Process control transmitter

Details Process control transmitter Process control transmitter

1995-09-29

1998-01-06

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

With particular system function

340517, 340522, 340521, 340506, 36457102, 36457103, G08B 2900

Patent

active

057059780

ABSTRACT:
A transmitter in a process control system includes input/output circuitry for coupling to a process control loop. A first sensor having a first impedance is responsive to a first sensed parameter. A second sensor having a second impedance is responsive to a sensed parameter. First and second excitation signals are applied to the first and second sensors. A summing node sums the outputs of the first and second sensors. An analog to digital converter provides a digital output representative of the summed signals. Digital signal processing circuitry coupled to the analog to digital converter provides an output related to the outputs of the first and second sensors to the input/output circuitry for transmission over the process control loop.

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