Abstract: Disclosed are an apparatus and a method for determining whether or not a biosensor comprising two working electrodes and one reference electrode is well manufactured, and for rapidly and accurately quantifying a specific substance contained in a biological sample. The method comprises the steps of: sequentially supplying the respective working electrodes with power supply voltage; sequentially detecting the amounts of current flowing in the respective working electrodes by virtue of the supplied power supply voltage; re-supplying the two working electrodes with power supply voltage after a predetermined time to redetect the amounts of current flowing in the respective working electrodes; reading concentrations corresponding to the amounts of current detected from a memory, and calculating an average value from the read concentrations; and checking whether or not the concentrations read from memory are within a predetermined critical range to display an error message or the calculated average value.

Abstract: Disclosed are an apparatus and a method for determining whether or not a biosensor comprising two working electrodes and one reference electrode is well manufactured, and for rapidly and accurately quantifying a specific substance contained in a biological sample. The method comprises the steps of: sequentially supplying the respective working electrodes with power supply voltage; sequentially detecting the amounts of current flowing in the respective working electrodes by virtue of the supplied power supply voltage; re-supplying the two working electrodes with power supply voltage after a predetermined time to redetect the amounts of current flowing in the respective working electrodes; reading concentrations corresponding to the amounts of current detected from a memory, and calculating an average value from the read concentrations; and checking whether or not the concentrations read from memory are within a predetermined critical range to display an error message or the calculated average value.

Abstract: A coupling device for attaching a camera to a tripod which has a first coupling member attached on the underneath side thereof to the top of the tripod. A hollow upright member is positioned on the top, central portion of the first coupling member, and has a hole through at least one of its upright side walls. A hook member is pivotally mounted in the hollow member and extends through the hole in the side of the hollow member, while a push member within the first coupling plate adjacent the hook member pushes against the hook member and causes it to rotate. The push member is biased by a first spring on the opposite side of said hook member. Attached to the bottom of the camera is a second coupling member which has a screw portion at the top thereof threaded into the camera and an open cavity in the bottom thereof beneath the screw portion. The cavity is inserted over the hollow upright member, and the inside of the cavity has at least one locking groove engageable with the hook member.