1、Designation: F3057 14Standard Test Method forElectromagnetic Shielding Effectiveness of Glazings1This standard is issued under the fixed designation F3057; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the elec-tromagnetic shielding effectiveness of glazings or glazingconfigurations.1.1.1
3、The intended application of this test method is forglazings or glazing configurations to be evaluated for theirtransmittance or shielding capability to electromagnetic fre-quencies.1.1.2 This is a component test. It is not applicable to fullsystems such as walls, floors, ceilings, shielded racks, or
4、window systems.1.1.3 The intention of this test method is to standardize ameasurement procedure for glazings or glazing configurations,with and without coatings, films, interlayers, or otherenhancements, as single or insulating units at a standard sizeand when mounted in a standardized frame.1.1.4 T
5、his test method is to provide a means of generatingdata for the glazing or glazing configuration infills that can beused by the consumer, designer, and system manufacturer tounderstand the capability and contribution of glazings orglazing configurations to a system used for ElectromagneticInterferen
6、ce (EMI) security.1.2 This test method is for use in the assessment of EMItransmittance for frequency ranges 100 kHz to 20 GHz.Specific test frequencies within these ranges are required.1.3 UnitsThe values stated in SI units are to be regardedas standard. No other units of measurement are included i
7、n thisstandard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.
8、 Some specifichazards statements are given in Section 8 on Hazards.2. Referenced Documents2.1 ASTM Standards:2E631 Terminology of Building Constructions2.2 IEEE Standards:3IEEE Standard 2991977 IEEE Standard Method for Mea-suring the Effectiveness of Electromagnetic ShieldingEnclosuresIEEE STD C95.1
9、1991 IEEE Standard for Safety Levelswith Respect to Human Exposure to Radio FrequencyElectromagnetic Fields, 3 kHz to 300 GHz2.3 OSHA Standard:4OSHA Regulation, 29 CFR 1910 Department of Labor, July19922.4 ANSI Standard:5ANSI/NCSL Z540.3 Requirements for the Calibration ofMeasuring and Test Equipmen
10、t2.5 ISO Standard:6ISO/IEC 17025:2005 General Requirements for the Compe-tence of Testing and Calibration Laboratories3. Terminology3.1 Definitions:3.1.1 accredited independent testing laboratorytestinglaboratory accredited to perform the referenced testing proce-dures by a nationally recognized acc
11、rediting agency in accor-dance with ISO/IEC 17025 and led by a test director.3.1.2 electric field measurementsthe attenuation providedby a glazing or glazing configuration is assessed by using alocal source to generate the electric field. The electric fieldmeasurement will be from 1 to 100 MHz.1This
12、 test method is under the jurisdiction of ASTM Committee F12 on SecuritySystems and Equipment and is the direct responsibility of Subcommittee F12.10 onSystems Products and Services.Current edition approved April 15, 2014. Published May 2014. DOI: 10.1520/F3057-14.2For referenced ASTM standards, vis
13、it the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE),445 Hoes Ln., Pis
14、cataway, NJ 08854, http:/www.ieee.org.4Available from Occupational Safety and Health Administration (OSHA), 200Constitution Ave., Washington, DC 20210, http:/www.osha.gov.5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.6A
15、vailable from International Organization for Standardization (ISO), 1, ch. dela Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http:/www.iso.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.3 magnetic field measurementsthe
16、 attenuation pro-vided by a glazing or glazing configuration is assessed by usinga local source to generate the near field. The magnetic fieldmeasurements will be conducted from 100 kHz to 20 MHz.3.1.4 plane wave measurementsthe attenuation providedby a glazing or glazing configuration is assessed b
17、y using alocally generated distant source or plane wave field. The planewave measurements will be from 100 MHz to 20 GHz.3.2 Acronyms:3.2.1 ANSIAmerican National Standards Institute.3.2.2 cwcontinuous wave.3.2.3 EMIElectromagnetic Interference.3.2.4 hhours.3.2.5 IECInternational Electrotechnical Com
18、mission.3.2.6 ISOInternational Organization for Standardization.3.2.7 NCSLNational Conference of Standards Laborato-ries.3.2.8 OSHAOccupational Safety and Health Administra-tion.3.2.9 pwplane wave.3.2.10 SEshielding effectiveness.3.2.11 SIsystme International dunits (InternationalSystem of Units)4.
19、Summary of Test Method4.1 This section is a summary of Section 13. Specific detailsare included in that section.4.2 The test method applies to the magnetic field, electricfield, and plane wave, and is comprised of a reference run anda specimen run.4.3 Measurements shall be taken at a minimum of 461f
20、requencies equally spaced across the tested logarithmic scale.4.4 Reference runs are performed through the test aperturewith the antenna in position but without the test specimeninstalled.4.5 Specimen runs are performed in the same manner as thereference run, but with the specimen installed.4.6 All
21、test points are evaluated with the maximum receivedsignal strength results stored under the specimen indicatornumber.4.7 The attenuation level provided by the glazing or glazingconfiguration specimen is determined by subtracting the speci-men run data from the reference data.4.8 Three identical spec
22、imens are tested with the results ateach test point frequency averaged.5. Significance and Use5.1 This test method provides measurement procedures fordetermining the electromagnetic shielding effectiveness ofglazings and glazing configurations as a material. This testmethod specifies a method for co
23、mparing the glazings andglazing configurations as an infill component to allow com-parison of between different infills. In addition, this test methodis written to minimize variations in measured shielding effec-tiveness at a given frequency and test point regardless of testpersonnel, equipment, and
24、 test site. Therefore, the shieldingeffectiveness of a glazing or glazing configuration from anysupplier can be determined. This test method specifies aminimum set of measurements over a frequency range todetermine shielding effectiveness.5.2 Source FieldsPerformance of a shielded enclosure andglazi
25、ng or glazing configurations are to be assessed for threesource fields: magnetic, electric, and plane wave.6. Interferences6.1 Interference with Electronic EquipmentCare shall betaken to avoid interference with other electronic equipmentoperating in the vicinity6.2 Operational Impact Analysis and Ri
26、skThe electro-magnetic barrier must remain intact during the shieldingeffectiveness measurement sequence, and use of electricallynoisy equipment must be restricted. Radiated signal levelsshould present no hazard to equipment, but frequency adjust-ments may be required to avoid self interference or i
27、nterferencewith nearby facilities. Record the actual test frequencies.Normal electrical safety precautions apply.6.3 The test director shall ensure that testing is conductedwith inboard and outboard surfaces of the test specimenidentified, and the test specimen shall be at the prescribedtemperature
28、in Section 12.7. Apparatus7.1 Test ChamberAn RF shielded enclosure that meetsIEEE STD 299-1997.7.2 Mounting FrameThe mounting frame must be capableof securely holding the glazing or glazing configuration in afixed location where the glazing or glazing configurationsurface is parallel to the frame. T
29、he geometrical center of theglazing or glazing configuration shall be 1 m from the floor.The edge capture of the glazing or glazing configuration shallbe 26 6 2 mm, leaving an aperture opening of 0.86 by 0.86 m6 2 mm with the ability to test glazing configurations from 6to 130 mm 6 2 mm thick.7.2.1
30、The specimen must be mounted in the frame usingstandard glazing or glazing configuration installation proce-dures.7.3 The mounting plates should be constructed to not exertunnecessary pressure on the glazing or glazing configuration soas to cause breakage, distortion, or compression of the glazingor
31、 glazing components.7.4 Test equipment should be selected to provide a dynamicrange that exceeds the shielding effectiveness of the glazing orglazing configuration specimen.8. Hazards8.1 For human exposure to electromagnetic energy in con-trolled environments, the maximum permissible exposure toelec
32、tric and magnetic field strengths shall be minimized to themaximum extent possible. Acceptable levels can be found inIEEE STD C95.1-1991 and OSHA Regulation, 29, CFR.F3057 1429. Sampling, Test Specimens, and Test Units9.1 SampleA sample shall consist of three identical glaz-ing or glazing configurat
33、ion unit specimens. The average of theperformance at each frequency is to be reported. If onespecimen is not statistically valid with the other two specimenresults, it may be rejected and another identical specimentested in its place. If statistical validation for the sample setdoes not occur on thi
34、s retest, then the results from all fourspecimens must be averaged and presented as the nominalperformance curve for the sample.9.2 Specimen:9.2.1 Specimen SizeThe specimen size shall be 0.91 by0.91 m 6 3 mm.9.2.2 Specimen ConfigurationThe specimen shall be con-structed with the same materials as wi
35、ll be made commerciallyavailable. The materials used in the construction shall bedocumented. Substitution of materials or components withouttesting is not permitted.10. Preparation of Apparatus10.1 Glazing TestingTesting of glazing or glazing con-figuration can be conducted wherever the equipment an
36、denvironment are appropriate.10.2 Movable EquipmentMovable equipment containingmetal shall be removed from the test enclosure prior to makingmeasurements.10.3 Preliminary ProceduresPerform the following pre-liminary test on all accessible shielding faces to detect weakpoints and to permit remedy of
37、shielding defects caused byfaulty assembly and poor workmanship prior to actual mea-surement.10.3.1 With the transmitting antenna turned off, perform acontinuous wave (cw) measurement at each frequency to beused for testing to ensure that no emitters are nearby that maycause interference. Frequency
38、adjustments may be necessary toavoid interferences.10.3.2 Additionally, perform a receiving equipment cou-pling measurement. The setup for this measurement is thereference measurement with the following exceptions. Discon-nect the receiving antenna from the nearest cable and replacethe receiving ant
39、enna with a dummy load (resistive loadmatched to the characteristic impedance of the receivingsystem). Measured levels shall be negligible so the requireddynamic ranges are maintained. If the measured levels arelarger than expected, determine the penetration points andcorrect the identified leakage
40、points. Repeat the receivingequipment coupling measurements until negligible levels aremaintained.10.3.3 Perform a noise measurement with the followingequipment setup. Place the receiving antenna and equipmenton the inboard side of the glazing or glazing configuration andturn off the transmitting an
41、tenna placed outboard side of theglazing or glazing configuration. The receiving antenna or thespecimen can be reversed as appropriate if the specimen isasymmetrical and the orientation may cause a shielding differ-ence side to side. The prescribed background tests are to becompleted whenever the sp
42、ecimen or equipment is moved.Measure the noise level at each frequency to be used fortesting.10.4 After noise levels have been found negligible (or thetest equipment has been modified to make the penetrationnegligible), position the transmitting and receiving antennas sothat they align with the geom
43、etric center of the glazing orglazing configuration specimen 66 mm.11. Test Equipment Calibration11.1 All test equipment shall be calibrated according toANSI/NCSL Z540.3.12. Conditioning12.1 Glazing or glazing configuration shall be conditionedto 21 6 3C with free flowing air between the lites for a
44、minimum of 4 h prior to test. This temperature is to be heldthroughout the test.13. Procedure13.1 General Test Procedures for Each Glazing or GlazingConfiguration Specimen:13.1.1 The test procedure applies to magnetic field, electricfield, and plane wave and is comprised of two basic setups: arefere
45、nce run and a specimen run.13.1.2 Transmit and receive antennae must be positioned atthe distances discussed above and centered (horizontally andvertically) in the aperture.13.1.3 The reference run is performed through the testaperture with the antenna in position but without the testspecimen instal
46、led. It is important that all mounting frame orbracing be installed, without the glazing or glazing configura-tion specimen. All test points are evaluated with the maximumreceived signal strength results stored as reference.13.1.4 The specimen run is performed in the same manneras the reference run,
47、 but with the glazing or glazing configu-ration specimen installed. All test points are evaluated with themaximum received signal strength results stored under thespecimen indicator number.13.1.5 The attenuation level provided by the glazing orglazing configuration specimen is determined by subtract
48、ingthe specimen run data from the reference data.13.1.6 Three identical specimens are to be tested with theresults at each test point frequency averaged. If the onespecimen results are significantly anomalous from the othertwo, a new third specimen may be tested. If the new specimenis also anomalous
49、, then the results from all four specimensmust be averaged and presented as the nominal performancecurve for the sample.NOTE 1For specific applications, the frequency range may be ex-tended to 40 GHz. Appendix X1 provides guidance on measurementfrequencies.13.2 Magnetic Field Testing Procedures:13.2.1 The magnetic field testing shall be run with thetransmitting and receiving antenna located directly oppositeeach other and separated from the material under test by aF3057 143distance of 30.48 cm from the surface of the glazing or glazingconfigurat
