Error Band

Error band is a measurement of worst case error. This is the best specification (compared to linearity) to determine an instrument suitability for an application. It is the band of maximum deviations of the output values from a specified reference line or curve due to those causes attributable to the transducer.

The Error Band specification describes a bipolar band (i.e. ±0.2%) around the ideal line. The “ideal line” is the line plotted where all dimensional changes produce perfect sensor output voltages. All measurements must fall within the Error Band for the instrument to be within specification. The magnitude of the band is equal to the worst case error throughout the sensor’s measurement range. Using the worst case error assures that every measurement made by the gage will perform within the Error Band specification.

The error band should be specified as applicable over at least two calibration cycles so as to include repeatability and verified accordingly.