Calibration of process control temperature transmitter

Details Calibration of process control temperature transmitter Calibration of process control temperature transmitter

1994-09-27

1997-09-23

Dombroske, George M.

Thermal measuring and testing

Thermal calibration system

374179, 374183, 364557, G01K 1500

Patent

active

056697139

ABSTRACT:
A transmitter in a process control loop measures temperature. A calibrator includes a known calibration element which is connected to the transmitter. Software in the transmitter compares a measured value of the calibration element with the actual value of the calibration element and responsively calibrates the transmitter. The calibrator includes a temperature calibration sensor for coupling to a terminal block of the transmitter. The temperature calibration sensor provides an actual temperature input to the transmitter. The transmitter measures actual temperature of the terminal block and compares actual temperature with a temperature measured by an internal terminal block temperature sensor, and responsively calibrates the internal temperature sensor.

REFERENCES:
patent: 1344462 (1920-06-01), Thwing
patent: 3138776 (1964-06-01), Jones, Jr.
patent: 3327517 (1967-06-01), Huffman
patent: 3504522 (1970-04-01), Jasik et al.
patent: 3911745 (1975-10-01), Erhardt
patent: 4122719 (1978-10-01), Carlson et al.
patent: 4130019 (1978-12-01), Nitschke
patent: 4147061 (1979-04-01), Wester et al.
patent: 4163938 (1979-08-01), Moore
patent: 4369352 (1983-01-01), Bowles
patent: 4475823 (1984-10-01), Stone
patent: 4481596 (1984-11-01), Townzen
patent: 4528637 (1985-07-01), Smith
patent: 4532601 (1985-07-01), Lenderking et al.
patent: 4623266 (1986-11-01), Kielb
patent: 4716411 (1987-12-01), Nakamura
patent: 4870863 (1989-10-01), Duncan et al.
patent: 4936690 (1990-06-01), Goetzinger
patent: 5046858 (1991-09-01), Tucker
patent: 5056048 (1991-10-01), Seperant
patent: 5066140 (1991-11-01), Beran
patent: 5083288 (1992-01-01), Somlyody et al.
patent: 5121994 (1992-06-01), Molitoris
patent: 5161892 (1992-11-01), Shigezawa et al.
patent: 5211480 (1993-05-01), Thomas et al.
patent: 5251148 (1993-10-01), Haines et al.
patent: 5317520 (1994-05-01), Castle
patent: 5437745 (1995-08-01), Frank et al.
patent: 5492482 (1996-02-01), Lockman et al.
"Isolation and Conditioning Clean up Industrial Signals," Electronic Design, vol. 30, Apr. 1982, pp. 169-174 and 176 and 178.
"The Dynamic Thermometer: An Instrument for Fast Measurements with Platinum Resistance Thermometers," Trans Inst. MC, by H. Rosemary Taylor and M. Bashir Rihawi, vol. 15, No. 1, 1993, pp. 11-18.
"Shrinking the Hardware of Thermocouple Calibration," Control and Instrumentation, vol. 15, (1983), No. 6, pp. 59, 61 and 63.
Rosemount Product Data Sheet PDS 4275, "HART Communicator", Rosemount Inc., Chanhassen, MN, Jan. 1994, pp. 1-5.
Rosemount Product Data Sheet PDS 4384, "Model 262, 4-20 mA Field Calibrator", Rosemount Inc., Chanhassen, MN Sep. 1992, pp. 1-3.
Rosemount Product Data Sheet PDS 2560, "Model 268, Smart Family--Interface Featuring HART Communications", Rosemont Inc., Chanhassen, MN, Mar. 1992, pp. 1-3.

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