ASTM E1390-12
(Specification)Standard Specification for Illuminators Used for Viewing Industrial Radiographs
Standard Specification for Illuminators Used for Viewing Industrial Radiographs
ABSTRACT
This specification provides the recommended minimum requirements for industrial radiographic illuminators used for viewing industrial radiographic films using transmitted light sources. The function of the illuminator is to provide sufficient illumination and viewing capabilities for the purpose of identification and interpretation of radiographic images. The luminance of the transmitted light shall not be less than 30 candelas per square metre for film densities equal to or less than 2.5 optical density and not less than 10 candelas per square meter for film densities greater than 2.5 optical density. If the illuminator has a diffusing screen, the light shall be sufficiently divergent so that both eyes of the observer receive rays from all parts of the screen. The maximum illuminator luminance, and divergence and diffusion of light shall be tested to meet the requirements prescribed.
SCOPE
1.1 The function of the illuminator is to provide sufficient illumination and viewing capabilities for the purpose of identification and interpretation of radiographic images. This specification provides the recommended minimum requirements for Industrial Radiographic Illuminators used for viewing industrial radiographic films using transmitted light sources.
1.2 The illuminator has to ensure the same safety for personnel, or users of any electric apparatus, as specified by electrical standards applicable in the country in which the illuminator is used.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
1.4 Values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
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Designation:E1390 −12
Standard Specification for
1
Illuminators Used for Viewing Industrial Radiographs
This standard is issued under the fixed designation E1390; 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* 4. Ordering Information
1.1 The function of the illuminator is to provide sufficient 4.1 This specification is intended to be used by the manu-
illumination and viewing capabilities for the purpose of iden- facturers and purchasers of radiographic illuminators.
tification and interpretation of radiographic images.This speci- Requirements, if imposed on manufacturers, should be estab-
fication provides the recommended minimum requirements for lished by contractual agreement or appropriate purchase docu-
Industrial Radiographic Illuminators used for viewing indus- ment.
trial radiographic films using transmitted light sources.
5. Materials and Manufacture
1.2 The illuminator has to ensure the same safety for
5.1 General—The illuminator shall consist of a housing
personnel, or users of any electric apparatus, as specified by
with one or more of the sides containing a viewing screen
electrical standards applicable in the country in which the
illuminated from the inside of the housing. The viewing screen
illuminator is used.
may also be the diffusing screen. There shall be thermal
1.3 This standard does not purport to address all of the
protection to prevent overheating, and subsequent damage to
safety concerns, if any, associated with its use. It is the
the radiographs placed on the viewing screen. The housing or
responsibility of the user of this standard to establish appro-
system may or may not require ventilation. A rheostat or
priate safety and health practices and determine the applica-
suitable electrical circuit shall be provided to vary the light
bility of regulatory limitations prior to use.
intensity.
1.4 Values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided for
6. Physical Properties
information only.
6.1 General—The illuminator shall be manufactured of
materials deemed suitable to withstand the environmental
2. Referenced Documents
conditions encountered under normal operating conditions.
2
2.1 ASTM Standards:
6.2 Viewing Screen—The viewing screen shall be easy to
E1316 Terminology for Nondestructive Examinations
clean and made of material which is resistant to scratches. The
3. Terminology
size of the screen shall allow the user to view the radiograph
without excessive glare. If the illuminator is to be used for
3.1 Definitions:
viewing radiographs of various sizes, masks of various sizes
3.1.1 diffusing screen—the screen that scatters the light such
and configurations should be provided. Alternately, an adjust-
that the light appears the same brightness from any viewing
able aperture may be used.
angle.
6.3 Color of Light—The color of the light used to illuminate
3.1.2 viewing screen—the port through which the light is
the radiograph shall be white, that is, color temperature
projected.
between 5000 and 6250°K. However, illuminators using non-
3.2 For additional definitions of terms used in this
white or “colored” light may be used if they have been
specification, see Terminology E1316.
recommended by the film manufacturers.
6.4 Diffusing Screen—If the illuminator has a diffusing
1
This specification is under the jurisdiction of ASTM Committee E07 on
screen, the light shall be sufficiently divergent in accordance
Nondestructive Testing and is the direct responsibility of Subcommittee E07.01 on
with 7.2.
Radiology (X and Gamma) Method.
Current edition approved June 15, 2012. Published July 2012. Originally
6.5 Housing—The external housing shall be constructed in
approved in 1990. Last previous edition approved in 2006 as E1390 - 06. DOI:
such a manner that no disturbing light hinders the viewing of
10.1520/E1390-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or the radiographs.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.6 Anti-Glare Device—The illuminator shall be fitted with
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. an anti-glare switch or device that minimizes the probability of
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E1390−12
the operator being subjected to excessive glare when the
radiographisremoved.Thisswitchordev
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:E1390–06 Designation: E1390 – 12
Standard Specification for
1
Illuminators Used for Viewing Industrial Radiographs
This standard is issued under the fixed designation E1390; 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 The function of the illuminator is to provide sufficient illumination and viewing capabilities for the purpose of identification
and interpretation of radiographic images. This specification provides the recommended minimum requirements for Industrial
Radiographic Illuminators used for viewing industrial radiographic films using transmitted light sources.
1.2 The illuminator has to ensure the same safety for personnel, or users of any electric apparatus, as specified by electrical
standards applicable in the country in which the illuminator is used.
1.3 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 and health practices and determine the applicability of regulatory
limitations prior to use.
1.4 Values stated in SI units are to be regarded as the standard. The values given in parenthesies are provided for information
only.
2. Referenced Documents
2
2.1 ASTM Standards:
E1316 Terminology for Nondestructive Examinations
3. Terminology
3.1Definitions:
For definitions of terms used in this specification, see Terminology
3.1 Definitions:
3.1.1 diffusing screen—the screen that scatters the light such that the light appears the same brightness from any viewing angle.
3.1.2 viewing screen—the port through which the light is projected.
3.2 For additional definitions of terms used in this specification, see Terminology E1316.
4. Ordering Information
4.1 This specification is intended to be used by the manufacturers and purchasers of radiographic illuminators. Requirements,
if imposed on manufacturers, should be established by contractual agreement or appropriate purchase document.
5. Materials and Manufacture
5.1 General—The illuminator shall consist of a housing with one or more of the sides containing a viewing screen illuminated
from the inside of the housing. The viewing screen may also be the diffusing screen. There shall be thermal protection to prevent
overheating, and subsequent damage to the radiographs placed on the viewing screen. The housing or system may or may not
require ventilation. A rheostat or suitable electrical circuit shall be provided to vary the light intensity.
6. Physical Properties
6.1 General—The illuminator shall be manufactured of materials deemed suitable to withstand the environmental conditions
encountered under normal operating conditions.
6.2 Viewing Screen—The viewing screen shall be easy to clean and made of material which is resistant to scratches. The size
of the screen shall allow the user to view the radiograph without excessive glare. If the illuminator is to be used for viewing
1
This specification is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E07.01 on Radiology
(X and Gamma) Method.
Current edition approved Dec. 1, 2006. Published January 2007. Originally approved in 1990. Last previous edition approved in 2000 as E1390-90 (2000). DOI:
10.1520/E1390-06.
CurrenteditionapprovedJune15,2012.PublishedJuly2012.Originallyapprovedin1990.Lastpreviouseditionapprovedin2006asE1390 - 06.DOI:10.1520/E1390-12.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E1390 – 12
radiographs of various sizes, masks of various sizes and configurations shallshould be provided.Alternately, an adjustable aperture
may be used.
6.3 Color of Light—The color of the light used to illuminate the radiograph shall be white, that is, color temperature between
5000 and 6250°K. However, illuminators using non-white or “colored” light may be used if they have be
...
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