Field transmitter built-in test equipment

Details Field transmitter built-in test equipment Field transmitter built-in test equipment

1993-09-15

1996-01-02

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324713, 324771, G01R 2708

Patent

active

054812003

ABSTRACT:
An improved error detection for microprocessor-based transmitters in two-wire process control loops operating in the process control industry. In particular, techniques are shown which are useful in solving malfunctions or failures of microprocessor-based transmitters. When the transmitter is energized, the impedance of the process loop cabling is resolved and stored, displayed or transmitted as desired. The loop impedance is used to calculate potential of a power supply used to power the control loop. This information is used in testing the two-wire loop.

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patent: 5339025 (1994-08-01), Jones et al.
patent: 5382912 (1995-01-01), Blain
patent: 5386188 (1995-01-01), Minneman et al.

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