MILDTL28803C
4.6.6.3.1 Dripproof (45 degrees). With the display mounted by its normal mounting means, the readout shall be
subjected to the dripproof test of MILSTD108 with a 5 gallon (18.9 l) quantity of water flowing over the specimen for
5 minutes duration. The water shall be directed within 12 inches (30.5 cm) above the test specimen. Following the
test, the dielectric withstanding voltage shall be measured as specified in 4.6.5.1.
4.6.6.3.2 Immersion. With the display mounted by its normal mounting means, the readout shall be subjected to
procedure I of test method 512 of MILSTD810. Following the test, the dielectric withstanding voltage shall be
measured as specified in 4.6.5.1.
4.6.6.3.2.1 Alternate test. Upon receiving approval by the qualifying activity, test condition A of method 104 of
MILSTD202 may be used in lieu of testing protocol of MILSTD810.
4.6.6.4 Shock (see 3.5.6.4). Displays shall be tested as specified in 4.6.6.4.1, method I, and in addition, when
specified (see 3.1), displays shall also be tested as specified in 4.6.6.4.2, method II. The following details and
exceptions shall apply:
4.6.6.4.1 Method I. Displays shall be tested in accordance with method 213 of MILSTD202. The following
details shall apply:
a.
Mounting means: Displays shall be mounted on a rigid metal panel by their normal mounting means.
b.
Test condition A.
c.
Measurement after test: Displays shall be examined for evidence of broken, deformed or displaced parts.
4.6.6.4.2 Method II. Displays shall be tested in accordance with method 207 of MILSTD202. The following
details shall apply:
a.
Mounting means: Displays shall be mounted on the standard mounting fixture detailed in method 207 of
b.
Measurement after test: Display shall be electrically operable.
4.6.6.5 Thermal shock (see 3.5.6.5). Displays shall be tested in accordance with method 107 of
MILSTD202. The following details shall apply:
a.
Test condition A.
b.
Measurements before and after cycling: Not applicable.
c.
Examinations after test displays shall be examined for mechanical and electrical damage and loosening of
fastening devices and discoloration or damage to lenses.
4.6.6.6 Vibration (see 3.5.6.6). Displays shall be tested in accordance with MILSTD202. The following details
and exceptions shall apply:
a.
Test condition:
(1) For vibration grade 1: Method 201 (10-55 Hz).
(2) For vibration grade 2: Method 204, test condition A (10-500 Hz).
(3) For vibration grade 3: Method 204, test condition B (10-2000 Hz).
b.
Tests and measurements prior to vibration: Not applicable.
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