Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM D4496-21
• Năm ban hành / Publication date: 2021
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Test Method for D-C Resistance or Conductance of Moderately Conductive Materials
• Chỉ số phân loại Quốc tế (ICS) / By field: 29.050 - Vật liệu dẫn
• Số trang / Page: 5

Phạm vi áp dụng / Scope of standard

1.1 This test method covers the determination of electrical resistance and electrical resistivity of materials that are generally categorized as moderately conductive and are neither good electrical insulators nor good conductors.

1.2 This test method applies to the materials that exhibit volume resistivity in the range of 10⁰ to 10⁷ ω-cm or surface resistivity in the range of 10³ to 10⁷ ω (per square).

1.3 This test method is designed for measurements at standard conditions of 23 °C and 50 % relative humidity, but its principles of operation can be applied to specimens measured at lower or higher temperatures and relative humidities.

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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 8.3.

1.5 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.