Accession Number:

ADA252282

Title:

Liquid Environmental Stress Screening

Descriptive Note:

Final rept. Oct 1988-Aug 1990,

Corporate Author:

NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA

Personal Author(s):

Report Date:

1992-05-01

Pagination or Media Count:

12.0

Abstract:

This report describes a method of performing Environmental Stress Screening in an inert fluid. Because the liquid has a high dielectric strength, the items being screened can be energized and operational while submerged. Transmitting vibrations through the liquid to the item being screened permits screening without the use of fixtures, and the liquids high heat capacity allows very rapid temperature changes, either by pumping hot or cold liquid from remote reservoirs or by moving the device from a hot tank to a cold tank. A prototype screening system has been built at NRaD, and faults induced in a small 47 pieces lot of printed wiring boards have been detected.

Subject Categories:

  • Electricity and Magnetism
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE