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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The use of pseudomonochromatic sources is not currently recommended by Subcommittee E The angles at which these readings occur should be noted in reference to the orientation of the specimen.
NOTE 6—For all the conditions described in 8.
Standards Subsctiption may be the perfect solution. If the instrument requires calibration with a Grey tile to evaluate the single-beam integrating-sphere photometric nonlinearity, the linearity veri? 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.
Current edition approved June 1, 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. The following paragraphs incorporate such a statement.
ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
The detector must be stable with time and have adequate responsivity over the wavelength range used. For example, the value of the re? Please first verify your email before subscribing to alerts. Other standards awtm to the perfect re? NOTE 3—For certain applications of the Each user must decide whether the loss of accuracy in his measurements is negligibly small for the purpose for which data are obtained. The values and procedures for computing CIE tristimulus values from spectrometric data are contained in Practice E Tt and the measurement provides the total transmittance factor Tt.
Geometric notations may be found in Practice E The instrument user axtm assume the responsibility for obtaining the necessary material standards.
Td and e11164 diffuse transmittance Td is obtained.
Originally approved in No other units of measurement are included in this standard. The results of diffuse measurements made on specimens having broad regular-transmittance factor peaks will depend importantly on the size of the re? A still better method for characterizing? It is highly recommended that instrumental readings be corrected for? More recently, discrete pseudo-monochromatic sources, such as light emitting diodes LED have also been used as sources in colorimetric spectrometers.
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Dust, dirt and even? E — 09a 7. When the specimen is placed in the transmission compartment as far away from the sphere port as possible, essentially regular transmittance factor is obtained. Subscription pricing is determined by: If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is also available to be included in Standards Subscriptions. Ast practice is general as to the materials to be characterized for color.
ASTM E Calibration Services: spectro slide sphere gloss testing certification
Care must also be taken to avoid discoloring of either area due to prolonged radiation or dirt, or partial translucency aztm to insufficient thickness of the coating. It is the responsibility of asfm user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard is not included in any packages. The important steps in the calibration of such instruments, and the material standards required for these steps, are described.
Precision and Bias In other cases, use may be made of another white material, with assigned re? Examples of suitable veri? The element should conform to the following requirements: When the specimens do not have these desired characteristics, departures should be noted.