Title:
CONTROLLER USED FOR PNEUMATIC APPARATUS
Document Type and Number:
Japanese Patent JPS6048516
Kind Code:
A
Abstract:
A temperature compensation circuit is provided which can be used for span temperature compensation in an electropneumatic transducer system and which includes a constant current generator circuit coupled to a bridge of piezo resistances in a pressure transducer to supply a constant current through one piezo resistance of the bridge to common. The Electropneumatic Transducer System includes a zeroing circuit, a voltage chopping circuit, a linearity correction circuit, a low-current shut-off circuit, and a high-current shut-off circuit to provide hard turn-ons and hard turn offs of the system at the lower and upper ends of the pressure output range or span. The Electropneumatic Transducer System also includes a voltage railsplitting circuit arrangement to minimize the operating currents, and voltages. With these features, the Electropneumatic Transducer System is particularly adapted for use in hazzardous combustible atmospheres where Intrinsic Saftey and accuracy are required.
Inventors:
DONARUDO CHIESUTAA SHIMUPUSON
Application Number:
JP14342284A
Publication Date:
March 16, 1985
Filing Date:
July 12, 1984
Export Citation:
Assignee:
EDEISUN INTERN INC
International Classes:
G01L1/22; G05D16/20; G08C23/00; (IPC1-7): G05D16/20; G08C23/00
Attorney, Agent or Firm:
Ashida Tan