aparatgroottes

Aparatgroottes is a term used primarily in Dutch-language metrology to refer to the set of quantitative characteristics that define an instrument's performance. It describes the variables inherent to the apparatus rather than the quantity being measured.

Typical aparatgroottes include offset, gain, sensitivity, linearity, hysteresis, repeatability, resolution, noise, bandwidth, response time, temperature coefficients, drift, and calibration constants. These quantities are used to model how the instrument responds under different conditions and over time.

Determination and use: Aparatgrottes are established through calibration and characterization experiments. The resulting values are documented in instrument specification sheets and used to propagate measurement uncertainties and to compare instruments.

Examples: A digital thermometer may have aparatgrottes such as an offset, a gain, a temperature drift, and noise. A pressure transducer may have zero offset, sensitivity, nonlinearity, hysteresis, creep, and a temperature coefficient.

Relation to standards: In modern metrology, aparatgrottes are considered part of instrument constants that accompany a measurement result. They are distinct from the measured quantity's own uncertainty, but they feed the overall accuracy assessment. The term appears mainly in Dutch-language texts, and international readers may encounter equivalent concepts under names such as instrument constants or calibration parameters.