Zero-based, least-squares, straight line method.
 Based on cable drive of 100 ft at 30 pF/ft 20 mA excitation.
 Calibrated on a steel bar at 100 με
 Linearity to full range can be obtained only when bond strength of epoxy mounting adhesive is suitable.
 Measured perpendicular to sensing axis.
 Strain level equivalent.
 See PCB Declaration of Conformance PS023 for details.