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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Standards Subsctiption may be the perfect solution. A number in parentheses indicates the year of last reapproval.
Other standards calibrated to the perfect re? However, for the measurement of? No other units of measurement are included in this standard. It exceeds unity if the system is such that the e11164 causes more light to reach the receiver than would in its absence.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. NOTE 3—For certain applications of the You may delete a document from your Alert Profile at any time. Blocking should be carried out by replacing the specimen with an opaque object of the same size and shape as the specimen, placed in the same position. Standardization and Material Standards If a white re? The angles at which these readings occur should be noted in reference to the orientation of the specimen.
NOTE 2—With the possible exception of the measurement of unusually structured or? The condition of the specimens before ee1164 after measurement should be noted and reported. When the specimen is placed in the transmission compartment as far away from the sphere port as possible, essentially regular transmittance factor is obtained. Geometric notations may aatm found in Practice E 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.
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ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Tt and the measurement provides the total transmittance factor Tt. The same restriction applies to the viewing beam. Inter-instrument agreement comparing different types of instruments, especially if different geometric parameters of the illuminating and viewing conditions are involved, is likely to be an order of magnitude poorer 23, Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Examples of suitable veri? If the black-cavity traps light by utilizing asymmetric or off-axis black optics then a preferred orientation of the cavity relative to the optical axis should be identi? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Subscription pricing is determined by: It is essential that these portions impinge on areas of the sphere wall having the same re?
In order to avoid implying unnecessary restrictions on instrumentation that can be used, when referencing this practice one should except in those cases of? Use of most geometries will not allow complete separation of the surface effects from the color.
The presence of surface contaminants will critically affect the reliability of this standard. The requirements for illuminating and viewing may be interchanged.
See also Guide E and Practice E However, the use of a wider interval can lead to signi? Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. When the regularly transmitted beam is excluded, for example by the use of a light trap, the condition is designated 0: This standard is not included in any packages.
When the specimens do not have these desired characteristics, departures should be noted. In other cases, use may be made of another white material, with assigned re? The instrument user must assume the responsibility for obtaining the necessary material standards.
Td and the diffuse transmittance Td is obtained. Whenever the cavity is employed it should always be presented to the instrument in the indicated orientation. Use of a wider interval, such as 10 nm or 20 nm, will result in a signi? When the degree of directionality of the specimen is to be evaluated, uniplanar geometry should be used. Colorimetric data are obtained by combining object spectral data with data representing a CIE standard observer and a CIE standard illuminant, as described in Practice E In such cases, verify the accuracy of the reading at the low end of the photometric scale by using a calibrated standard with re?
The considerations involved and the procedures used to obtain precise spectrometric data are contained in this practice. Your Alert Profile lists the documents that will be monitored. Each user must decide whether the loss of accuracy in his measurements is negligibly small for the purpose for which data are obtained.
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The information reported here re? If the instrument requires calibration with a Grey tile to evaluate the single-beam integrating-sphere photometric nonlinearity, the linearity veri? Errors in the apparent re?
When information on directionality is not required, the several measurements may be averaged.
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
1e164 The CIE recommends that this ideal standard of re? Requirements When Using Spectrometry 6. The spectrometer may be either a typical colorimetric spectrometer, designed speci? A still better method for characterizing?