1.1 本规程规定了使用数字探测器阵列（DDA）对金属和非金属材料进行射线照相检查的最低要求。 1.2 本规范的规定要求基于X射线产生源的使用。此外，一些测试和要求可能不适用于大于450kV的X射线能级。 1.3 本规程中的要求旨在控制使用DDA获得的射线照相检查的质量，而不是旨在建立零件或材料的验收标准。 1.4 本规程涵盖了使用DDA的射线照相检查，包括实践中描述的DDA E2597/E2597M 例如，包含连接到薄膜晶体管（TFT）读出结构的光电导体的器件，具有直接耦合到非晶硅读出结构的磷光体的器件- 输出结构，以及磷光体耦合到CMOS（互补金属氧化物半导体）阵列或CCD（电荷耦合器件）晶体硅读出结构的器件。 1.5 本惯例和惯例的要求 E2737 应一起使用。实践的要求 E2737 将提供DDA系统的基线评估和长期稳定性测试程序。DDA系统的用户应制定书面程序，解决其应用中使用的具体要求和测试，并应在检查生产硬件之前获得认可的射线照相3级批准。本规程还要求用户进行适合其预期目的的系统鉴定，并发布系统鉴定报告（见 9.1 ). 1.6 应根据指南中描述的技术知识，为无损检测应用选择DDA E2736 以及制造商根据实践提供的选定DDA特性 E2597/E2597M . 1.7 DDA采用的技术和应用多种多样。这种做法并非旨在限制或限制。参考指南 E94/E94M , E1000 和 E2736 术语 E1316 ，实践 E747 和 E1025 ，以及联邦标准21-CFR-1020.40和29-CFR-1910.96，以获取提供附加信息和指导的文件列表。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本规程为数字探测器阵列射线照相方法的应用和控制确定了基本参数。本规程的编写是为了在工程图纸、规范或合同中规定。它需要一个详细的程序来描述技术或程序要求，并应得到认可的工程组织（CEO）的批准。

1.1 This practice establishes the minimum requirements for radiographic examination of metallic and nonmetallic materials using digital detector arrays (DDAs). 1.2 The stated requirements of this specification are based on the use of an X-ray generating source. Additionally, some of the tests and requirements may not be applicable to X-ray energy levels >450kV. 1.3 The requirements in this practice are intended to control the quality of radiographic examinations obtained using DDAs and are not intended to establish acceptance criteria for parts or materials. 1.4 This practice covers the radiographic examination with DDAs including DDAs described in Practice E2597/E2597M such as a device that contains a photoconductor attached to a Thin Film Transistor (TFT) read out structure, a device that has a phosphor coupled directly to an amorphous silicon read-out structure, and devices where a phosphor is coupled to a CMOS (complementary metal–oxide–semiconductor) array, or a CCD (charge coupled device) crystalline silicon read-out structure. 1.5 The requirements of this practice and Practice E2737 shall be used together. The requirements of Practice E2737 will provide the baseline evaluation and long term stability test procedures for the DDA system. The user of the DDA system shall establish a written procedure that addresses the specific requirements and tests to be used in their application and shall be approved by the Cognizant Radiographic Level 3 before examination of production hardware. This practice also requires the user to perform a system qualification suitable for its intended purpose and to issue a system qualification report (see 9.1 ). 1.6 The DDA shall be selected for an NDT application based on knowledge of the technology described in Guide E2736 , and of the selected DDA properties provided by the manufacturer in accordance with Practice E2597/E2597M . 1.7 Techniques and applications employed with DDAs are diverse. This practice is not intended to be limiting or restrictive. Refer to Guides E94/E94M , E1000 , and E2736 , Terminology E1316 , Practices E747 and E1025 , and Federal Standards 21-CFR-1020.40 and 29-CFR-1910.96 for a list of documents that provide additional information and guidance. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This practice establishes the basic parameters for the application and control of the digital detector array radiographic method. This practice is written so it can be specified on the engineering drawing, specification, or contract. It will require a detailed procedure delineating the technique or procedure requirements and shall be approved by the Cognizant Engineering Organization (CEO).