This part ensures regulatory bodies, auditors, and customers can compare data from different suppliers without guessing.
Beyond basic performance, electrical and structural integrity are meticulously mapped: Evaluated Characteristic Test Objective
: Tests occur under strictly defined "normal" conditions (temperature, voltage, etc.) to establish a performance baseline. 2. Key Performance Indicators (KPIs) The standard defines procedures for measuring:
No. The standard only tells you how to test; it does not set performance thresholds. You still must define your required accuracy (e.g., 0.5% for inventory, 0.05% for custody transfer).
But Vendor B's data sheet includes statements like: "Tested according to IEC 61298-1 through -5. Reference accuracy: ±0.1% at 20°C. Additional temperature error: ±0.02% per 10°C. Long-term drift: 0.1% per year." Vendor A simply says "high accuracy." iec 612982
Your tank level reading has shifted by 4% over six months. Using the IEC 61298-4 methodology, you isolate the cause:
Applies to all measurement and control devices with clear input/output relationships.
, ensuring a device doesn't lose its calibration over months or years of service. Electrical & Pneumatic Integrity
The core objective of Part 2 is isolating the native behavior of a device. To prevent external factors from skewing accuracy data, tests must take place in an environment where all ambient and operational metrics are precisely maintained. This part ensures regulatory bodies, auditors, and customers
To provide standardized data sheets that customers can trust.
Understanding which version of the standard is in effect is crucial. The current, second edition was published in . However, a significant Third Edition is being rolled out between 2025 and 2026 .
: The device must sit in the reference environment for a specified period to achieve thermal and electrical equilibrium.
The device under test sits in the reference environment until it achieves full thermal and electrical equilibrium. But Vendor B's data sheet includes statements like:
To understand Part 2, it is necessary to see how it fits into the broader IEC 61298 framework. The multi-part series divides industrial performance evaluation into specialized testing vectors:
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: To validate and document that their products meet international quality claims before they hit the market. Test Laboratories