The range through which an input can be varied without initiating a measurable change in the output. This is critical for mechanical instruments and valves.
If you meant a different part (e.g., -1, -3, -4) or a completely different standard (like IEC 61282 for fiber optics or IEC 61298-2 for devices), please clarify, and I can provide a more focused paper or abstract.
IEC 61298-2 is an international standard that establishes a unified framework for testing and reporting the performance of process measurement and control devices under reference conditions iTeh Standards Core Purpose
The standard ensures that performance data for industrial instrumentation—such as sensors, actuators, and controllers—is reliable, repeatable, and comparable across different manufacturers. It applies to both analogue and digital devices
that are defined by specific input/output variables and transfer functions. iTeh Standards Key Performance Features Evaluated iec 612982
The standard outlines specific procedures for measuring several critical device characteristics: Accuracy-Related Factors : Includes methods for selecting test ranges, determining hysteresis , and identifying the (the range where input changes don't affect output). Dynamic Behavior : Defines tests for frequency response step response
to analyze how a device reacts to time-dependent signal changes. Functional Characteristics : Covers technical hardware evaluations such as electrical input resistance
, insulation strength, and power consumption (both electrical and pneumatic). Drift Analysis : Provides guidelines to quantify start-up drift long-term drift
, ensuring the device maintains its performance over its operational life. Standardized Reporting The range through which an input can be
: Specifies the use of uniform error curves, tables, and figures to support clear and objective comparisons in datasheets. iTeh Standards Current Status Active Edition : The most widely used version is IEC 61298-2:2008 (Edition 2.0). Future Updates
: A third edition (IEC 61298-2:2026) is currently in development as a technical revision to replace the 2008 version. IEC Webstore IEC 61298-2:2026 PRV
Adherence to IEC 61298-2 provides several benefits to the industrial ecosystem:
The closeness of agreement between successive measurements of the same value of the same quantity carried out under the same conditions of measurement. If you meant a different part (e
In the real world, instruments do not fail suddenly; they drift slowly. Part 4 focuses on long-term performance. It describes accelerated life testing and endurance runs to measure:
A common misconception: "If my new transmitter is 0.04% accurate, it will stay that way for 5 years." Part 4 testing often reveals that thermal cycling, diaphragm fatigue, or electronic component aging cause gradual decay. Responsible manufacturers use IEC 61298-4 to publish realistic drift specs.
If you need MTBF or failure rate data, refer to:
