MIL-PRF-24794A
TABLE VI.
Operating temperature test schedule.
Step
Temperature
Duration
1
Maintain room ambient
4 hours(min)
O
O
O
2 hours
2
Ramp to -28 C +0 C, -3 C
O
O
3
2 hours (min)
Maintain -28 C +0 C, -
O
O
O
2 hours
4
Ramp to 25 C + 2 C
O
O
2 hours (min)
5
Maintain 25 C + 2 C
O
O
O
2 hours
6
Ramp to 85 C +3 C, -0 C
O
O
O
7
2 hours (min)
Maintain 85 C +3 C, -0 C
O
O
8
2 hours
Ramp to 25 C + 2 C
4.6.5 Flow resistance (see 3.5.6). The index matching material shall be
tested as follows. A glass microscope slide shall be cleaned using soapy
water, rinsed in deionized water, rinsed in acetone, and dried using a clean
lint free cloth. A line shall be drawn across one side of the slide, using a
permanent ink marker, dividing the side of the slide into two parts of
approximately equal area. One to two grams of index matching material shall
be applied to slide so that the material just touches the edge of the line.
The slide shall be placed in a vertical position with the index matching
material above the permanent line. The slide shall be maintained at a
O
temperature of +100 C for 24 hours. The slide shall be returned to room
ambient temperature and then visually examined for conformance with the
requirements of 3.5.6.
4.6.6 Water absorption (see 3.5.7). The index matching material shall
O
exposed to 100 percent humidity at +35 C for 24 hours (refer to ASTM D570 for
guidance). After exposure the material shall be tested in accordance with
4.6.1.
4.6.7 Identification and marking (see 3.5.8). The index matching material
containers shall be visually examined for conformance with the requirements of
3.5.8.
4.6.8 Workmanship (see 3.5.9). The index matching material shall be
visually examined for conformance with the requirements of 3.5.9.
4.6.9 Fungus resistance (see 3.5.10). Index matching materials not listed
as fungus inert in guideline 4 of MIL-HDBK-454 shall be tested in accordance
with TIA/EIA-455-56.
8
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