An instrumentation current loop

Details An instrumentation current loop An instrumentation current loop

G - Physics

01

D

G01D 11/00 (2006.01)

Patent

CA 2473030

An instrumentation current loop , including a transducer having transducer output terminals. A power source is connected in series to the transducer. A bridge has a first arm and a second arm extending between a pair of input terminals, where the input terminals of the bridge are connected to the transducer output terminals. The first arm comprises a first resistance and a second resistance connected via a first junction. The second arm comprises a third resistance and a fourth resistance providing a voltage reference connected via a second junction. A meter is connected between the first junction and the second junction. Values of the first, second, third and fourth resistance being selected so that a given range of input current provided by the transducer output terminals and supplied to the input terminals of the bridge is converted to a desired range of output current for the meter.

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