| 摘要 |
PURPOSE:To obtain a differential pressure transmitter which is capable of controlling against a variation of static pressure easily and exactly, and is high in reliability, by correcting a meter output value by a cylindrical body which moves slantingly by making a sealing liquid as a medium, through a flexible body, in accordance with detected differential pressure. CONSTITUTION:A force beam 29 formed in one body with a cylindrical body 44 moves slantingly through a fixed strap 31 to a bellows 28 which is displaced in accordance with a pressure difference of a pressure chamber provided with diaphragms 25, 26 which are sealed with a silicone liquid, etc., respectively, and operate as low and high pressure receiving surfaces. As a result, a space between a nozzle 35 and a flapper 33 is varied in accordance with differential pressure, and a differential pressure oscillator 21 transmits a differential pressure signal corresponding to a back pressure variation of the nozzle 35. When the cylindrical body 44 is displaced through an adjusting screw 46 in accordance with static pressure of a sealing liquid, the initial position of the flapper 33 is adjusted by returning force of the cylindrical body 44 and bending force of a flexible body 32 due to static pressure of the sealing liquid, an output of the oscillator 21 due to a static pressure variation of the sealing medium is corrected easily and exactly, and also it responds automatically thereafter, too, and a differential pressure oscillator having high reliability is obtained. |
