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Piping System With Valves Controlled by Processor for Heating Circuit Modules in a Selected Temperature Profile for Sealing Integrity Test Under Temperature Stress

IP.com Disclosure Number: IPCOM000040283D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Buliszyn, S: AUTHOR [+2]

Abstract

In a known sealing integrity test, circuit modules are heated by circulating hot water through the connections that are normally used for chilled water that removes heat from the modules. The module temperature is raised at a selected rate to a predetermined value, held at this temperature for a selected time interval, and then lowered to room temperature at a selected rate. A new test system provides a temperature signal to a processor that operates a set of valves that control a heater, a cooler, and a heat exchanger for this operation. A pump is connected to circulate water in parallel paths through several test modules and a thermally similar module that has a temperature sensor and is a permanent part of the test system.

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Piping System With Valves Controlled by Processor for Heating Circuit Modules in a Selected Temperature Profile for Sealing Integrity Test Under Temperature Stress

In a known sealing integrity test, circuit modules are heated by circulating hot water through the connections that are normally used for chilled water that removes heat from the modules. The module temperature is raised at a selected rate to a predetermined value, held at this temperature for a selected time interval, and then lowered to room temperature at a selected rate. A new test system provides a temperature signal to a processor that operates a set of valves that control a heater, a cooler, and a heat exchanger for this operation. A pump is connected to circulate water in parallel paths through several test modules and a thermally similar module that has a temperature sensor and is a permanent part of the test system. The processor uses this signal in executing a program to open and close a system of valves to control the module temperature. Water is circulated through the heater to produce a fast rise in the temperature of each module at the beginning of the test. When the modules have reached a temperature that is to be held for a predetermined time, the valves are operated to bypass the first heater. The primary side of the heat exchanger is connectable to either the heater or the cooler. The secondary side of the heat exchanger is connected in parallel with the piping branch from the pump t...