Process variable transmitter with self-learning loop diagnostics
作者： Steven John Mccoy , David Richard Lauzon
DOI:
关键词: Process control 、 Process variable 、 Loop (topology) 、 Transmitter 、 Engineering 、 Voltage 、 Sense (electronics) 、 Polynomial 、 Process (computing) 、 Control theory
摘要: A two-wire process variable transmitter (12) for use in an industrial (10) includes a sensor (14) configured to sense of fluid the (10). Output circuitry (36) provides output on control loop (18) which is related sensed variable. Terminal voltage measurement measures (92) at terminals (40) (12). The terminal measured across electrical connection (18). microprocessor (30) performs diagnostics based upon current and voltage. determines coefficients polynomial equation relates during normal operation subsequent polynomial.
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