HOME Cart(0) Quotation About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (18 Oct 2025)

JJF 1562-2016 English PDF

US$419.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1562-2016: Calibration Specification for Condensation Particle Counters
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1562-2016	English	419	Add to Cart	4 days [Need to translate]	Calibration Specification for Condensation Particle Counters	Valid	JJF 1562-2016

PDF similar to JJF 1562-2016

Standard similar to JJF 1562-2016

JJF 1424 JJF 1441 JJF 1363 JJF 1565 JJF 1567 JJF 1563

Basic data

Standard ID	JJF 1562-2016 (JJF1562-2016)
Description (Translated English)	Calibration Specification for Condensation Particle Counters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A61
Classification of International Standard	17.020
Word Count Estimation	18,171
Date of Issue	2016-06-27
Date of Implementation	2016-09-27
Quoted Standard	ISO 15900-2009; ISO/DIS 27891
Regulation (derived from)	Notice of the General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China 2016 No.16
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to the calibration of condensed nuclear particle counters.

JJF 1562-2016: Calibration Specification for Condensation Particle Counters

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Metrology Technical Specifications of the People's Republic of China Calibration Specification for Condensation Nucleus Particle Counter 1 Scope This specification applies to the calibration of condensation nuclei particle counters. 2 References This specification references the following documents. ISO 15900.2009 Measurement of aerosol particle size distribution Differential electromigration method Calibration of aerosol particle number concentration condensation nuclei particle counters For dated references, only the dated version applies to this specification; for undated references document, its latest version (including all amendments) applies to this specification.

3 terms

3.1 Aerosols A dispersion of solid and/or liquid particles suspended in a gas. 3.2 Differential electromigration separator Aerosol particles can be selected and separated according to electrical mobility, and monodisperse samples can be obtained A separator, also known as electrostatic classifier. 3.3 Faraday cup aerosol electrometer An electrometer used to measure the charge concentration carried by aerosol particles, referred to as aerosol electrometer (AE). 3.4 Particle number concentration The number of particles in a unit volume of gas.

4 Overview

Condensation nuclei particle counter (abbreviated as CPC in this specification) is mainly composed of saturation chamber, condensation chamber, optical detector (laser beam, prism, detection cavity, detector) and flow control system are composed of four parts. Figure 1 is a simplified structure diagram of CPC. The working principle of CPC is. when the aerosol passes through the saturated cavity and the condensation cavity, due to the condensation of the supersaturated vapor of the working fluid on the particle surface, The particle size will increase accordingly. When it flows through the laser detection area at a certain speed, by measuring the scattered light signal of the particle per unit time, The particle number concentration in the aerosol is calculated. The working fluid in the saturation chamber is usually n-butanol, isopropanol or water.

5 Metrological characteristics

The measurement characteristics of CPC are shown in Table 1, and the performance indicators are for reference during calibration.

6 Calibration conditions

6.1 Environmental conditions 6.1.1 Ambient temperature. (18~30)℃; 6.1.2 Relative humidity. 20%~80%; 6.1.3 Laboratory cleanliness. no less than 10,000 class clean room or clean area; 6.1.4 Others. Keep away from vibration, electromagnetic interference, and avoid direct sunlight. 6.2 Calibration standards and other equipment 6.2.1 Calibration device for condensation nuclei particle counter. particle concentration range (50~10000) pieces/cm3, particle concentration The uncertainty of the calibration result is better than 3.5% (k=2). Please refer to Appendix A for the principle and composition. 6.2.2 Particle size standard material. National certified standard material should be used, and the average particle size should be in the range of (80~120)nm Within, the relative uncertainty of the average particle size is not more than 10% (k=2). 6.2.3 Soap film flowmeter. measuring range (50~5000) mL/min, accuracy grade not lower than 1.5.

7 Calibration items and calibration methods

Calibration items can be selected according to the intended use of the instrument being calibrated. Deviations from the calibration specifications shall be noted in the calibration certificate. 7.1 Zero point Connect the high-efficiency filter (the filtration efficiency of particles not smaller than 0.1μm is better than 99.99%) to the gas of CPC At the entrance of the sol, and run continuously for more than 5 minutes. Afterwards, 30 measured values C0i are recorded. 7.2 Flow indication error 7.2.1 For the CPC with adjustable flow, select 2 flow values near 1/3 and 2/3 of the flow range as calibration For a CPC with a fixed flow rate, this flow value is selected as the calibration point. 7.2.2 Connect the soap film flowmeter to the inlet of the CPC, read the three measured values of the soap film flowmeter, and calculate the Mean · Q1.Calculate the sampling flow error of CPC according to formula (2), and take the ΔQ with the largest absolute value as the flow indication error. 7.3 Flow stability 7.3.1 For the CPC with adjustable flow rate, select the value near the middle flow rate as the calibration point, and for the CPC with fixed flow rate CPC, choose this flow value as the calibration point. 7.3.2 Connect the soap film flowmeter to the inlet of the CPC, record the reading of the soap film flowmeter after the instrument is stable, and then Run continuously for 15 minutes without adjusting the flow rate, record the readings of the soap film flowmeter every 3 minutes, a total of 6 times, according to the formula 7.4 Particle counting efficiency 7.4.1 Connect the calibration device according to Appendix A. Use an aerosol generator to atomize the particle size standard substance and dry it by diffusion Monodisperse aerosol particle samples were obtained after drying, aerosol neutralizer and differential electromigration separator. By adjusting the granularity Standard substance concentration, adjust the flow of clean compressed air and aerosol generator, transfer the differential electromigration separator outlet The particle concentration is controlled around 7000/cm3. 7.4.2 By adjusting the dilution ratio f of the aerosol diluter, control the measured value of CPC at (50~100) pieces/cm3, (200~400)pcs/cm3, (500~1000)pcs/cm3, (2000~3000)pcs/cm3 and (6000~ 7000) pieces/cm3 range. At each concentration, the measurement results of CPC and FCAE were recorded within 30 s, and a total of Count 3 times, and calculate the average CCPC and CFCAE of the 3 measurement results. 7.4.3 Calculate the particle counting efficiency of the condensation nuclei particle counter at different concentrations according to the formula (4). 7.5 Particle count repeatability 7.5.1 According to the method in 7.4.1, control the particle concentration at the outlet of the differential electromigration separator to around 7000 particles/cm3. 7.5.2 After the CPC stabilizes, calculate the average value of the CPC within 10s, denoted as Ci. Repeat the above measurements 10 times, according to formula (5) to calculate the repeatability of particle number concentration measurement.

8 Calibration result expression

Calibration results shall be reflected on the calibration certificate. Calibration certificates should include the following information. a) Title. "Calibration Certificate"; b) laboratory name and address; c) the location where the calibration is performed; d) Identification of calibration certificate number, page number and total number of pages; e) customer name and address; f) The manufacturer, name, model and serial number of the instrument being calibrated; g) Special seal for calibration of calibration units; h) date of calibration; i) The name and code of the technical specification on which the calibration is based; j) The name, model, accuracy grade or uncertainty of the certified reference material used in this calibration and the main measuring equipment Degree or maximum allowable error, instrument number, certificate number and validity period; k) Ambient temperature and relative humidity during calibration; l) Calibration results and their measurement uncertainties; m) a description of the deviation from the calibration specification (if any); n) recommendations for recalibration intervals; o) The signature and issue date of the calibrators, verifiers and approvers of the "Calibration Certificate"; p) A statement that the calibration result is only valid for the current measurement of the instrument being calibrated; q) Statements that partial reproductions of certificates or reports are invalid without the written approval of the laboratory.

9 Recalibration interval

The recalibration interval of CPC is recommended to be 1 year. Since the length of the recalibration interval is determined by the use of the instrument, It is determined by various factors such as the user and the quality of the instrument itself. Therefore, the sending unit can independently determine the time interval for recalibration according to the actual use.

Appendix A

Condensation nuclei particle counter calibration device A.1 Composition and working principle In this specification, the calibration of the CPC counting efficiency is completed by comparing with the calibrated FCAE. calibration device It mainly includes aerosol generator, differential electromigration separator, aerosol diluter, FCAE, etc., as shown in Figure A.1. The working principle of the calibration device is. the clean compressed air filtered by the high-efficiency filter enters the aerosol generator Finally, atomize the monodisperse polystyrene latex standard particles in the device. The generated aerosol particles pass through the particle neutralizer After reaching the Boltzmann charge balance, and then passing through the differential electromigration separator, a single component with a single charge on the surface is finally produced. scattered aerosol particles. Through technical means such as dilution, supplementary clean air, and air extraction, the air in each channel of the aerosol splitter The particle concentration of the particle reaches a dynamic equilibrium, and flows through the FCAE and the CPC to be calibrated at a specific flow rate. will CPC's The measured value is compared with the standard value (Equation 4 in 7.4.3), thus realizing the calibration of the CPC counting efficiency. A.2 Calibration device performance index Condensation nuclei particle counter calibration device. particle concentration calibration range (50~10000)/cm3, particle concentration The calibration uncertainty is better than 3.5% (k=2). The main performance indicators are listed in A.2.1~A.2.7 respectively. A.2.1 Aerosol generators Using the spray principle, it can atomize polystyrene standard particles with a particle size in the range of (50~150)nm; and The concentration of aerosol particles is stable and adjustable, and the maximum concentration should not be lower than 40,000 particles/cm3, and the stability within 5 minutes is better than 1%. A.2.2 Compressed air The maximum flow rate is at least 100L/min, and the number of particles with a particle size of not less than 0.1μm should not exceed 10/L. A.2.3 Diffusion dryer The maximum flow rate is at least 3L/min, and the relative humidity of the dried aerosol should not be higher than 40%. A.2.4 Differential electromigration separator In the range of (50~500)nm, aerosol particles can be selected and separated according to their electric mobility, and several Any monodisperse sample with a standard deviation (GSD) less than 1.1.In the calibration certificate, p charges are carried in the aerosol (p=1,2,3) The relative standard uncertainty of the percentage of particles is better than 0.7%. A.2.5 Aerosol diverters Should have at least 2 airflow channels. In the calibration certificate, the relative standard uncertainty of the particle concentration deviation of each channel is better than 0.9%. A.2.6 Aerosol diluters The dilution ratio is adjustable in the range of (2~100) times. In the calibration certificate, the relative standard uncertainty of the dilution ratio is better than 0.8%. A.2.7 FCAE It can measure the number concentration of particles in the range of (3000~8000)/cm3.In the calibration certificate, FCAE counts The relative standard uncertainty of efficiency is better than 1.0%.

Appendix B

An Example of Uncertainty Evaluation of Particle Counting Efficiency Calibration B.1 Brief description of calibration method and measurement model Calibrate the particle counting efficiency of the instrument according to 7.4 of this specification. Calculate the counting efficiency of the instrument according to formula (B.1). B.2 Uncertainty calculation formula From the formula (B.1), it can be seen that the main factors affecting the uncertainty of measurement results are. CPC measurement results, FCAE measurement results, aerosol diverter channel deviation, aerosol diluter dilution ratio, FCAE counting effect rate, multi-charge effect correction. Uncertainty calculation formula can be derived from formula (B.1). B.3 Evaluation and calculation of uncertainty components B.3.1 Uncertainty components introduced by CCPC in CPC measurement results According to section 7.4.2 of this specification, the measurement result of CPC is the average value of three measurement results, and the measurement results are shown in Table B.1. B.3.2 Uncertainty introduced by aerosol diverter bias β Calibrated by the national legal metrological verification institution, the channel deviation β of the aerosol splitter is 0.9995 B.3.3 Uncertainty introduced by the dilution factor f Calibrated by the national legal metrological verification institution, within the range of (2~100) times dilution ratio, the relative standard of the dilution factor The quasi-uncertainty ur (f) = 0.60%. B.3.4 Uncertainty introduced by CFCAE in FCAE measurement results According to 7.4.2 of this specification, the measurement result of FCAE is the average value of three measurement results, and the measurement results are shown in Table B.2. B.3.5 Uncertainty introduced by FCAE counting efficiency ηFCAE Calibrated by the national legal metrological verification institution, within the range of (10~20) fA [corresponding particle concentration range is about The counting efficiency ηFCAE of (3700~7400) pieces/cm3]FCAE is 99.01%, and the relative standard introduced by calibration Uncertainty ur (ηFCAE) = 0.79%. B.3.6 Uncertainties introduced by multiple charge effects Calibrated by the National Statutory Metrology and Verification Institute, the relative standard uncertainty introduced by the calibration of multiple charge effects B.4 Standard uncertainty In summary, the standard uncertainty of the CPC counting efficiency B.5 Expanded uncertainty The relative uncertainty of this calibration result

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1562-2016_English be delivered?

Answer: Upon your order, we will start to translate JJF 1562-2016_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1562-2016_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1562-2016_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.