ASTM D6600-2017 pdf free download

ASTM D6600-2017 pdf free download.Standard Practice for Evaluating Test Sensitivity for Rubber Test Methods
1. Scope
1.1 This practice covers testing to evaluate chemical constituents, chemical and physical properties ofcompounding materials, and compounded and cured rubbers, which may frequently be conducted by one or more test methods. When more than one test method is available, two questions arise: Which test method has the better (or best) response to or discrimination for the underlying fundamental property being evaluated? and Which test method has the least error? These two characteristics collectively determine one type oftechnical merit of test methods that may be designated as test sensitivity. 1.2 Although a comprehensive and detailed treatment, as given by this practice, is required for a full appreciation of test sensitivity, a simplified conceptual definition may be given here. Test sensitivity is the ratio ofdiscrimination power for the fundamental property evaluated to the measurement error or uncertainty, expressed as a standard deviation. The greater the discriminating power and the lower the test error, the better is the test sensitivity. Borrowing from the terminology in electronics, this ratio has frequently been called the signal-to- noise ratio; the signal corresponding to the discrimination power and the noise corresponding to the test measurement error. Therefore, this practice describes how test sensitivity, generically defined as the signal-to-noise ratio, may be evalu- ated for test methods used in the rubber manufacturing industry, which measure typical physical and chemical properties, with exceptions as noted in 1.3.1.3 This practice does not address the topic ofsensitivity for threshold limits or minimum detection limits (MDL) in such applications as (1) the effect of intentional variations of compounding materials on measured compound properties or (2) the evaluation of low or trace constituent levels. Minimum detection limits are the subject of separate standards. 1.4 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use.
3. Terminology
3.1 A number of specialized terms or definitions are re- quired for this practice. They are defined in a systematic or sequential order from simple terms to complex terms; the simple terms may be used in the definition ofthe more complex terms. This approach generates the most succinct and unam- biguous definitions. Therefore, the definitions do not appear in the usual alphabetical sequence. 3.2 Definitions: 3.2.1 calibration material, CM, n—a material (or other object) selected to serve as a standard or benchmark reference material, with a fully documented FP reference value for a test method; the calibration material, along with several other similar materials with documented or FP reference values, may be used to calibrate a particular test method or may be used to evaluate test sensitivity. 3.2.1.1 Discussion—A fully documented FP or FP reference value implies that an equally documented measured property value may be obtained from a MP = f (FP) relationship. However, unless f= 1, the numerical values for the MP and the FP are not equal for any CM. 3.2.2 fundamental property, FP, n—the inherent or basic property (or constituent) that a test method is intended to evaluate. 3.2.3 measured property, MP, n—the property that the measuring instrument responds to; it is related to the FP by a functional relationship, MP = f (FP), that is known or that may be readily evaluated by experiment. 3.2.4 reference material, RM, n—a material (or other ob- ject) selected to serve as a common standard or benchmark for MP measurements for two or more test methods; the expected measurement value for each of the test methods, designated as the reference value, may be known (from other sources) or it may be unknown. 3.2.5 testing domain, n—the operational conditions under which a test is conducted; it includes description of the test sample or specimen preparation, the instrument(s) used (calibration, adjustments, settings), the selected test technicians, and the surrounding environment.