MIL-DTL-87104C
4.6.4.13.1.3 Accept-reject criteria (procedure I) (see 3.5.3.15). If at any time during the initial test cycle, or if
applicable, the retest cycle, the coaxial assembly has a vapor leakage greater than that specified in the detail
specification, the unit under test shall be considered to have failed the vapor leakage test.
4.6.4.13.2 Procedure II (immersion-leakage test).
4.6.4.13.2.1 Test setup.
4.6.4.13.2.1.1 Test equipment. An altitude chamber, or equivalent, and a tank of water shall be required.
4.6.4.13.2.1.2 Test conditions. The test conditions shall be as specified herein. Unless otherwise specified in the
detail specification, the coaxial assembly shall be immersed in tap water open-ended.
4.6.4.13.2.2 Procedural steps. Procedure II shall be conducted in accordance with the following steps:
Step 1: Subject the coaxial assembly to examination of product, procedure II (see 4.6.1.2).
a.
Step 2: Subject the coaxial assembly to VSWR, procedure II (see 4.6.2.1.2).
b.
c.
Step 3: Immerse the coaxial assembly in tap water and place in the altitude chamber.
d.
Step 4: Reduce the absolute pressure of the air above the liquid to approximately 1 inch of mercury and
maintain for 10 minutes, or until air bubbles substantially cease to be given off by the liquid, whichever is
longer. Increase the absolute pressure to 2.5 inches of mercury and maintain for 15 minutes.
e.
Step 5: After the chamber has been allowed to return to ambient pressure, remove the coaxial assembly
from the chamber and dry with a clean, lint-free cloth.
f.
Step 6: Subject the coaxial assembly to VSWR, procedure II.
Step 7: Subject the coaxial assembly to examination of product, procedure IV (see 4.6.1.4).
g.
4.6.4.13.2.3 Accept-reject criteria (procedure II) (see 3.5.3.15). The test sample shall be considered as having
passed the immersion-leakage test if:
a.
There was no evidence of bubbles coming from within the equipment while submerged.
b.
The coaxial assembly successfully passes the accept-reject criteria specified in 4.6.2.1.2.5 and 4.6.1.4.1.
4.6.4.13.3 Procedure III (leakage test).
4.6.4.13.3.1 Test setup.
4.6.4.13.3.1.1 Test equipment. An altitude chamber, or equivalent, and a tank of water shall be required.
4.6.4.13.3.1.2 Test conditions. The test conditions shall be as specified herein. Unless otherwise specified in the
detail specification, the coaxial assembly shall be immersed in tap water without a cover on connectors.
4.6.4.13.3.2 Procedural steps. Procedure III shall be conducted in accordance with the following steps:
a.
Step 1: Completely immerse the coaxial assembly in tap water and place in the altitude chamber.
b.
Step 2: Reduce the absolute pressure of the air above the liquid to approximately 1 inch of mercury and
maintain for 10 minutes, or until air bubbles substantially cease to be given off by the liquid, whichever is
longer. Increase the absolute pressure to 2.5 inches of mercury and maintain for 15 minutes.
c.
Step 3: After the chamber has been allowed to return to ambient pressure, remove the coaxial assembly
from the chamber and dry with a clean, lint-free cloth.
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