IEC 62828-2:2026

Overview

IEC 62828-2:2026 sets out specific reference conditions and detailed procedures for testing industrial and process measurement transmitters used for pressure applications, commonly known as pressure process measurement transmitters (PMTs). Published by the International Electrotechnical Commission (IEC), this standard forms Part 2 of the IEC 62828 series and is closely aligned with IEC 62828-1, which covers general procedures for all types of process transmitters.

Pressure PMTs are essential in industrial and machinery control systems for accurate, reliable pressure measurement and control. They may incorporate remote seals to transmit the process variable to the sensing element. When these seals are inseparable from the PMT, the entire device is subject to standardized testing under this document.

This second edition replaces the 2017 version, bringing significant technical updates and aligning with the latest IEC standardization framework to enhance measurement accuracy, consistency, and device reliability.

Key Topics

• Scope of Testing:
  IEC 62828-2:2026 addresses test procedures tailored for pressure transmitters, including devices with remote seals, used in industrial measurement and process control.

• Updated Definitions:
  The standard includes more precise and comprehensive definitions of key terms related to pressure transmitters and their applications, ensuring clarity and uniformity.

• Reference Conditions:
  It establishes standardized reference test conditions critical for determining device accuracy, performance, and reliability.

• Test Procedures:
  Procedures include:

  • Accuracy tests across the operating range, considering both ascending and descending input cycles
  • Evaluation of the influence of overpressure and static pressure
  • Long-term drift assessment
  • Leak testing
  • Supplemental tests for remote diaphragm (seals) and burst pressure

• Reporting and Documentation:
  Consistent reporting templates and documentation requirements help ensure transparent and comparable test results.

• Technical Revisions:
  Technical formula corrections for measurement errors, stronger focus on long-term drift, and extension of supplemental tests.

• Annexes:
  The standard provides informative annexes with main characteristics of pressure transmitters and guidance on pressure units and transmitter types.

Applications

IEC 62828-2:2026 is vital for manufacturers, suppliers, and operators of pressure process measurement transmitters in a variety of industrial sectors, including:

• Process Industries:
  Chemical, petrochemical, pharmaceuticals, food processing, and water treatment plants rely on accurate pressure transmitters for safety, automation, and process quality.

• Machinery and Automation:
  Used in the control and diagnostic systems of pumps, compressors, and other machinery where pressure is a key variable.

• Calibration Laboratories:
  Provides a reference for uniform test procedures when evaluating or certifying new pressure transmitter models.

• Specification and Procurement:
  Facilitates uniform device selection, specification writing, and procurement based on internationally recognized test criteria.

By adhering to IEC 62828-2:2026, organizations can ensure reliable pressure measurement, support process safety, comply with international requirements, and streamline maintenance and inspection routines.

Related Standards

• IEC 62828-1:2026
  Reference conditions and procedures for testing industrial and process measurement transmitters - Part 1: General procedures for all types of transmitters

• IEC 61518
  Addresses the dimensions of connections for differential pressure measuring instruments and shut-off devices, ensuring mechanical compatibility

• Future parts of IEC 62828 Series:

  • Part 3: Procedures for temperature transmitters
  • Part 4: Procedures for level transmitters
  • Part 5: Procedures for flow transmitters

Conclusion

IEC 62828-2:2026 provides a comprehensive framework for the standardized testing of industrial pressure transmitters, ensuring measurement accuracy, operational safety, and the interoperability of process controls. By harmonizing definitions and procedures, the standard helps industry stakeholders achieve regulatory compliance and optimal process performance.