Computer-implemented method and system for precise temperature c

Details Computer-implemented method and system for precise temperature c Computer-implemented method and system for precise temperature c

1992-06-12

1993-04-27

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

236 15BB, 236 78B, F25B 4100

Patent

active

052051323

ABSTRACT:
An embodiment of the present invention is a temperature forcing system and method for precision temperature control of a device-under-test. The system comprises a thermal test head suspended by a support arm that receives a temperature controlled air flow through an output hose from an air supply system. A pair of temperature sensors, one attached to the device-under-test and the other in the output hose, are used differentially by a closed-loop temperature controller when the temperature of the device-under-test comes within a temperature window surrounding a target temperature setpoint point. Outside the temperature window control is linear and within the temperature window control is compensated by a correction factor obtained during a single calibration test that amalgamates the effects of the mass of the device-under-test, the ambient conditions and other factors.

REFERENCES:
patent: 3625421 (1971-12-01), Garrison
patent: 4734872 (1988-03-01), Eager et al.
patent: 4925089 (1990-05-01), Chapardo et al.
patent: 5123477 (1992-06-01), Tyler

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