In one example, a method is provided and includes comparing a measured change in spacing between a transducer element and a storage element in response to a fly height control signal with an expected change in spacing for the applied fly height control signal. The adapter is positionable within the internal lumen of the catheter. A shoulder strap catch is adapted to be coupled at an end thereof to a portable device; and the shoulder strap catch defines an opening through which the cord region of the shoulder strap is slidably retained. The flushing carried out before the gas-phase fluorination for complete or partial removal of atmospheric oxygen from the reaction chamber 1 can also be effected at atmospheric pressure in the reaction chamber. A second dielectric layer overlies the insulating cap layer.