MIL-DTL-18396E
(c) Contact monitoring All contacts of the switch shall be monitored during the exploratory vibration and
endurance tests except when the number of closed contacts exceeds 6, or when the number of open contacts
exceeds 4, only 6 closed and 4 open contacts need to be monitored. In such instances the contacts monitored
shall be equally distributed (approximately) from the front to the rear of the switch.
Oscillographs shall be taken during the last minute of the final tests along each principal axis to determine
conformance with 3.5.4.11.
(d) Electrical load conditions Closed contacts to be tested shall be carrying maximum rated continuous current
at rated voltage.
(e) Examination After test, the switches shall be examined for evidence of mechanical damage or loosening of
parts.
4.7.10 High impact shock (see 3.5.4.12). High impact shock tests shall be conducted in accordance with MIL-S-901
for grade A, class I, type C equipment. The following shall apply:
(a) Method of mounting Fixture 6D-1 of MIL-S-901.
(b) Switch position (See 4.7.9(b)).
(c) Contact monitoring The number of contacts to be monitored shall be in accordance with 4.7.9(c). The coil of
a relay calibrated for the test voltage, and having a dropout time of 0.02 seconds shall be connected in series
with the closed contacts. In lieu of the relay coil, a recording oscillograph or other means may be utilized to
monitor the closed contacts. In addition, the oscillograph or other means shall be used to monitor the open
contacts. The monitoring means shall be sufficiently sensitive to detect momentary opening of the closed
contacts or momentary closing of the open contacts, in excess of 0.02 seconds.
(d) Electrical load conditions The current and voltage on the contacts shall be sufficient to detect momentary
opening or closing of the contacts through the monitoring device.
(e) Examination After test, the switches shall be examined for evidence of mechanical damage or loosening of
parts.
4.8 Inspection of preparation for delivery. The packaging, packing, and marking shall be inspected for compliance
with section 5 of this document.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order
(see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
6.1 Intended use. The switches covered by this specification are intended for use in power, control and metering
circuits where reliability and ruggedness are required for Naval shipboard applications.
6.2 Ordering data.
6.2.1 Procurement requirements. Procurement documents should specify the following:
(a)
Title, number and date of this specification.
(b)
Type of switch required (see 1.2).
(c)
(d)
(e)
Whether shorting or nonshorting contacts are required (see 3.5.1.3).
(f)
When a spring return action is specified (see 3.5.4.2).
(g)
Whether momentary, detent, or push-pull operation is required (see 3.5.4.4).
(h)
Position indication and marking (see 3.7).
(i)
Repair parts required (see 3.9)
.
(j)
Quantity of drawings required (see 3.10).
(k)
Quality assurance requirements (see 4.1.1).
(l)
Level of preservation, packaging, packing and marking required (see 5.1).
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