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.
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.
1.3 Values stated in SI units are to be regarded as the standard. The values given in parenthesis are provided for information only.

General Information

Status
Historical
Publication Date
30-Nov-2006
Current Stage
Ref Project

Relations

Buy Standard

Guide
ASTM E1390-06 - Standard Specification for Illuminators Used for Viewing Industrial Radiographs
English language
3 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E1390 – 06
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 5. Materials and Manufacture
1.1 The function of the illuminator is to provide sufficient 5.1 General—The illuminator shall consist of a housing
illumination and viewing capabilities for the purpose of iden- with one or more of the sides containing a viewing screen
tification and interpretation of radiographic images.This speci- illuminated from the inside of the housing. The viewing screen
fication provides the recommended minimum requirements for may also be the diffusing screen. There shall be thermal
Industrial Radiographic Illuminators used for viewing indus- protection to prevent overheating, and subsequent damage to
trial radiographic films using transmitted light sources. the radiographs placed on the viewing screen. The housing or
1.2 The illuminator has to ensure the same safety for system may or may not require ventilation. A rheostat or
personnel, or users of any electric apparatus, as specified by suitable electrical circuit shall be provided to vary the light
electrical standards applicable in the country in which the intensity.
illuminator is used.
6. Physical Properties
1.3 This standard does not purport to address all of the
6.1 General—The illuminator shall be manufactured of
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- materials deemed suitable to withstand the environmental
conditions encountered under normal operating conditions.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 6.2 Viewing Screen—The viewing screen shall be easy to
clean and made of material which is resistant to scratches. The
1.4 Values stated in SI units are to be regarded as the
standard. The values given in parenthesis are provided for size of the screen shall allow the user to view the radiograph
without excessive glare. If the illuminator is to be used for
information only.
viewing radiographs of various sizes, masks of various sizes
2. Referenced Documents
and configurations shall be provided.Alternately, an adjustable
2
2.1 ASTM Standards: aperture may be used.
E1316 Terminology for Nondestructive Examinations 6.3 Color of Light—Thecolorofthelightusedtoilluminate
the radiograph shall be white, that is, color temperature
3. Terminology
between 5000 and 6250°K. However, illuminators using non-
3.1 Definitions: white or “colored” light may be used if they have been
For definitions of terms used in this specification, see
recommended by the film manufacturers.
Terminology E1316. 6.4 Diffusing Screen—If the illuminator has a diffusing
screen, the light shall be sufficiently divergent so that both eyes
4. Ordering Information
of the observer receive rays from all parts of the screen.
4.1 This specification is intended to be used by the manu-
6.5 Housing—The external housing shall be constructed in
facturers and purchasers of radiographic illuminators. Require-
such a manner that no disturbing light hinders the viewing of
ments, if imposed on manufacturers, should be established by
the radiographs.
contractual agreement or appropriate purchase document.
6.6 Anti-Glare Device—The illuminator shall be fitted with
an anti-glare switch or device that minimizes the probability of
1
the operator being subjected to excessive glare when the
This specification is under the jurisdiction of ASTM Committee E07 on
Nondestructive Testing and is the direct responsibility of Subcommittee E07.01 on
radiographisremoved.Thisswitchordevicemaybemanualor
Radiology (X and Gamma) Method.
automatic.
Current edition approved Dec. 1, 2006. Published January 2007. Originally
6.7 Illuminators Used for Viewing “Wet” Radiographs—
approved in 1990. Last previous edition approved in 2000 as E1390 - 90 (2000).
Illuminators manufactured for use in viewing “wet” radio-
DOI: 10.1520/E1390-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
graphs shall be manufactured to prevent the penetration of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
liquid into internal electrical components in such a manner that
Standards volume information, refer to the standard’s Document Summary page on
safe operation of the unit would be compromised.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.