Process variable transmitter
First Claim
1. A process variable transmitter for transmitting a process variable to a receiving instrument at a location remote from said transmitter, comprising:
- a plurality of process variable detector units for detecting a primary process variable to be measured and for detecting secondary process variables which affect the primary process variable;
a memory circuit for storing detected outputs supplied from the process variable detector units;
processing means for reading the detected outputs of the memory circuit and then correcting the detected output indicative of the primary process variable based on the detected outputs indicative of the secondary process variables;
means for converting the corrected detected output to an output current signal and for transmitting said current signal to said remote receiving instrument; and
power supply control means for intermittently supplying electric power to the process variable detector units and the processing means.
1 Assignment
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Accused Products
Abstract
A process variable transmitter including a plurality of process variable detector units for detecting a primary process variable to be measured and secondary process variables not to be measured but which affect the primary process variable, a memory circuit for storing detected outputs supplied from the process variable detector units, a circuit for reading the detected outputs out of the memory circuit and then correcting the detected output indicative of the primary process variable based on the detected outputs indicative of the secondary process variables, and a power supply control for intermittently supplying electric power to the process variable detector units and the correcting circuit. The process variable transmitter corrects the primary process variable to precision and consumes a reduced amount of electric power.
26 Citations
7 Claims
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1. A process variable transmitter for transmitting a process variable to a receiving instrument at a location remote from said transmitter, comprising:
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a plurality of process variable detector units for detecting a primary process variable to be measured and for detecting secondary process variables which affect the primary process variable; a memory circuit for storing detected outputs supplied from the process variable detector units; processing means for reading the detected outputs of the memory circuit and then correcting the detected output indicative of the primary process variable based on the detected outputs indicative of the secondary process variables; means for converting the corrected detected output to an output current signal and for transmitting said current signal to said remote receiving instrument; and power supply control means for intermittently supplying electric power to the process variable detector units and the processing means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification