Abstract: Provided is a method of quantification of free sulfur that can accurately measure the free sulfur content of a rubber composition. The present disclosure relates to a method of quantification of free sulfur in a rubber composition, the method including extracting the free sulfur in the rubber composition with toluene.

Abstract: An evaluation device and method for DUT boards and probe cards which increase the reproducibility of the measured values and decrease the abrasion of pads in evaluation tests. A connection box is provided with contact pins, mounting mechanisms used to mount the DUT boards, and a plurality of connectors which feed signals from the contact pins to the outside.

Abstract: An evaluation device and method for DUT boards and probe cards which increase the reproducibility of the measured values and decrease the abrasion of pads in evaluation tests. A connection box is provided with contact pins, mounting mechanisms used to mount the DUT boards, and a plurality of connectors which feed signals from the contact pins to the outside.

Abstract: A contact making and breaking device improves the dielectric absorption property of capacitance between one signal wire brought out from a reed switch and an conductive casing. A low current measurement system using the contact making breaking device greatly shortens the measurement waiting time when low current is measured. The contact making and breaking device includes a reed switch with first and second signal wires brought out from either end, a conductive casing, and an insulating material formed between at least the first signal wire and the conductive casing. A tubular conductor is emplaced in the region in which the insulating material is formed and at least partially encloses the reed switch. The tubular conductor is connected to the first signal wire.

Abstract: A signal switching apparatus performs precise and high speed measurements that indicate DUT breakdown. Several switching circuits having multiple signal switching apparatus provided in parallel with input terminals and output terminals. Each switching circuit is structured to have; (a) A first switch circuit which inputs the guard signal together with the low current measurement signal; (b) a current limiting circuit connected to a stress signal terminal on the input; (c) a second switch circuit connected on the input to the output of the current limiting circuit, having a guard terminal connected to the output of the first switch circuit; (d) A guarded line, one end of which is connected to the output terminals, and the other end of which is connected to the first switch circuit and the output of second switch circuit.

Abstract: A contact making and breaking device improves the dielectric absorption property of capacitance between one signal wire brought out from a reed switch and an conductive casing. A low current measurement system using the contact making breaking device greatly shortens the measurement waiting time when low current is measured. The contact making and breaking device includes a reed switch with first and second signal wires brought out from either end, a conductive casing, and an insulating material formed between at least the first signal wire and the conductive casing. A tubular conductor is emplaced in the region in which the insulating material is formed and at least partially encloses the reed switch. The tubular conductor is connected to the first signal wire.