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Automated Thermal Test System

IP.com Disclosure Number: IPCOM000042422D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Buller, ML: AUTHOR [+2]

Abstract

There is shown and described a computer-controlled thermal test system which automatically supplies cooling air, compensated for variations in pressure, temperature, and humidity. Additionally, constant power is provided to the units under test. The system functions automatically to supply constant air pressure of standard cubic feet per minute (SCFM) to a populated card package 1 and to maintain constant power dissipation in the thermal chips 2 for the purpose of making thermal measurements which are repeatable and reliable. The SCFM and power may be varied over wide ranges in order to generate a series of curves which may be used to predict the thermal performance of similar components in a variety of environments. The local computer is used to control the power supplies and to collect the test data.

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Automated Thermal Test System

There is shown and described a computer-controlled thermal test system which automatically supplies cooling air, compensated for variations in pressure, temperature, and humidity. Additionally, constant power is provided to the units under test. The system functions automatically to supply constant air pressure of standard cubic feet per minute (SCFM) to a populated card package 1 and to maintain constant power dissipation in the thermal chips 2 for the purpose of making thermal measurements which are repeatable and reliable. The SCFM and power may be varied over wide ranges in order to generate a series of curves which may be used to predict the thermal performance of similar components in a variety of environments. The local computer is used to control the power supplies and to collect the test data. The main programs reside in the data logger. The data logger software controls the air blower, reads the thermocouples and voltage drop across the temperature-sensitive diodes on the thermal chips 2 and sends power set points to the local computer. Programs resident in the local computer communicate with the data logger to control the power supplies, log the data, and communicate with the host computer.

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