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Position: Chinese Standard in English/GB/T 12190-2006
GB/T 12190-2006   Method for measuring the shielding effectiveness of electromagnetic shielding enclosures (English Version)
Standard No.: GB/T 12190-2006 Status:superseded remind me the status change

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Language:English File Format:PDF
Word Count: 13000 words Price(USD):320.0 remind me the price change

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Implemented on:2006-11-1 Delivery: via email in 1 business day
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Standard No.: GB/T 12190-2006
English Name: Method for measuring the shielding effectiveness of electromagnetic shielding enclosures
Chinese Name: 电磁屏蔽室屏蔽效能的测量方法
Chinese Classification: L06    Electromagnetic compatibility
Professional Classification: GB    National Standard
Issued by: AQSIQ
Issued on: 2006-3-6
Implemented on: 2006-11-1
Status: superseded
Superseded by:GB/T 12190-2021 Method for measuring the shielding effectiveness of electromagnetic shielding enclosures
Superseded on:2021-12-1
Superseding:GB/T 12190-1990 Measurement of shielding effectiveness of high-performance shielding enclosures
Language: English
File Format: PDF
Word Count: 13000 words
Price(USD): 320.0
Delivery: via email in 1 business day
1 Scope This standard provides procedures of measurement and calculation for shielding effectiveness of electromagnetic (EM) shielding enclosure whose each side is not smaller than 2.0. The standard is applicable to electromagnetic shielding enclosures at frequencies from 9 kHz to 18 GHz and as necessary, such frequencies may be extendable down to 50 Hz and up to 100 GHz. If a shielding enclosure is used as fully-anechoic enclosure or semi-anechoic enclosure, its measurement for shielding effectiveness shall be conducted before the absorbing materials are mounted. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these labels are applied or not. For undated references, the latest edition of the normative document referred to applies. GB/T 4365-2003 Electrotechnical terminology - Electromagnetic compatibility (idt IEC 60050 (161): 1990) 3 Terms and Definitions For the purpose of this standard, the terms and definitions defined GB/T GB/T 4365-2003 and the following ones apply. 3.1 dynamic range (DR) The range of amplitudes over which the receive system operates linearly (see B.6). If the signal amplitude is expressed by decibel (dB), the dynamic range is the difference between the maximum and minimum signal levels. For a measurement, the DR depends on the difference between the reference level and the minimum discernable signal above the noise floor. This should be verified during the DR validation step defined in 4.4. It represents the maximum SE measurable at that frequency with that particular equipment and settings. 3.2 shielding enclosure A structure that protects its interior from the effect of an exterior electric or magnetic field, or, conversely, protects the surrounding environment from the effect of an interior electric or magnetic field. It is normally constructed of metal with provisions for continuous electrical contact between adjoining panels, including doors. A high-performance shielding enclosure is generally capable of reducing the effects of both electric and magnetic field strengths by one to seven orders of magnitude depending upon frequency. 3.3 shielding effectiveness (SE) The ratio of the signal received (from a transmitter) without the shield, to the signal received inside the shield; the insertion loss when the shield is placed between the transmit antenna and the receiving antenna. 3.4 local source An emitter located close enough to a shielding enclosure for its electromagnetic energy to illuminate only a localized portion of a shielding face. 3.5 owner The individual, corporation, or organization that intends to use the shield and that is the ultimate source of the shielding requirement. 3.6 testing agency The organization that actually performs the tests and records the data. 4 Preliminary procedures 4.1 Preparation Reference level and dynamic range shall be measured before formal measurement. 4.2 Test plan
Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Preliminary procedures 4.1 Preparation 4.2 Test plan 4.3 Calibration 4.4 Reference level and dynamic range 4.5 Preliminary shield check procedures 4.6 Warning 5 Detailed procedure of measurement 5.1 Background 5.2 Recommended typical measurement frequencies 5.3 Criteria 5.4 Shielding effectiveness calculation 5.5 Preparation procedures 5.6 Low-frequency measurements: 9 kHz to 20 MHz 5.7 Resonant range measurements: 20 MHz to 300 MHz 5.8 High range measurement: 300 MHz ~ 18 GHz 6 Testing report Annex A (Informative) Rationale A. 1 Basis A.2 Considerations A. 3 Cavity resonances A. 4 Measurement locations A. 5 Measurement equipment Annex B (Informative) Mathematical formulas B.1 Specific mathematical formulas B.2 Low range (50 Hz to 20 MHz) shielding effectiveness B.3 Resonant range (20 MHz~300 MHz) shielding effectiveness B.4 High range (300 MHz to 100 GHz) shielding effectiveness B.5 Nonlinear (logarithmic) calculations B.6 Dynamic range considerations Annex C (Informative) Miscellaneous supporting information C.1 Coplanar versus coaxial loops C.2 Nonlinearity of high-permeability ferromagnetic enclosures C.3 Selecting measurement frequencies Annex D (Informative) Guidelines for the selection of measurement techniques D.1 Types of enclosures D.2 Performance requirement D.3 Equipment requirements Annex E (Informative) Preliminary measurements and repairs E.1 Preparation E.2 Frequencies for preliminary check E.3 Preliminary check procedures
Referred in GB/T 12190-2006:
*GB/T 4365-2003 Electrotechnical terminology--Electromagnetic compatibility
GB/T 12190-2006 is referred in:
* GB/T 2887-2011 General specification for computer field
* GB/T 2887-2011 General specification for computer field
* GB 50462-2015 Code for construction and acceptance of data center infrastructure
*GB/T 26775-2011 General technical specification for audio video system on board
*GB/T 35590-2017 Information technology―General specification for portable digital equipments used power bank
*GB/T 20851.5-2019 Electronic toll collection—Dedicated short range communication—Part 5:Test methods of the main parameters in physical layer
Code of China
Standard
GB/T 12190-2006  Method for measuring the shielding effectiveness of electromagnetic shielding enclosures (English Version)
Standard No.GB/T 12190-2006
Statussuperseded
LanguageEnglish
File FormatPDF
Word Count13000 words
Price(USD)320.0
Implemented on2006-11-1
Deliveryvia email in 1 business day
Detail of GB/T 12190-2006
Standard No.
GB/T 12190-2006
English Name
Method for measuring the shielding effectiveness of electromagnetic shielding enclosures
Chinese Name
电磁屏蔽室屏蔽效能的测量方法
Chinese Classification
L06
Professional Classification
GB
ICS Classification
Issued by
AQSIQ
Issued on
2006-3-6
Implemented on
2006-11-1
Status
superseded
Superseded by
GB/T 12190-2021 Method for measuring the shielding effectiveness of electromagnetic shielding enclosures
Superseded on
2021-12-1
Abolished on
Superseding
GB/T 12190-1990 Measurement of shielding effectiveness of high-performance shielding enclosures
Language
English
File Format
PDF
Word Count
13000 words
Price(USD)
320.0
Keywords
GB/T 12190-2006, GB 12190-2006, GBT 12190-2006, GB/T12190-2006, GB/T 12190, GB/T12190, GB12190-2006, GB 12190, GB12190, GBT12190-2006, GBT 12190, GBT12190
Introduction of GB/T 12190-2006
1 Scope This standard provides procedures of measurement and calculation for shielding effectiveness of electromagnetic (EM) shielding enclosure whose each side is not smaller than 2.0. The standard is applicable to electromagnetic shielding enclosures at frequencies from 9 kHz to 18 GHz and as necessary, such frequencies may be extendable down to 50 Hz and up to 100 GHz. If a shielding enclosure is used as fully-anechoic enclosure or semi-anechoic enclosure, its measurement for shielding effectiveness shall be conducted before the absorbing materials are mounted. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these labels are applied or not. For undated references, the latest edition of the normative document referred to applies. GB/T 4365-2003 Electrotechnical terminology - Electromagnetic compatibility (idt IEC 60050 (161): 1990) 3 Terms and Definitions For the purpose of this standard, the terms and definitions defined GB/T GB/T 4365-2003 and the following ones apply. 3.1 dynamic range (DR) The range of amplitudes over which the receive system operates linearly (see B.6). If the signal amplitude is expressed by decibel (dB), the dynamic range is the difference between the maximum and minimum signal levels. For a measurement, the DR depends on the difference between the reference level and the minimum discernable signal above the noise floor. This should be verified during the DR validation step defined in 4.4. It represents the maximum SE measurable at that frequency with that particular equipment and settings. 3.2 shielding enclosure A structure that protects its interior from the effect of an exterior electric or magnetic field, or, conversely, protects the surrounding environment from the effect of an interior electric or magnetic field. It is normally constructed of metal with provisions for continuous electrical contact between adjoining panels, including doors. A high-performance shielding enclosure is generally capable of reducing the effects of both electric and magnetic field strengths by one to seven orders of magnitude depending upon frequency. 3.3 shielding effectiveness (SE) The ratio of the signal received (from a transmitter) without the shield, to the signal received inside the shield; the insertion loss when the shield is placed between the transmit antenna and the receiving antenna. 3.4 local source An emitter located close enough to a shielding enclosure for its electromagnetic energy to illuminate only a localized portion of a shielding face. 3.5 owner The individual, corporation, or organization that intends to use the shield and that is the ultimate source of the shielding requirement. 3.6 testing agency The organization that actually performs the tests and records the data. 4 Preliminary procedures 4.1 Preparation Reference level and dynamic range shall be measured before formal measurement. 4.2 Test plan
Contents of GB/T 12190-2006
Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Preliminary procedures 4.1 Preparation 4.2 Test plan 4.3 Calibration 4.4 Reference level and dynamic range 4.5 Preliminary shield check procedures 4.6 Warning 5 Detailed procedure of measurement 5.1 Background 5.2 Recommended typical measurement frequencies 5.3 Criteria 5.4 Shielding effectiveness calculation 5.5 Preparation procedures 5.6 Low-frequency measurements: 9 kHz to 20 MHz 5.7 Resonant range measurements: 20 MHz to 300 MHz 5.8 High range measurement: 300 MHz ~ 18 GHz 6 Testing report Annex A (Informative) Rationale A. 1 Basis A.2 Considerations A. 3 Cavity resonances A. 4 Measurement locations A. 5 Measurement equipment Annex B (Informative) Mathematical formulas B.1 Specific mathematical formulas B.2 Low range (50 Hz to 20 MHz) shielding effectiveness B.3 Resonant range (20 MHz~300 MHz) shielding effectiveness B.4 High range (300 MHz to 100 GHz) shielding effectiveness B.5 Nonlinear (logarithmic) calculations B.6 Dynamic range considerations Annex C (Informative) Miscellaneous supporting information C.1 Coplanar versus coaxial loops C.2 Nonlinearity of high-permeability ferromagnetic enclosures C.3 Selecting measurement frequencies Annex D (Informative) Guidelines for the selection of measurement techniques D.1 Types of enclosures D.2 Performance requirement D.3 Equipment requirements Annex E (Informative) Preliminary measurements and repairs E.1 Preparation E.2 Frequencies for preliminary check E.3 Preliminary check procedures
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