IEC 61326-1:2012

Overview

IEC 61326-1:2012 - "Electrical equipment for measurement, control and laboratory use – EMC requirements – Part 1: General requirements" - specifies electromagnetic compatibility (EMC) requirements for immunity and emissions of electrical equipment operating from supplies below 1 000 V a.c. or 1 500 V d.c., or from the circuit being measured. This second edition (2012) replaces the 2005 edition and provides a technical update that clarifies requirements for portable test and measurement equipment, revises immunity test levels and performance criteria, and improves the description of electromagnetic environments.

Key topics and technical requirements

• Scope and equipment types: Applies to equipment for measurement and test, control, laboratory use, and related accessories intended for professional, industrial-process, industrial-manufacturing and educational environments.
• EMC test plan: Defines how to prepare and document tests including EUT (equipment under test) configuration, composition and assembly, I/O ports, auxiliary equipment, cabling and earthing, operation modes, environmental conditions and EUT software.
• Immunity requirements: Specifies immunity tests and conditions (including environmental and operational prerequisites), and revised performance criteria (A, B, C) that describe acceptable functional degradation and recovery.
• Emissions requirements: Sets measurement conditions and references emission limits (drawn from relevant IEC/CISPR publications) to limit interference with nearby equipment.
• Portable equipment: Annex A details immunity test requirements for portable test and measurement instruments powered from batteries or the measured circuit.
• Documentation and reporting: Requirements for test results, test reports and instructions for use (user documentation should include EMC-related information and limitations).

Applications and who uses it

IEC 61326-1 is intended for:

• Design and EMC engineers developing sensors, laboratory instruments, controllers, measurement systems and test equipment.
• Manufacturers preparing products for industrial, laboratory or educational markets.
• EMC test laboratories and compliance teams performing immunity and emissions testing and producing conformity reports.
• System integrators, procurement and quality managers specifying EMC compliance and assessing equipment suitability for particular electromagnetic environments.
• Technical writers producing user manuals with EMC instructions and installation guidance.

Practical uses include product development and validation, pre-compliance and full compliance testing, procurement specifications, installation guidance for industrial sites, and harmonizing EMC behavior across measurement and control systems.

Related standards

• IEC 61000-2-5 (electromagnetic environment descriptions)
• Relevant CISPR and IEC emission standards referenced for specific limits
• Other parts of the IEC 61326 series for equipment-specific requirements

Keywords: IEC 61326-1, EMC requirements, electromagnetic compatibility, immunity, emissions, test plan, measurement equipment, portable test equipment, laboratory instruments.