IEC 61326-2-1:20 20 RLV包含官方IEC国际标准及其红线版本。Redline版本仅提供英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC 61326:2020为具有测试和测量电路（设备内部或外部或两者）的设备规定了更详细的测试配置、操作条件和性能标准，这些电路由于操作和/或功能原因而不受EMC保护，如制造商所规定的。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 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its 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.