GB/T 39640-2020Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure (English PDF)
家用电器及类似器具电磁场相对于人体曝露的测量方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 14, 2020
Implementation date
July 1, 2021
Scope
GB/T 39640-2020 is the English-translated version of 家用电器及类似器具电磁场相对于人体曝露的测量方法.
GB/T 39640-2020 is the Chinese standard "Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure".
Its scope clause reads: This standard specifies the evaluation method of electric field intensity and magnetic induction intensity around household and similar appliances, including operating conditions and measurement: Measuring distance and location, the electromagnetic field involved does not exceed 300GHz: The appliance can be equipped with a motor, an electric heating element or both, and it can contain electrical or electronic circuits: It can be powered by mains, batteries or other Power supply: Appliances include household appliances, electric tools and electric toys: Appliances that are not intended to be used in general households but are still accessible to the public or can be used by non-professionals belong to the scope of this standard: This standard does not apply to: ---Appliances specially designed for heavy industry; ---The electrical installation parts (such as fuses, circuit breakers, cables and switches) intended to be fixedly installed on the building; ---Broadcast and television receivers, audio and video equipment and electronic musical instruments; ---Medical electrical equipment; ---Personal computers and similar equipment; ---Radio transmitter; ---Design appliances dedicated to vehicles: For multi-function equipment involving different clauses of this standard and/or other standards at the same time, the relevant The function is evaluated: The abnormal operation of the appliance is not considered: This standard includes the following specific elements for assessing human exposure: ---Provisions for sensors; ---Measurement method regulations; --- Regulations on the operating mode of the equipment under test; ---Measurement distance and location regulations: The applicable frequency range of the specific measurement method is 10Hz~400kHz: Unless otherwise specified in GB 4706 (all parts), this standard Appliances within the range are deemed to comply with the frequency range above 400kHz and below 10Hz without testing:.
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Document preview — GB/T 39640-2020
National Standard of the People's Republic of China
- ICS
- 97.030
- Classification
- L 06
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions, symbols
- 4 Selection of measurement method and limit set
- 5 Measurement method
- 6 Evaluation of measurement results
- Appendix A (Normative Appendix) Operating conditions for measuring magnetic induction intensity
- Appendix B (Normative Appendix) Determination of Coupling Factor
- Appendix C (informative appendix) Exposure limits
- Appendix D (informative appendix) Examples of using Appendix C limits
1 Scope
This standard specifies the evaluation method of electric field intensity and magnetic induction intensity around household and similar appliances, including operating conditions and measurement:
Measuring distance and location, the electromagnetic field involved does not exceed 300GHz:
The appliance can be equipped with a motor, an electric heating element or both, and it can contain electrical or electronic circuits: It can be powered by mains, batteries or other
Power supply:
Appliances include household appliances, electric tools and electric toys:
Appliances that are not intended to be used in general households but are still accessible to the public or can be used by non-professionals belong to the scope of this standard:
This standard does not apply to:
---Appliances specially designed for heavy industry;
---The electrical installation parts (such as fuses, circuit breakers, cables and switches) intended to be fixedly installed on the building;
---Broadcast and television receivers, audio and video equipment and electronic musical instruments;
---Medical electrical equipment;
---Personal computers and similar equipment;
---Radio transmitter;
---Design appliances dedicated to vehicles:
For multi-function equipment involving different clauses of this standard and/or other standards at the same time, the relevant
The function is evaluated:
The abnormal operation of the appliance is not considered:
This standard includes the following specific elements for assessing human exposure:
---Provisions for sensors;
---Measurement method regulations;
--- Regulations on the operating mode of the equipment under test;
---Measurement distance and location regulations:
The applicable frequency range of the specific measurement method is 10Hz~400kHz: Unless otherwise specified in GB 4706 (all parts), this standard
Appliances within the range are deemed to comply with the frequency range above 400kHz and below 10Hz without testing:
2 Normative references
The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article
Pieces: For undated references, the latest version (including all amendments) applies to this document:
GB 4343:1 Electromagnetic compatibility requirements for household appliances, electric tools and similar appliances Part 1: Emission (GB 4343:1-2018,
CISPR14-1:2011, IDT)
GB 4706 (all parts) Safety of household and similar electrical appliances
GB 4706:2-2007 Safety of household and similar electrical appliances Part 2: Particular requirements for electric irons [IEC 60335-2-3:
2005(Ed5:1), IDT]
GB 4706:7-2014 Safety of household and similar electrical appliances: Special requirements for vacuum cleaners and water-suction cleaning appliances […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.
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