MIL-DTL-13484G
4.3 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be conducted
under the following condition.:
a. Air temperature 23 ± 10șC.
b. Barometric pressure 724 + 51, -76 mmHg.
c. Relative humidity 50 + 30 percent.
4.3.1 Switch cycling frequency. Switch cycling frequency shall be 15 cycles per minute with 2.0 + 0.2
seconds on and 2.0 + 0.2 seconds off. The ends of the leads shall be sealed as necessary to prevent
entry of moisture, salt or fungus through the ends.
4.4 Qualification inspection. A qualification sample of nine switches of each type and class to be
qualified shall be furnished for qualification inspection. The samples shall be representative of switches
proposed to be furnished under the contract. Qualification inspection shall be performed at a laboratory
acceptable to the Government (see 6.3), on sample units produced with equipment and procedures
normally used in production, and shall consist of inspections specified in 4.6.1 and test as specified in
table I in the order listed.
4.4.1 Failure. Failure of any switch to comply with the applicable requirements shall be cause for
refusal to grant qualification.
4.4.2 Verification of qualification. Every 12 months, the manufacturer shall provide verification of
qualification to the qualifying activity. Continuation is based on meeting the following requirements:
a. Design of the switch has not been modified (every 12 months).
b. Verification of group A lot acceptance (every 12 months) (see 4.5.2)
c. Periodic group B inspection (every 36 months) (see 4.5.3).
4.5 Conformance Inspection. Inspection of product for delivery shall consist of group A inspection.
4.5.1 Inspection lot. An inspection lot shall consist of all category I and category II switches of the
same specification sheet, of the same enclosure requirement, temperature characteristic and interface
and dimensions, produced under essentially the same conditions and offered for inspection at one time. .
4.5.2 Group A inspection, Group A inspection shall consist of the inspections specified in table II. The
inspection may be performed in any order.
4.5.2.1 Sampling plan. Statistical sampling shall be in accordance with table III. For acceptance of the
lot, there shall be zero occurrences of defects.
4.5.2.2 Rejected lots. If an inspection lot is rejected, the lot shall be 100 percent inspected for the
defects noted. The contractor may correct the defects or remove all of the defective units from the lot. The
lot shall then be sampled again in accordance with table III. For acceptance, there shall be zero
occurrences of defects. If one or more defects are found in the second sample, the lot shall be rejected and
shall not be supplied to this specification. Such lots shall be separate from new lots and shall be clearly
identified as reinspected lots.
4.5.3 Periodic inspection. Periodic inspection shall consist of group B. Except where the results of
these inspections show noncompliance with the applicable requirements (see 4.5.3.1.3), delivery of
products which have passed group A shall not be delayed pending the results of these periodic inspections.
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