Accuracy: The closeness of an indicator or reading of a measurement device to the actual value of the quantity being measured; usually expressed as ± percent of the full scale output or reading.
Drift: The change in output or set point value over long periods of time due to such factors as temperature, voltage, and time.
Hysteresis: The difference in output after a full cycle in which the input value approaches the reference point (conditions) with increasing, then decreasing values or vice versa; it is measured by decreasing the input to one extreme (minimum or maximum value), then to the other extreme, then returning the input to the reference (starting) value.
Linearity: How closely the output of a sensor approximates a straight line when the applied input is linear.
Noise: An unwanted electrical interference on signal wires.
Nonlinearity: The difference between the actual deflection curve of a unit and a straight line drawn between the upper and lower range terminal values of the deflection, expressed as a percentage of full range deflection.
Precision: The degree of agreement between a number of independent observations of the same physical quantity obtained under the same conditions.
Repeatability: The ability of a sensor to reproduce output readings when the same input value is applied to it consecutively under the same conditions.
Resolution: The smallest detectable increment of measurement.
Sensitivity: The minimum change in input signal to which an instrument can respond.
Stability: The ability of an instrument to provide consistent output over an extended
period during which a constant input is applied.
Zero balance: The ability of the transducer to output a value of zero at the electronic null
point.
