Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Reexamination Certificate
2006-12-04
2010-02-09
Verbitsky, Gail (Department: 2855)
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
C374S179000, C374S185000, C374S183000, C327S512000, C702S130000, C702S133000
Reexamination Certificate
active
07658539
ABSTRACT:
A process variable transmitter for measuring a temperature of a process includes a first, a second, third, and fourth terminal configured to couple to the temperature sensitive element. Measurement circuitry measures an electrical parameter between a pair of the terminals. A microprocess identifies a location of the temperature sensitive element coupled to at least two of the terminals based upon an electrical parameter measured by the measured circuitry between two terminals. In another configuration, the process variable transmitter measures temperature of a process using a thermocouple. A heating element is configured to heat terminals coupled to the thermocouple. A microprocessor determines polarity of the thermocoupled based upon a measured electrical parameter between the terminals in response to applied heat.
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“STT 3000 Smart Temperature Transmitter, Model STT350 Operator Manual”, Honeywell, EN1I-6162, Issue 8, Jul. 1999, 34 pages.
Jagan Mirellys
Rosemount Inc.
Verbitsky Gail
Westman Champlin & Kelly P.A.
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