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JJF 1843-2020 English PDF

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JJF 1843-2020: Calibration Specification for SAR Testing Systems
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1843-2020	English	599	Add to Cart	5 days [Need to translate]	Calibration Specification for SAR Testing Systems	Valid	JJF 1843-2020

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Basic data

Standard ID	JJF 1843-2020 (JJF1843-2020)
Description (Translated English)	Calibration Specification for SAR Testing Systems
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A56
Word Count Estimation	26,263
Date of Issue	2020-07-02
Date of Implementation	2021-01-02
Regulation (derived from)	Announcement No. 29 (2020) of the State Administration for Market Regulation
Issuing agency(ies)	State Administration for Market Regulation

JJF 1843-2020: Calibration Specification for SAR Testing Systems

---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.
(Calibration Specification for Radio Frequency Electromagnetic Field Exposure Specific Absorption Rate (SAR) Meter) National Metrology Technical Specifications of the People's Republic of China Radio frequency electromagnetic field exposure specific absorption rate (SAR) Calibration Specification for Measuring Instruments 2020-07-02 released 2021-01-02 implementation Issued by the State Administration for Market Regulation Specific Absorption Rate of Radio Frequency Electromagnetic Field Exposure (SAR) Measuring instrument calibration specification Focal point. National Radio Metrology Technical Committee Main drafting unit. China Institute of Metrology Shenzhen Institute of Metrology and Quality Inspection Participating in the drafting unit. China Academy of Information and Communications Technology This specification entrusts the National Radio Measurement Technical Committee to be responsible for the interpretation The main drafters of this specification. Wu Tong (China Institute of Metrology) Lin Bin (Shenzhen Institute of Metrology and Quality Inspection) Shen Qingfei (China Institute of Metrology) Participating drafters. Qi Dianyuan (China Academy of Information and Communications Technology) Lin Yixiang (Shenzhen Institute of Metrology and Quality Inspection)

Introduction (Ⅱ) 1 Scope (1) 2 Reference documents (1) 3 Terms and units of measurement (1) 3.1 Specific absorption rate (1) 3.2 Conversion factors in air ducts (2) 3.3 Conversion factor in dielectric waveguide (2) 3.4 Linearity (2) 4 Overview (2) 5 Measurement characteristics (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment (3) 7 Calibration items and calibration methods (4) 7.1 Calibration items (4) 7.2 Calibration method (4) 8 Calibration result expression (8) 9 Re-calibration interval (8) Appendix A Original Record Format (9) Appendix B Format of the inner page of the calibration certificate (11) Appendix C Examples of Evaluation of Calibration Uncertainty for Major Items (12) Appendix D Calculation of Conversion Factors and Boundary Condition Parameters in Liquid Waveguides (15) Appendix E Calculation of conversion factor in air duct (17) Appendix F List of standard parameters of tissue fluid (18) Appendix G Standard Dimensions of Dipole Antenna (19)

Introduction

This specification is based on JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications" and JJF 1059.1-2012 The requirements in "Evaluation and Expression of Measurement Uncertainty" shall be compiled. The specification quoted IEC 62209-1 (2011-02) "Handheld and body-worn wireless communication equipment to human Electromagnetic radiation of the human body. Human body models, instruments and procedures. Part 1.Hand-held wireless communication devices used close to the ear SAR Evaluation Regulations (Frequency Range 300MHz~6GHz)". This specification is released for the first time. Radio frequency electromagnetic field exposure specific absorption rate (SAR) Calibration Specification for Measuring Instruments

1 Scope

This specification applies to the working frequency range of 800MHz~5.8GHz, the specific absorption rate measurement range is 0.01W/kg~ Calibration of 100.0W/kg specific absorption rate probe.

2 Reference documents

The following documents are cited in this specification. GB/T 11450.2-1989 Hollow Metal Waveguide Part 2.Relevant Specifications for Ordinary Rectangular Waveguide IEC 62209-1 (2011-02) Electromagnetic radiation of handheld and body-worn wireless communication devices to the human body Radiographic models, instruments and procedures. Part 1.SAR of handheld wireless communication devices used close to the ear Evaluation procedures (frequency range 300MHz~6GHz) [Humanexposuretoradiofrequencyfieldsfrom hand-heldandbody-mountedwirelesscommunicationdevices-Humanmodels,instru- mentation,andprocedures-Part 1.Proceduretodeterminethespecificabsorptionrate (SAR)fordevicesusednexttotheear(frequencyrangeof300MHzto6GHz)] For dated reference documents, only the dated version applies to this specification; for all undated references The latest version (including all amendments) is applicable to this specification.

3 Terms and units of measurement

The following terms and measurement units apply to this specification. 3.1 Specific absorption rate; SAR The energy microelement absorbed (consumed) by the mass microelement (dm) within the volume microelement (dV) of a given density (ρ) (dW) Differential value with respect to time. The symbol is SAR. SAR= dt dW dm ÷= dt dW ρdV ÷ (1) SAR can also be obtained by any of the following formulas. SAR= σE2 (2) SAR=ch dT dt t=0 (3) Where. SAR---specific absorption rate, W/kg; σ---Medium conductivity, S/m; E---the effective value of the electric field intensity in the tissue simulation fluid, V/m; ρ---Tissue density, kg/m3; ch---specific heat capacity of tissue, J/(kg·K);

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