Abstract: When a hash expected value, which is an expected value of a hash value of activation software, is stored in a storing unit (111), a security calculation unit (110) compares the hash value of the activation software with the hash expected value. A main calculation unit (109) activates the activation software when the hash value and the hash expected value match, and stops a process when both do not match. The main calculation unit (109) performs signature verification for the activation software when the hash expected value is not stored in the storing unit (111), and stores in the storing unit (111) as the hash value expected value, the hash value of the activation software as well as activates the activation software when the signature verification is successful. The main calculation unit (109) stops a process when the signature verification is not successful.

Abstract: In a TEDS system, a data transmitting and receiving apparatus is provided and a signal transmitted from a TEDS memory to an apparatus side is logically inverted without using a transformer, and further a sneak signal is prevented. Inverters 28, 30 and zener diodes 32, 34 connected in parallel between the TEDS memory and a data driver of the apparatus are provided. Data transmitted from the TEDS memory to an apparatus 18 side is logically inverted by the inverter 28, and the logical voltage attenuates by a predetermined amount at the zener diode 32 to be supplied to the data driver. Since a sneak signal 100 whose logical voltage attenuates by a predetermined amount again by the zener diode 34 is supplied to the inverter 30, the transmission of a logic value is prevented by setting the threshold of the inverter 30 appropriately.

Abstract: In a TEDS system, a data transmitting and receiving apparatus is provided and a signal transmitted from a TEDS memory to an apparatus side is logically inverted without using a transformer, and further a sneak signal is prevented. Inverters 28, 30 and zener diodes 32, 34 connected in parallel between the TEDS memory and a data driver of the apparatus are provided. Data transmitted from the TEDS memory to an apparatus 18 side is logically inverted by the inverter 28, and the logical voltage attenuates by a predetermined amount at the zener diode 32 to be supplied to the data driver. Since a sneak signal 100 whose logical voltage attenuates by a predetermined amount again by the zener diode 34 is supplied to the inverter 30, the transmission of a logic value is prevented by setting the threshold of the inverter 30 appropriately.

Abstract: In a small-sized, high precision load cell, an annular fixed section is arranged around a load application section, and the load application section and the fixed section are connected by a plurality of arms. The arms connected to the fixed section are not radial or straight, but are bent. Thus, a direction of extension n of a distortion vulnerable section at which a hole is formed is approximately perpendicular to a straight line m which connects the load application section and the distortion vulnerable section. Therefore, it is possible to prevent tension, which arises when a load is applied to the load application section, from being conveyed to the distortion vulnerable section and to detect only the distortion with a gauge.

Abstract: In a small-sized, high precision load cell, an annular fixed section is arranged around a load application section, and the load application section and the fixed section are connected by a plurality of arms. The arms connected to the fixed section are not radial or straight, but are bent. Thus, a direction of extension n of a distortion vulnerable section at which a hole is formed is approximately perpendicular to a straight line m which connects the load application section and the distortion vulnerable section. Therefore, it is possible to prevent tension, which arises when a load is applied to the load application section, from being conveyed to the distortion vulnerable section and to detect only the distortion with a gauge.