| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve positioner that can simply perform zero-span setting to a set signal, without the need for a special apparatus, such as a signal generator, and to provide a drive device for valve driving equipped with the valve positioner. <P>SOLUTION: The valve positioner is constituted, such that the function for adjusting the operation angle of a present valve to a set signal form (signal standard) is provided to the valve positioner and can perform the zero-span setting of the set signal at a valve operating angle that is inputted from the outside, on the basis of a signal after adjustment (hereinafter to be referred to as post-adjustment signal) in the same form as that of the post-adjustment signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
