Fisher Controls D101374X012 overview
Fisher Controls 646 Series Electro-Pneumatic TransducerThe Fisher 646 electro-pneumatic transducer uses a converter module that converts a 4 to 20 milliampere i...
Manufactured byFisher Controls
Part number or familyD101374X012
Product groupElectro-Pneumatic Transducers
Product details
Manufactured byFisher Controls
Product groupElectro-Pneumatic Transducers
DescriptionFisher Controls 646 Series Electro-Pneumatic TransducerThe Fisher 646 electro-pneumatic transducer uses a converter module that converts a 4 to 20 milliampere input signal to a proportional 0.2 to 1.0 bar (3 to 15 psig) pneumatic output signal. The converter module uses small parts of minimum mass, which are balanced symmetrically around a pivot point at the center of the mass. This balanced arrangement results in a high performance instrument that reduces sensitivity to vibration.An integral pneumatic relay provides the high capacity necessary to drive pneumatic control valve/actuator assemblies without additional boosters or positioners.The transducer also provides stable, accurate operation when its output is transmitted to small volume chambers, such as a pneumatic positioner or other pneumatic instrument. Reduced sensitivity to vibration combined with high capacity and first order lag characteristics make the 646 transducer ideal for irect mounting on control valve/actuator combinations.Connectors and piping can be installed with each 646 transducer for diagnostic testing.
Key FeaturesSmall Size—The small size and light-weight design of the transducer facilitate mounting and provide improved space utilization. Vibration Resistance—The transducer, used in a standard valve/actuator mounted application, exhibits an output shift of less than 1 percent of span when tested to SAMA Standard PMC 31.1, Condition 3. High Output Capability—The output volume of the transducer is adequate to drive valve/actuator combinations without requiring a positioner or volume booster. Low Air Consumption—The transducer has low air consumption which cuts operating costs. Easy Maintenance—Modular design of the converter allows easy replacement in the field for reduced maintenance costs. Superior Performance—The accuracy, linearity, and frequency response coupled with minimal hysteresis far exceed the requirements of most control systems.
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Fisher Controls
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Product group
Electro-Pneumatic Transducers
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