IEC 61326-2-1:20 20作为IEC 61326-2-1:20 20 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 61326:2020为具有测试和测量电路（设备内部或外部，或两者兼而有之）的设备规定了更详细的测试配置、操作条件和性能标准，这些电路由于制造商规定的操作和/或功能原因而不受EMC保护。制造商应指定产品预期使用的环境，并选择IEC 61326-1:20 20的适当测试水平规范。

IEC 61326-2-1:2020 is available as IEC 61326-2-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61326:2020 specifies more detailed test configurations, operational conditions and performance criteria for equipment with test and measurement circuits (internal or, external to the equipment, or both) that are not EMC protected for operational and/or functional reasons, as specified by the manufacturer. The manufacturer specifies the environment for which the product is intended to be used and selects the appropriate test level specifications of IEC 61326-1:2020.