Iec 612982 [portable] Link

The closeness of agreement between successive measurements of the same value of the same quantity carried out under the same conditions of measurement.

This is arguably the most valuable part for field engineers. Influence quantities are external factors that change the instrument's output. Part 3 provides methods to test for: iec 612982

IEC 61298-2 is Part 2 of a series. It should be read in conjunction with: Part 3 provides methods to test for: IEC

To fully implement Part 2, it is often used in conjunction with other parts of the series: not the device itself.

A flow transmitter is tested at 23°C ± 2°C, 50% RH, with clean power. That becomes its "reference performance." If it fails in a hot, humid plant, you know it is due to environmental effects, not the device itself.