MILDTL28803C
3.5.4.3 Solderability (applicable to solderable terminals). When displays are tested as specified in 4.6.4.3
terminals shall be at least 95 percent covered with a new smooth shiny solder coating. The remaining 5 percent of
the terminal surface may show only small pinholes or rough spots. These shall not be concentrated in one area.
Bare base metal and areas where the solder dip failed to cover the original coating are indications of poor solder
ability.
3.5.4.4 Terminal strength. When displays are tested as specified in 4.6.4.4 there shall be no movement or
loosening of parts, or other mechanical damage.
3.5.5 Electrical characteristics.
3.5.5.1 Dielectric withstanding voltage (DWV). When displays are tested as specified in 4.6.5.1 there shall be no
flashover, arcing, breakdown or current flow in excess of 100 microamperes.
3.5.5.2 Life (electrical). Upon completion of tests specified in 4.6.5.2 displays shall meet the dot-to-dot ratio and
3.5.5.3 Overload. When displays are tested as specified in 4.6.5.3 there shall be no evidence of electrical or
mechanical damage.
3.5.6 Environmental characteristics.
3.5.6.1 Moisture resistance. When displays are tested as specified in 4.6.6.1, there shall be no evidence of
excessive corrosion, breaking, cracking, or other defects detrimental to the intended function of the display. When
displays are tested in the wet condition, the insulation resistance shall not be less than 10 megohms. At the end of
the drying period, the insulation resistance shall not be less than 1,000 megohms. Excessive corrosion is defined as
that which interferes with the electrical or mechanical performance and has penetrated the plating and has attacked
the base material.
3.5.6.2 Salt spray (corrosion). When displays are tested as specified in 4.6.6.2 there shall be no evidence of
excessive corrosion that interferes with the electrical or mechanical performance, penetrates the plating, and attacks
the base material. There shall be no warping, cracking or other damage to the displays.
3.5.6.3 Seal (when applicable).
3.5.6.3.1 Dripproof (45 degrees). When displays are tested as specified in 4.6.6.3.1 there shall be no leakage of
water through the panel seal as determined by visual examination. Following the test, displays shall meet the
dielectric withstanding voltage requirements of 3.5.5.1.
3.5.6.3.2 Immersion. When displays are tested as specified in 4.6.6.3.2 there shall be no leakage of water into the
display as determined by visual examination. Following the test, displays shall meet the dielectric withstanding
voltage requirements of 3.5.5.1.
3.5.6.4 Shock.
3.5.6.4.1 Method I. When displays are tested as specified in 4.6.6.4.1, there shall be no broken, loose, deformed
or displaced parts at the conclusion of the test.
3.5.6.4.2 Method II (when specified). When displays are tested as specified in 4.6.6.4.2, there shall be no
displaced parts and the readout shall be electrically and mechanically operable at the conclusion of the test.
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