ASTM F3057-21

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F3057 − 16 F3057 − 21
Standard Test Method for
Electromagnetic Shielding Effectiveness of Glazings
This standard is issued under the fixed designation F3057; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of the electromagnetic shielding effectiveness of glazings or glazing configurations.
1.1.1 The intended application of this test method is for glazings or glazing configurations to be evaluated for their transmittance
or shielding capability to electromagnetic frequencies.
1.1.2 This is a component test. It is not applicable to full systems such as walls, floors, ceilings, shielded racks, or window systems.
1.1.3 The intention of this test method is to standardize a measurement procedure for glazings or glazing configurations, with and
without coatings, films, interlayers, or other enhancements, as single or insulating units at a standard size and when mounted in
a standardized frame.
1.1.4 This test method is to provide a means of generating data for the glazing or glazing configuration infills that can be used
by the consumer, designer, and system manufacturer to understand the capability and contribution of glazings or glazing
configurations to a system used for Electromagnetic Interference (EMI) security.
1.2 This test method is for use in the assessment of EMI transmittance for frequency ranges 100 kHz to 20 GHz. Specific test
frequencies within these ranges are required.
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. Some specific hazards statements are given in Section 8 on Hazards.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
This test method is under the jurisdiction of ASTM Committee F12 on Security Systems and Equipment and is the direct responsibility of Subcommittee F12.10 on
Systems Products and Services.
Current edition approved Feb. 1, 2016Oct. 15, 2021. Published March 2016November 2021. Originally approved in 2014. Last previous edition approved in 20142016
as F3057 – 14.F3057 – 16. DOI: 10.1520/F3057-16.10.1520/F3057-21.
Available from American National For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org.
For Annual Book of ASTM Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.volume information, refer to the standard’s
Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F3057 − 21
E631 Terminology of Building Constructions
2.1 ANSI Standard:
ANSI/NCSL Z540.3 Requirements for the Calibration of Measuring and Test Equipment
2.2 IEEE Standards:
IEEE Standard 299–1977 IEEE Standard Method for Measuring the Effectiveness of Electromagnetic Shielding Enclosures
IEEE STD C95.1–1991 IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic
Fields, 3 kHz to 300 GHz
2.3 OSHA Standard:
OSHA Regulation, 29 CFR 1910 Department of Labor, July 1992
2.4 ANSI Standard:
ANSI/NCSL Z540.3 Requirements for the Calibration of Measuring and Test Equipment
2.3 ISO Standard:
ISO/IEC 17025:2005 General Requirements for the Competence of Testing and Calibration Laboratories
2.4 OSHA Standard:
OSHA Regulation, 29 CFR 1910 Department of Labor, July 1992
3. Terminology
3.1 Definitions:
3.1.1 accredited independent testing laboratory—testing laboratory accredited to perform the referenced testing procedures by a
nationally recognized accrediting agency in accordance with ISO/IEC 17025 and led by a test director.
3.1.2 electric field measurements—the attenuation provided by a glazing or glazing configuration is assessed by using a local
source to generate the electric field. Thefield; the electric field measurement will be from 1 to 100 MHz.
3.1.3 magnetic field measurements—the attenuation provided by a glazing or glazing configuration is assessed by using a local
source to generate the near field. Thefield; the magnetic field measurements will be conducted from 100 kHz to 20 MHz.
3.1.4 obscuration glazing—glass that may transmit light but only allows a limited amount of visual information to pass through.
3.1.5 plane wave measurements—the attenuation provided by a glazing or glazing configuration is assessed by using a locally
generated distant source or plane wave field. Thefield; the plane wave measurements will be from 100 MHz to 20 GHz.
3.2 Acronyms:
3.2.1 ANSI—American National Standards Institute.
3.2.2 cw—continuous wave.
3.2.3 EMI—Electromagnetic Interference.
3.2.4 h—hours.
3.2.5 IEC—International Electrotechnical Commission.
3.2.6 ISO—International Organization for Standardization.
3.2.7 NCSL—National Conference of Standards Laboratories.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Available from American National
Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.Institute (ANSI), 25 W. 43rd St., 4th Floor,
New York, NY 10036, http://www.ansi.org.
Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE), 445 Hoes Ln., Piscataway, NJ 08854, http://www.ieee.org.
Available from Occupational Safety and Health Administration (OSHA), 200 Constitution Ave., Washington, DC 20210, http://www.osha.gov.
Available from International Organization for Standardization (ISO), ISO Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva, Switzerland,
https://www.iso.org.
F3057 − 21
3.2.8 OSHA—Occupational Safety and Health Administration.
3.2.9 pw—plane wave.
3.2.10 SE—shielding effectiveness.
3.2.11 SI—système International d’unités (International System of Units)Units).
4. Summary of Test Method
4.1 This section is a summary of Section 13. Specific details are included in that section.
4.2 The test method applies to the magnetic field, electric field, and plane wave, and is comprised of a reference run and a
specimen run.
4.3 Measurements shall be taken at a minimum of 461 frequencies equally spaced across the tested logarithmic scale.
4.4 Reference runs are performed through the test aperture with the antenna in position but without the test specimen installed.
4.5 Specimen runs are performed in the same manner as the reference run, but with the specimen installed.
4.6 All test points are evaluated with the maximum received signal strength results stored under the specimen indicator number.
4.7 The attenuation level provided by the glazing or glazing configuration specimen is determined by subtracting the specimen
run data from the reference data.
4.8 Three identical specimens are tested with the results at each test point frequency averaged.
5. Significance and Use
5.1 This test method provides measurement procedures for determining the electromagnetic shielding effectiveness of glazings and
glazing configurations as a material. This test method specifies a method for comparing the glazings and glazing configurations
as an infill component to allow comparison of between different infills. In addition, this test method is written to minimize
variations in measured shielding effectiveness at a given frequency and test point regardless of test personnel, equipment, and test
site. Therefore, the shielding effectiveness of a glazing or glazing configuration from any supplier can be determined. This test
method specifies a minimum set of measurements over a frequency range to determine shielding effectiveness.
5.2 Source Fields—Performance of a shielded enclosure and glazing or glazing configurations are to be assessed for three source
fields: magnetic, electric, and plane wave.
6. Interferences
6.1 Interference with Electronic Equipment—Care shall be taken to avoid interference with other electronic equipment operating
in the vicinity
6.2 Operational Impact Analysis and Risk—The electromagnetic barrier must remain intact during the shielding effectiveness
measurement sequence, and use of electrically noisy equipment must be restricted. Radiated signal levels should present no hazard
to equipment, but frequency adjustments may be required to avoid self interference or interference with nearby facilities. Record
the actual test frequencies. Normal electrical safety precautions apply.
6.3 The test director shall ensure that testing is conducted with inboard and outboard surfaces of the test specimen identified, and
the test specimen shall be at the prescribed temperature in Section 12.
F3057 − 21
7. Apparatus
7.1 Test Chamber—An RF shielded enclosure that meets IEEE STD 299-1997.
7.2 Mounting Frame—The mounting frame must be capable of securely holding the glazing or glazing configuration in a fixed
location where the glazing or glazing configuration surface is parallel to the frame. The geometrical center of the glazing or glazing
configuration shall be 1 m from the floor. The edge capture of the glazing or glazing configuration shall be 26 6 2 mm, leaving
an aperture opening of 0.86 by 0.86 m 6 2 mm. For systems 0.91 by 0.91 m specimen and an aperture opening of 1.17 by 2.39
m for the 1.22 by 2.44 m specimen with the ability to test glazing configurations from 6 to 130 mm 6 2 mm thick.
7.2.1 The specimen must be mounted in a metal frame using the manufacturer’s installation procedures.
7.2.2 Shielding material may be grounded or not grounded. Special consideration given to the grounding of the specimen, it shall
be noted in the report.
7.3 The mounting plates should be constructed to not exert unnecessary pressure on the glazing or glazing configuration so as to
cause breakage, distortion, or compression of the glazing or glazing components.
7.4 Test equipment should be selected to provide a dynamic range that exceeds the shielding effectiveness of the glazing or glazing
configuration specimen.
8. Hazards
8.1 For human exposure to electromagnetic energy in controlled environments, the maximum permissible exposure to electric and
magnetic field strengths shall be minimized to the maximum extent possible. Acceptable levels can be found in IEEE STD
C95.1-1991 and OSHA Regulation, 29, CFR.
9. Sampling, Test Specimens, and Test Units
9.1 Sample—A sample shall consist of one glazing or glazing configuration unit.
9.2 Specimen:
9.2.1 Specimen Size—The specimen size to be tested shall correlate with the intended size of the system as follows:
9.2.1.1 For systems incorporating glazing infill less than or equal to 1 m in the short dimension, the specimen size shall be 0.91
by 0.91 m 6 3 mm.
9.2.1.2 For systems incorporating glazing infill greater than 1 m in the short dimension, the specimen size shall be 1.22 by 2.44
m 6 6 mm.
9.2.1.3 For systems requiring a test with glazing larger than those indicated in 9.2.1.2, may be specified by the authority having
jurisdiction and must be designated in the report per 15.2(3).
9.2.2 Specimen Configuration—The specimen shall be constructed with the same materials as will be made commercially
available. The materials used in the construction shall be documented. Substitution of materials or components without testing is
not permitted.
10. Preparation of Apparatus
10.1 Glazing Testing—Testing of glazing or glazing configuration can be conducted wherever the equipment and environment are
appropriate.
10.2 Movable Equipment—Movable equipment containing metal shall be removed from the test enclosure prior to making
measurements.
F3057 − 21
10.3 Preliminary Procedures—Perform the following preliminary test on all accessible shielding faces to detect weak points and
to permit remedy of shielding defects caused by faulty assembly and poor workmanship prior to actual measurement.
10.3.1 With the transmitting antenna turned off, perform a continuous wave (cw) measurement at each frequency to be used for
testing to ensure that no emitters are nearby that may cause interference. Frequency adjustments may be necessary to avoid
interferences.
10.3.2 Additionally, perform a receiving equipment coupling measurement. The setup for this measurement is the reference
measurement with the following exceptions. Disconnect the receiving antenna from the nearest cable and replace the receiving
antenna with a dummy load (resistive load matched to the characteristic impedance of the receiving system). Measured levels shall
be negligible so the required dynamic ranges are maintained. If the measured levels are larger than expected, determine the
penetration points and correct the identified leakage points. Repeat the receiving equipment coupling measurements until negligible
levels are maintained.
10.3.3 Perform a noise measurement with the following equipment setup. Place the receiving antenna and equipment on the
inboard side of the glazing or glazing configuration and turn off the transmitting antenna placed outboard side of the glazing or
glazing configuration. The receiving antenna or the specimen can be reversed as appropriate if the specimen is asymmetrical and
the orientation may cause a shielding difference side to side. The prescribed background tests are to be completed whenever the
specimen or equipment is moved. Measure the noise level at each frequency to be used for testing.
10.4 After noise levels have been found negligible (or the test equipment has been modified to make the penetration negligible),
position the transmitting and receiving antennas so that they align with the geometric center of the glazing or glazing configuration
specimen 66 mm.
11. Test Equipment Calibration
11.1 All test equipment shall be calibrated according to ANSI/NCSL Z540.3.
12. Conditioning
12.1 Glazing or glazing configuration shall be conditioned to 21 6 3°C3 °C with free fl
...