Displacement errors of a transducer shall be measured. An incremental length transducer with measurement range of 60 mm with 10 nm resolution is used in the comparison. The measurement force of the transducer is generated by gravity and was not exactly determined prior to the comparison. The transducer is equipped with a digital display.
Displacement errors shall be measured in 10 measurement points distributed along the whole measurement range. Participating laboratories shall apply normal calibration procedures that are used for clients.