Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-05-20
1990-02-13
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340514, 340516, 340584, 340587, 340501, 73295, 376247, 364557, 364186, 374 10, 374164, G08B 2100
Patent
active
049010611
ABSTRACT:
Instrumentation and monitoring systems utilize, as differential temperature sensors, heated, split-well thermowells of duplex design, mounted to the sidewall of a pressure vessel and communicating through a penetration in the sidewall with the fluid state within the vessel. Each probe has at least one parallel axial bore therein, a related, selected pair of probes receiving respective heater and temperature sensing elements in the associated bores and together functioning as a differential temperature sensor producing distinguishable, differential temperature outputs representative of the presence of steam versus water. The systems monitor the differential temperature outputs of plural such sensors to produce alarm indications and perform verification and error checking of the sensor output indications. Duplex sensor embodiments permit toggling between different, selected such pairs of probes for on-line testing and verification of monitored conditions represented by the sensor output indications and of the operability of the elements and supporting circuits, under automatic and manual controls, and with on-line substitution of complementary elements in the event of element failure.
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"The Self-Validating Water Induction Monitoring System," Solartron Protective Systems, a division of Solartron Transducers, owned by Schlumberger, under its registered trademark "HYDRATECT-2455D."
Brochure of Fluid Components, Inc. entitled "Liquid Level & Interface Controllers," printed 4-85.
Abeles D. C.
Jackson Jill D.
Orsino Joseph A.
Westinghouse Electric Corp.
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