resolution Fan Magnetic Field Mass Spectrometers", more and more fan magnetic field mass spectrometers have been metered. This article mainly elaborates and analyzes the situations encountered when measuring instruments, and provides some corresponding solutions.

The article mainly analyzes the reasons for poor sealing performance of pipettes based on factors such as the usage environment, personnel operation, maintenance, etc., combined with the design structure and working principle of pipettes. Then, starting from the equipment and verification methods used to verify the sealing performance of pipettes, new ideas are proposed to improve the sealing performance of pipettes. The aim is to enable customers or verification institutions to quickly and effectively verify the sealing performance of pipettes And accurately complete the sealing verification of the pipette.

The nanovoltmeter has the advantages of low noise and zero drift, and is used for measuring small voltage signals, such as measuring low potential scanning switches, thermocouples, etc. , there is no national technical standard for the traceability of voltmeters. This paper discusses the traceability of nanovoltmeter by standard source method, standard divider method and current-voltage conversion method.

Abstract：The uniformity of radon volume activity in a radon chamber is an important indicator for evaluating its performance and a significant factor affecting the uncertainty of the calibration results of radon meters. In this experiment, a standard radon meter was used to measure the uniformity of radon volume activity at different sampling points in the sampling area of the radon chamber. Due to the long measurement time required for uniformity testing, the stability of the radon chamber during this period will also have an impact on the test results. Therefore, the stability of the sampling center area was also tested under the same measurement period, and the experimental results of stability and uniformity were compared and studied. The experimental results show that the 8-hour stability of HD-6 radon chamber meets the requirement of better than 5% in the calibration regulations; When the measurement period is 3 hours, the standard deviation of the stability measurement result is 1.03%, and the standard deviation of the uniformity measurement result is 1.30%. The two are very close, indicating that the influence of using different sampling ports on the measurement results can be ignored, and the uniformity of the radon chamber sampling area is good.

Currently,there is no veritification calibration backgrounds and illumination requirements for the common uesd working glass container,However,during routine calibration and comparisons of working glass container,it has been observed that the calibration background and illumination have a significantly impact on the measured capacity values of common used working glass.Through studies involving capacity determination and visual fatigue assessment of 100mL sigle line volumetric flasks under different calibration backgrounds and illuminance,it has been determined that when calibrating working glass container,utilizing the natural light source (or white) background along with black shield or black cloth curtain,so that black background is below the marking lines and the natural light source (or white) background is above the marking lines,resulting in accurate and reliable measurement data.Further visual fatigue trials indicate that the suitable range of illumination during the calibration of common used working glass container is (400 to 2500) lux.

气体超声流量计在实流检定站安装条件下的流动剖面修正系数和现场安装条件下的偏移量，可能导致精度误差范围超要求。采用计算流体力学仿真软件对一套非充分发展流条件下的实验装置进行建模仿真，通过对一台8声道交叉对射气体超声流量计的声道切换，实现3种声道组合的工作模式，用3种模式下的实验数据来验证仿真结果。研究结果表明：声道截面上的流速分布状态的仿真结果与实际分布状态基本一致，进一步对仿真结果进行量化，结合实验装置的数据，对不同安装条件下的误差偏移量，可以提供有价值的参考。

摘要：标准金属量器使用比较法进行检定，普遍效率较低，特别对于较大型量器，底阀控制不便捷，微调阀门控制标称液位受人为读数因素影响，对检定使用的恒温水箱储存水效率较低，本文提供了一种新的金属量器检定装置、检测系统和供水系统。通过对底部三通阀门和微调阀门的改进，对储存恒温水箱注水方式和保护方式进行了改进，根据上述改进方式，设计了一套完整的检测和控制系统。该系统对标准金属量器的标称液位进行准确控制，对恒温水箱自动注水进行了三层保护。通过试验表明：此控制系统符合国家检定规程的使用要求和准确度的要求，能够大幅度提高检定效率。

This paper takes the vertical metal can as the research object and adopts the whole station scanner as the main measuring equipment. The work flow and calculation process of the vertical metal tank deformation detection project are summarized in detail and verified. The practice shows that the method is effective and accurate for the deformation detection of the vertical metal tank, and provides a reliable basis for data visualization for the safe operation and deformation repair of the vertical metal tank.

Based on the problem of small diameter deviation found during the diameter detection process of the calibration ball of the coordinate measuring machine using the small flat measuring head of the length measuring instrument in actual work, research is carried out. By using three different probe combinations, namely ball probe+ball probe, flat probe+ball probe, and flat probe+flat probe, to calibrate the same calibration ball, it was found that the data of the first two probe combinations were basically consistent, while the measurement results of the two flat probe combinations were slightly smaller by 1.5 μm. After analyzing the reasons for the errors in the experimental results of the three probe combinations, it was determined that using a ball probe+ball probe is a relatively high accuracy measurement method.

本研究提供了一套基于智能识别技术的离线自动计量系统下，实现多系统交互的研究和应用。多系统主要包含6个，即：智能计量系统、过跨车一级（PLC）系统、称重二级系统、摄像机（SDK）系统、图像识别系统、中厚板PES系统。 系统交互主要包括智能计量系统与称重二级系统、过跨车一级系统与摄像机系统、图像识别系统与摄像机系统、图像识别系统与智能计量系统、摄像机系统与图像识别系统以及称重二级系统和中厚板PES系统等。系统间的交互方式主要分为两种，一是基于TCP/IP协议的Socket报文通信；二是基于消息中间件IBM-MQ、IX-BUS的电文通信。多个系统交互信息高效协同，建立了异常监测和处理机制，并完善了多进程、高并发的程序处理逻辑。多系统的高效协同系中厚板自动计量功能的核心，是实现整体流程的无人化的关键。本文将从多系统交互网络图、交互内容、交互方式等方面进行阐述。

Abstract:The water meter is a routine device used by consumers to measure the amount of tap water used, which has the main function of detecting water flow. It is also the main data basis for calculating water bills. In order to ensure the accuracy of water meter flow and maintain the working performance of the water meter, the water meter calibration work is responsible for checking the errors and accuracy of the water meter in daily work. It is an essential daily maintenance work that all water supply workers should pay great attention to. Therefore, accurate error analysis is necessary to reduce the error rate and accuracy of water meters. This article, based on personal experience, offers a small contribution to all water supply workers.

With the widespread application of vapor recovery system for fuel dispensers, higher requirements have been put forward for standard metal gauges used for calibrating refueling machines. By analyzing the structure of automobile fuel tanks, a standard gauge simulating the structure of fuel tanks was designed and manufactured. By comparing experimental data with ordinary gauges, the impact of this gauge on the indication error of fuel dispensers was compared. Suggestions were made for the standard gauge used by metrological verification institutions and enterprises for self inspection.

Thestudyoflow-concentrationchlorideionreferencematerialsisofgreatsignificanceinthefieldsofenvironmentalmonitoring,foodsafety,biomedicine,andmetrologicaltesting.Inthispaper,theresearchprogressanddevelopmenttrendoflow-concentrationchlorideionstandardmaterialsarereviewed.Itspreparationtechnology,characterizationmethodanduncertaintyassessmentsourcewereanalyzed,andthechallengesandfuturedirectionsforthedevelopmentoflow-concentrationchlorideionstandardmaterialswerediscussed

The testing of product sound power is related to the intensity of product radiated noise. Currently, a semi anechoic chamber is generally used as the testing environment for product sound power. However, due to the near-field effect of the semi anechoic chamber, measurement results may produce errors. In this article, the spherical surface method is used to envelop the sound source on a spherical surface with the sound source center as the spherical center. The surface sound pressure level measurement points are arranged according to the requirements of GB/T 6882, By setting up three circular brackets, it is possible to achieve 20 surface sound pressure level measurement points. Using a standard sound source as the verification object, the rationality of this method was verified by comparing the 1/3 octave sound power level measured with the standard sound source provided by the superior certificate, and the difference was within ± 1dB.

As an advanced measurement method, quantum metrology technology can achieve the accuracy that cannot be measured by classical metrology, and it can supplement the accuracy and stability defects caused by the standard quantum limit. In addition, the quantum effect and quantum phenomenon can be reproduced by the measurement unit, which can realize the quantum value transfer and traceability activities, and is obviously superior to the traditional measurement technology in terms of measurement accuracy, sensitivity and stability. However, due to the limitations of quantum technology, quantum metrology is still in the early stage of research, and a large number of theoretical and experimental techniques need to be developed to develop insurmountable scientific problems in quantum metrology. This paper reviews the research progress of quantum metrology technology, gives a comprehensive review of the development trends and trends of quantum metrology technology at home and abroad in recent years, discusses the challenges faced by quantum metrology technology in different application aspects and corresponding countermeasures around multiple parameters such as voltage, electric energy, Hall resistance, current and other relevant application examples. Finally, The future development direction of quantum metrology technology is prospected. The continuous improvement of quantum metrology technology will continue to promote the development of metrology standards.

Abstract: The current pressure gauge delivery metrology process is divided into metrological testing organisations and metrological service recipients, depending on who is driving the process. The whole process from the pressure gauge from the enterprise application to send to metrological testing organisations to send back to the original location of the pressure gauge disassembly, each link may occur pressure gauge measurement failure, the whole process due to failure and the need for risk management. Through the use of PFMEA management tools, the risk elements in the whole process of multi-principal measurement are decomposed, identified and analysed, and scientific and reasonable countermeasures are proposed to reduce the risk of failure of the two main parties in the process of pressure gauge measurement.

Intheprocessofdrugproduction,inordertoensurethequalityofproducts,thecontrolparametersofeachprocess(especiallythecriticalprocessparameters)areparticularlyimportant.Theprocessvalidationoftheproductandtheperformancequalificationoftheequipmentarecarriedoutaroundthecontrolparametersoftheproduct.Therefore,themanagementofmeasuringinstrumentsrelatedtodrugproductionisanimportantpartofdrugproduction.ThispaperdiscussestheimplementationmethodofcalibrationmanagementinlinewithinternationalGMPrequirementsbycomparingtherequirementsofGMPoncalibrationmanagement,instrumentclassification,acceptancecriteriaandlifecyclesetting,soastoprovidereferenceforthecalibrationmanagementofpharmaceuticalmanufacturers.

As an important economic pillar of the country, the industrial economy has always been a top priority in China's economic development. Industrial collaboration, green and low-carbon, promotes high-quality development of the digital economy, becoming a key path for Chinese style development, and measurement plays a powerful role in promoting the steady growth of China's industrial economy. The article first analyzes the characteristics and roles of measurement in different periods of industrial economic development in China, with a focus on explaining the characteristics of the current era of digital measurement and dual carbon measurement; Secondly, explore the boosting effect of metrological technology innovation on the development of China's industrial economy; Finally, countermeasures and suggestions are proposed on how to respond to the development of green, low-carbon, and digital economy in the future, promote the deep integration of measurement and industrial economy, establish and improve the "dual carbon" measurement system.

The medical intra-oral X-ray imaging system is the necessary equipment for the clinical diagnosis of dental diseases. If the performance of the medical intra-oral X-ray imaging system is not reliable, it will seriously affect the doctor's diagnosis and treatment of patients, at present, there are no relevant regulations and specifications in our country and every province. Through the introduction of the main composition, working principle and standard equipment of the medical intra-oral X-ray imaging system, according to the related literature and the actual demand of the instrument detection, in this paper, 8 items are identified as the detection items of medical intra-oral X-ray imaging system. The test results are verified to meet the expected requirements. It is proved that the detection method is feasible and can evaluate the performance of a medical intra-oral X-ray imaging system scientifically and reasonably, and improve the reliability of the medical intra-oral X-ray imaging system.

Centrifugal blood component separator is widely used in clinical practice, and the accuracy of its parameters directly affect the health and safety of patients. According to industry standards and equipment technical principles, it can determine the main measurement characteristics in metrology and specific calibration methods, and then select products of representative brand for verification. Finally, the measurement characteristics of the centrifugal blood component separator are verified according to the calibration method, and the verification results meet the requirements of the determined measurement characteristics. The development of this calibration specification can provide a technical basis for the traceability of the measurement value of the centrifugal blood component separator

针对目前活塞式压力计检定工作中多个项目还使用较为传统的方法，使得活塞式压力计检定的效率低、不确定因素较多的问题，本文提出研制一种活塞式压力计综合辅助检定装置。该装置基于图形化设计,包括温度测量模块、距离测量模块、数据采集模块、数据处理和导出等模块，各模块集成于装置中，通过上位机软件进行数据的分析处理，能够自动通过图形化实时监测活塞式压力计的运动状态和运动轨迹。该装置还可以在辅助检定工作后，准确有效的根据检定数据计算得到活塞式压力计专用砝码、活塞及其连接件质量，并且实现自动原始记录自动生成和导出，降低活塞式压力计检定的不确定度的同时提高工作效率。

新发布的膜式燃气表国家标准新增了循环周期法耐久性试验，同时对试验条件做了明确要求，本文介绍了一种正压法燃气表耐久性试验装置工作原理与结构，并按照新国标的要求完成了一个循环试验，同步采集燃气表试验过程中的气源容量压力变化、装置运行过程气体温度变化等参数并进行分析，试验结果表明该装置满足新国标耐久性试验的相关技术要求，能够开展膜式燃气表的耐久性试验。

Thecuttingefficiencyofparticulatemattercutterisanimportantconditiontoensurethemeasurementaccuracyofparticulatematter,soitisveryimportanttotestandevaluateitquickly,accuratelyandreliably.InviewofthelackofcuttingcharacteristicstestingdevicesandmethodsofPM10polydisperseaerosolcuttersinChina,thispaperbuildsaperformanceexperimentaldeviceofPM10cuttersbasedonthestaticchambermethodofpolydisperseaerosol.Inthissystem,theaerosolgeneratingdeviceisusedtogeneratedustpolydisperseparticles,andthestaticchamberdeviceisusedtomixthepolydisperseparticles.Thestaticboxstructure,samplingportandsamplingpipedesignwereoptimizedbysimulation,andtheparticlesweremeasuredbyaerodynamicparticlesizespectrometer.Atthesametime,thedeviceisusedtotesttheperformanceofdifferentprinciplesandtypesofPM10cuttersathomeandabroad,anditisverifiedthatthedevicehastheadvantagesofrapidmeasurement,stabilityandreliabilityinthecuttingcharacteristicsofPM10cutters.

由于数字化电能计量装置的测量规范不成熟、测量设备无标准，导致计量误差测量结果的精度较低，提出基于TDC的数字化电能计量远程校准及在线测量方法。根据数字化电能计量误差的影响因素，采用TDC测量电能计量的误差，并针对测量结果对数字化电能计量进行远程校准。实验结果表明，设计方法测量的数字化电能计量误差符合数字表计量精度的要求，证实了该方法的有效性。

Pressure parameters are important parameters in aircraft engine testing and verification, and their accuracy directly affects the evaluation of engine performance, which is an important basis for engine design. The traditional pressure calibration method has the problem of low efficiency and the risk of errors caused by manual readings. An automated calibration system integrating laboratory calibration devices was innovatively designed using the LabVIEW development platform. The system integrates multiple pressure control devices and data acquisition devices, greatly leveraging the intelligent value of the devices themselves and possessing good scalability. This system can achieve fully automatic calibration, automatically control pressure, collect data, calculate data, generate original records and reports, effectively improving the efficiency and reliability of laboratory pressure parameter calibration work. The graphical programming environment of LabVIEW plays a core role in achieving data collection, analysis, and processing.

Coke oven gas, also known as coke oven gas, is a by-product of the coking process, combustible components, belongs to the high calorific value of gas, so as fuel in the iron and steel industry is widely used in the ironmaking, steelmaking, rolling steel and other production of heating links, due to the characteristics of the coke oven gas production process, so that the coke oven gas composition contains a certain amount of residual tar, naphthalene, dust, water and other impurities, these impurities are very easy to form scale deposited in the bottom of the pipe, or the formation of hanging scale bonded to the inner pipe wall measurement, resulting in regular deformation of the internal cross-sectional area of the pipe, affecting the accuracy of the flow meter measurement data. The research direction of this paper excludes the influencing factors of the equipment itself and the measuring system, the research content is mainly for the influence of the dirty gas medium on the accuracy of the data, try to study the online detection means, analyse the data deviation, make the corrected data tend to be accurate and reliable, and can At the same time, this research also provides a new idea to solve similar problems in the same industry.

This article introduced the energy consumption distribution of rail transit and elaborated on the importance of energy conservation and emission reduction. The driving parameters and status of trains were introduced. The simulation calculation process and method of traction energy consumption of rail transit were studied. Based on the relationship between different driving parameters and traction energy consumption, simulation of corresponding parameter curves was carried out.

As a standard device for wind tunnels, the pitot tube and hotwire anemometer can interfere with the flow field. Due to its non-contact measurement and wide linear range, LDV has unique advantages for wind tunnel flow field and velocity measurement. Experiments were designed to investigate the influence of the number rate of tracer particles on the LDV velocity measurement results, and to compare the effects of different number rates of tracer particles at different velocity points on the measurement results. The experimental results show that when the number rate of particles is too low, it will bring large random errors, resulting in poor repeatability of the indicated value. To ensure the reliability of the measurement results, it is recommended that the number rate of particles be no less than 200Hz when using LDV as a standard device for wind tunnel velocity measurement.

The Coulter measurement method based on nanopore can measure particle size down to 100nm or even smaller，and this device can determinate size of biological particles. In this study, the standard polystyrene microspheres and astaxanthin are used to evaluate the particle size measurement results of the Coulter method based on nanopores. As a result, the data shows that the measurement error of standard microsphere particle size is better than ±5%, and the repeatability is better than 1%; for the measurement of astaxanthin, attention should be paid to the salt ion concentration of the sample's dilute solution and oscillation frequency changes of the pretreatment, which may cause sample damage and form large particles. These may result in the larger sample size and size distribution shifting. It should pay attention to the impact of the salt ion concentration of the diluent and sample pre-treatment conditions on the measurement error. The accuracy of the measurement results can be ensured by optimizing methods and processing techniques.

In the calibration process of traditional piston manometer, there are some problems such as poor stability of artificially adjusted weights and low verification (calibration) accuracy. This paper carried out optimization research on verification (calibration) method of piston manometer based on magnetic balance principle, and built a mass measurement device model based on magnetic balance principle. The calibration process of manually adding and reducing weights was replaced by weight gravity measurement under the state of magnet repulsion balance. The mathematical model relationship between the magnet spacing and the mass of equivalent calibration weights is established. By precisely controlling and adjusting the segment interval of the magnet spacing, the parameters of different resolution requirements are measured. The experimental results show that the measurement data of the designed and constructed device has good repeatability and stability, covering the mass calibration range from 10mg to 1000mg, the adjustment resolution of the micro-weight mass can reach 10mg, and the high precision measurement is realized, which provides a new idea for the optimization design of the verification (calibration) device of the piston pressure gauge.

In view of the shortcomings of the existing electric and pneumatic torque wrench calibration devices, such as low measurement accuracy and easy to produce side force influence, a calibration device for electric and pneumatic torque wrench with dual bearing structure is designed. The device includes the hardware part of the dual bearing support structure and the digital visualization operation software part. Based on the simplified model of simulated bolt, the double bearing structure is designed to offset the influence of lateral force. To ensure the strength requirements of the key components of the whole device, the measurement accuracy can reach 0.01Nm, and the maximum allowable error is ±1%. Through the test of common electric torque wrench, it is verified that the calibrating device has good practicability and reliability, and its metrological performance and function meet the requirements of calibration work. It is of great significance for the traceability of dynamic torque.

This research is aim at solving the problems of the traditional low detection efficiency，low speed and others. It exploits a high-efficiency, accurate and intelligent energy efficient testing system of electric storage water heater which uses modern sensor technology, high-reliable DAQ Card, solenoid valve control technology, stable industrial computer, Labview language, PID control technology and flow stabilization algorithm. The experiment proved that the measurement repeatability of device is better than the traditional manual detection device. Furthermore, the uncertainty of the measurements of assessment satisfies the demands promoted by technical spevifications for national supervision and inspection.

Light scattering airborne particle counter is mainly used to detect the concentration of suspended particulate matters in the air. Its resolution to particle size affects the accuracy of measurement in a great extent. The methods of metrological calibration for this performance index mainly refer to international standard ISO 21501-4:2018 and national calibration specification JJF 1190-2008 standard. However, the test methods, calculation procedure and evaluation limits to the ability of distinguishing particle size in these two standards are quite different, which cause great trouble to the personnel of instrument development, using and measurement. In this paper, targeted experimental tests were carried out according to the above two standards. Through the analysis of the experimental data, it is shown that ISO standard has higher requirements on particle size resolution but the testing method is complex, while JJF standard is relatively simple and easy to implement. In order to ensure the convenience and accuracy of the measurement, JJF test which improves the index requirement of particle size distribution error was adopted. Through further study, it is determined that the size distribution error of 0.6μm and 0.4μm can meet the requirements of JJF and ISO standards at the same time when the size distribution error is controlled within 10%. Through the actual detection application research, it is suggested that the particle counter with particle size distribution error in critical state should be avoided in the environment with high requirement of cleanliness.