MIL-DTL-15291G
TABLE III. Qualification inspection for SRN classes.
1,2
Sample Number
Test
Inspection
Requirement
method
1
2
3
4
5
6
7
General Examination
1
1
1
1
1
1
1
Operation
2
2
2
2
2
2
2
Momentary position
3
3
3
return
Stop strength
4
4
4
3.6.2
5
Salt spray
3.6.3
Vibration
5
3
3.6.4
6
Shock
4
7
5
Dielectric with-
5
3
3
standing voltage
Overload
6
8
6
Contact resistance
7
4
4
7
Endurance, ac
5
8
Temperature rise
6
9
9
Insulation resistance
8
5
7
6
10
10
3
Operation
9
6
8
General Examination
9
11
10
4
7
7
11
1
Samples for qualification of class 1SRN switches shall be of the following types:
Samples 1,2 and 4 - M15291/4-001
Samples 3 and 5 - M15291/4-006
Samples 6 - M15291/4-004
Samples 7 - M15291/4-002
2
When qualifying both class 1SR and 1SRN only, samples 1,2,and 7 for 1SRN are required to be
tested in addition to samples in Table II.
TABLE IV. Group A inspection.
Inspection
Requirement
Test method
General examination
Operation
Momentary position return (where applicable)
Dielectric withstanding voltage
4.4.4 Group B inspection. Group B tests and examination shall be as specified in table VI. Whenever
the manufacturer has had no production for the switch class in the 12- or 24-month period, the samples
shall be selected from the first production run following this period.
4.5 Acceptance - groups B. The results of each test shall be compared with the specification
requirements. In the event of failure to conform to this specification for any of the applicable tests, the
contractor shall correct the cause of failure on future production units and shall repair the deficiency on all
undelivered switches produced on the contract or order. Quality conformance inspection shall be
discontinued until corrective action has been taken. After the corrective action, sample units shall be
subjected to the necessary group B inspection (all tests or the failed tests, at the option of the inspector).
Group A inspection, may be reinstituted; however, final acceptance shall be withheld until the group B, as
applicable, has shown that the corrective action was successful.
10
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