MIL-DTL-28827C
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are classified as follows
a. Materials inspection (see 4.3).
b. Qualification inspection (see 4.5).
c. Conformance inspection (see 4.6).
4.2 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities of
sufficient accuracy, quality and quantity to permit performance of the required inspection shall be
established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment shall be in accordance with ISO-
10012-1 and NCSL Z540-3.
4.3 Materials inspection. Materials inspection shall consist of certification supported by verifying data
that the materials listed in table I, used in fabricating the switches, are in accordance with the applicable
referenced specification or requirements prior to such fabrication.
TABLE I. Materials inspection.
Requirement
Component material
Applicable specification
paragraph
Fungus resistant
3.3.1
Aluminum
3.3.2.3
J-STD-004, J-STD-005, and J-STD-006
Solder
3.3.2.4
J-STD-004, J-STD-005, and J-STD-006
Solder flux
3.3.2.4
Plastic
3.3.3.1
Ceramic
3.3.3.2
Potting compounds
4.4 Inspection conditions. Unless otherwise specified herein, all tests and measurements required by
this specification shall be made at room ambient conditions, in accordance with the MIL-STD-202.
4.5 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to
the Government (see 6.2) on sample units produced with equipment and procedures normally used in
production.
4.5.1 Sample size. Twelve switches shall be subjected to qualification inspection.
4.5.2 Inspection routine. The sample shall be subjected to the inspection specified in table II, in the
order shown. Sample units shall be grouped as shown in table II.
4.5.3 Failures. One or more failures shall be cause for refusal to grant qualification approval.
4.5.4 Extent of qualification.
4.5.4.1 Single submission. Qualification shall be restricted to the switch submitted.
4.5.4.2 Group submission. If samples satisfactorily pass the qualification inspection, other switches
from the same manufacturer that have the same operation or reverse operation, and the same design,
construction, switching characteristics, and physical dimensions will be considered qualified by the
Government without further qualification inspection.
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