This standard is part of the IEC 61298 series, which defines uniform test procedures to assess the characteristics of industrial process measurement instruments. Part 2 specifically addresses tests performed under (controlled laboratory environments) to determine the static performance, intrinsic accuracy, and influence quantities of a device.
| Term | Definition (per IEC 61298-2) | |-------|-----------------------------| | | A specified set of operating conditions (e.g., 23°C ± 2°C, 50% RH ± 10%, no vibration) under which the instrument’s intrinsic performance is measured. | | Intrinsic error | The error of the instrument when operated under reference conditions, expressed as a percentage of span. | | Hysteresis | The maximum difference in output for the same input value, measured during a full up-and-down cycle of the measurand. | | Dead band | The largest range of input change that produces no observable change in output. | | Repeatability | The closeness of agreement between successive output readings for the same input, under identical conditions over a short time. | iec 61298-2