IEC 61298-2:2026

Overview

IEC 61298-2:2026 provides internationally recognized general methods and procedures for evaluating the performance of process measurement and control devices, excluding process measurement transmitters (PMT), which are standardized by the IEC 62828 series. This standard applies to both analogue and digital devices used in process control environments, covering tests under reference conditions. It serves as a foundational reference for test protocols and reporting in industrial automation, ensuring consistency, transparency, and comparability of device performance characteristics worldwide.

This third edition (2026) introduces significant changes, notably the exclusion of PMTs from its scope, further aligning with evolving standardization within the process instrumentation industry.

Key Topics

• Scope and Applicability: Applicable to various process measurement and control devices, characterized by distinct input and output variables and transfer functions; suitable for both analogue and digital technology.
• Test Methods: Outlines comprehensive procedures for accuracy verification, dynamic behavior evaluation, and reporting under controlled, reference conditions.
• Accuracy-Related Factors: Establishes standardized approaches to assess inaccuracy, hysteresis, non-linearity, dead band, and non-repeatability of devices.
• Measurement Procedures: Describes the selection of ranges for testing, preconditioning requirements, measurement cycles, and the number/location of test points for effective evaluation.
• Dynamic Behavior: Encompasses methods for frequency response, step response, rise time, settling time, and time constant determination.
• Functional Characteristics: Details tests for input resistance, insulation, power consumption, output ripple (for electrical DC outputs), pneumatic device airflow, and adjustment limits.
• Reporting: Defines standardized tables and graphical representation of errors and measurement results for transparent reporting and device comparison.

Applications

IEC 61298-2:2026 is crucial for manufacturers, testing laboratories, and end-users of process measurement and control instrumentation. Practical applications include:

• Device Evaluation and Certification: Provides a uniform basis for acceptance and conformity testing by manufacturers and independent testing bodies.
• Quality Assurance: Enables organizations to verify devices' performance characteristics before installation or during routine maintenance.
• Product Development and R&D: Offers guidelines to engineers designing new process control devices, ensuring compatibility with international performance expectations.
• System Integration: Facilitates reliable selection and integration of instrumentation in industrial control systems, supporting compliance and operational safety.
• Standardized Reporting: Assists in preparing consistent documentation required for regulatory or contractual purposes, supporting traceability and auditability.

Related Standards

• IEC 61298 Series: Part 1 (General Considerations) and other relevant parts in the series specify additional procedures and considerations.
• IEC 62828 Series: Standards focused on process measurement transmitters (PMT), excluded from IEC 61298-2:2026.
• IEC 61010-1: Safety requirements for electrical equipment for measurement and control.
• IEC 60050-300/351: Terminology and vocabulary for electrical measurements and control technology.
• ISO/IEC Directives: Foundational procedural and drafting guidelines for all IEC documents.

Summary

Adopting IEC 61298-2:2026 ensures a harmonized, globally accepted approach to testing the functional and performance characteristics of process measurement and control devices. This standard streamlines device evaluation and facilitates interoperability, reliability, and safety in industrial process automation. Its methods are instrumental for device manufacturers, testing engineers, and organizations aiming for high-quality, standards-compliant instrumentation within modern industrial environments.