The present invention relates to a kit holding adapter for holding an analyzer for analyzing a target analyte in a sample together with a sampling tool used for taking a sample. A coil spring is placed in an annular space between an internal surface of a stationary cylinder member and external surfaces of the input and output cams and is provided at both ends thereof with curved portions which are placed respectively in the clearances. The circuit may operate with a minimum supply voltage of approximately the sum of the threshold voltage of a transistor plus three drain saturation voltages, in one example. The diffuser portion is cooled by the second cooling structure portion. In one such embodiment, a power management system includes a state machine, capable of transitioning the power management system to a safe state when an input signal andor an output signal from a component of the power management system indicates occurrence of an error in the component. The optical film laminate with predefined slit lines comprises an optically functional film having an adhesive layer which is subjected to a preliminary inspection, and a carrier film releasably laminated to the adhesive layer.