Combined temperature and salt-spray validation for airborne electronics

Background

The institute runs environmental qualification for airborne electronic assemblies and needed to cover the temperature, damp-heat and salt-fog items of GJB 150A in one laboratory, with the measurement uncertainty documentation the programme requires.

Solution

Temperature-humidity chambers covering −70 to +150 °C and 20–98 %RH, plus a salt-spray chamber running 5 % NaCl at 35 °C. Both were delivered with calibration certificates traceable to national standards and with the uniformity survey reports needed for the qualification dossier.

Implementation and validation

Acceptance testing covered nine-point uniformity surveys at three set points, humidity verification, and a full salt-fog run. All results fell inside the GJB 150A tolerance bands, and the documentation was accepted by the programme reviewer without follow-up.

Outcome

Three test items that previously required external facilities are now run in-house, shortening the qualification cycle and keeping test records under the institute's own control.