| 摘要 |
PURPOSE:To execute easily a correction and a maintenance by providing a correcting voltage circuit for detecting a shift of a comparing signal to a pneumatic pressure signal, and correcting its shift. CONSTITUTION:An electropneumatic converter is provided with a piezoelectric element flapper 1, a nozzle 2, a pilot relay 3, a pressure sensor 4, a signal converter 5, a comparator 7 and a correcting circuit 8. An output of the comparator 7 is varied extending from -30V to +30V, therefore, the output of the comparator 7 is set so as to become a characteristic shown by a full line, and with regard to a difference -15V to its broken line, the correcting circuit 8 generates a correcting voltage.
|
