1.1 This test method covers the measurement of force displacement characteristics of a membrane switch.

1.1.1 This test method replaces Test Method F 1570 (Tactile Ratio). Tactile Response Slope better represents the characterization of tactile sensation, previously called "Tactile Ratio" in Test Method F 1570.

1.1.2 This test method replaces Test Method F 1682 (Travel).

1.1.3 This test method replaces Test Method F 1597 (Actuation and Contact Force).

1.1.4 This test method replaces Test Method F 1997 (Switch Sensitivity).

1.2 Force displacement hysterisis loop curve can be used in the determination of Actuation Force, Displacement, Contact Force, Return Force, and Tactile Response Slope.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.