A power generator starts an engine by overcoming an inrush current occurs. A test pad of the test element responsive in color to a characteristic of an aqueous solution is interrogated by the device by measuring intensity values of an interrogating test light as reflected off of the test pad. If there are portions that are representable as entries having wildcards, such portions of the given range are then represented as one or more entries that utilize wildcards. The distal end includes at least one end rib disposed about an inner circumference thereof. The disk drive has a head writing data to the disk, a sensor detecting a magnetic field with respect to the disk drive, and an actuator unloading the head from the surface of the disk to a retracting position outside of the disk when the detected magnetic field is out of a predetermined range.