In addition to the scope of IEC 61326-1, this part of IEC 61326 specifies more detailed test
configurations, operational conditions and performance criteria for equipment with test and
measurement circuits (both internal and/or external to the equipment) 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.