Find the most up-to-date version of ASTM E at Engineering ASTM E() E1 Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation [ASTM International] on *FREE*. ASTM E Standard Practice for Obtaining Spectrometric Data for Object- Color Evaluation. This practice covers the instrumental measurement.
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Tt and the ast provides the total transmittance factor Tt. Thus there is only one mode of measurement possible for the d: Some modern, high brightness, retrore? Geometric notations may be found in Practice E NOTE 4—Corrections for errors in the use of integrating spheres for the 8. When the degree of directionality of the specimen is to be evaluated, uniplanar geometry should be used.
Current edition approved June 1, Your comments are invited awtm for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Details of the aztm, shape, and re? No other units of measurement are included in this standard. The element should conform to the following requirements: Care must also be taken to avoid discoloring of either area due to prolonged radiation or dirt, or partial translucency due to insufficient thickness of the coating.
ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Use of shorter wavelength ranges may result in reduced accuracy. Care should be taken not to touch the area to be measured except for application of a suitable cleaning procedure. E — 09a 7. No other units of measurement are included in this standard.
The presence of surface contaminants will critically affect the reliability of this standard.
In order to avoid implying unnecessary restrictions on instrumentation that can be used, when referencing this practice one should except in those cases of? The angles at which these readings occur should be noted in reference to the orientation of the specimen.
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The spectrometer may be either a typical colorimetric spectrometer, designed speci? The considerations involved and the procedures used to obtain precise spectrometric data are contained in this practice. Summary of Practice 4. For example, the value of the re? Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Proceed to Checkout Continue Shopping. Some national laboratories will accept user supplied white material standards and supply a calibration of the re?
Use of most geometries will not allow complete separation of the surface effects from the color. NOTE 5—When a hemispherical receiver such as an integrating sphere is used, and the specimen is placed?
When all regularly that is, specularly re? Special precautions, outlined here, must be observed to minimize the effects of these characteristics; the use of special equipment beyond the scope of this practice may be required to eliminate the effects entirely. The values and procedures for computing CIE tristimulus values from spectrometric data are contained in Practice E Commonly used light sources include incandescent lamps, either operated without?
Already Subscribed to this document. Your Alert Profile lists the documents that will be monitored. However, for the measurement of? Standards Subsctiption may be the perfect solution. However, the use of a wider interval can lead to signi?
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
The same restriction applies to the viewing beam. If the document is revised or amended, you will be notified by email. More recently, discrete pseudo-monochromatic sources, such as light emitting diodes LED have also been used as sources in colorimetric spectrometers. As the voice of the U.
Care must be asym to correct for this error 3, Test Method D