MIL-DTL-12285F
6 NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. The switches covered by this specification are intended primarily for use in the
lubricating oil of air-cooled, internal combustion engines to warn of excessive lubricating oil temperatures.
However, if designed and built for other operating conditions, they may be used to warn of excessive
temperatures in other fluids.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a.
Title, number, and date of this specification.
b.
If required, the specific issue of individual documents referenced (see 2.1.1).
c.
Military part number (see 3.6).
Switching temperature (see 3.6).
d.
e.
Applicable drawing (see 3.6).
f.
Responsibility and place of inspection if other than specified (see 4.1).
g.
Selection of applicable level and packaging requirements (see 5.1).
6.3 Qualification. With respect to products requiring qualification, awards will be made only for
products which are, at the time of award of contract, qualified for inclusion in Qualified Products List
(QPL) whether or not such products have actually been so listed by that date. The attention of the
contractors is called to these requirements, and manufacturers are urged to arrange to have the products
that they propose to offer to the Federal Government tested for qualification in order that they may be
eligible to be awarded contracts or orders for the products covered by this specification. Information
pertaining to qualification of products may be obtained via email to vqp.chief@dla.mil or from the DLA
Land and Maritime, Attn: VQP, 3990 East Broad Street, Columbus, OH 43213-1199. ). An online listing of
products qualified to this specification may be found in the Qualified Products Database (QPD) at
6.4 Definitions.
6.4.1 Recovered materials. "Recovered materials" means materials that have been collected or
recovered from solid waste (see3.3.2).
6.4.1.1 Solid waste. "Solid waste" means (a) any garbage, refuse, or sludge from a waste treatment
plant, water supply treatment plant, or air pollution control facility; and (b) other discarded material,
including solid, liquid, semisolid, or contained gaseous material resulting from industrial, commercial,
mining, and agricultural operations, and from community activities. It does not include solid or dissolved
material in domestic sewage, or solid or dissolved material in irrigation return flows or industrial
discharges which are point sources subject to permits under section 402 of the Clean Water Act, (33
U.S.C. 1342 et seq.), or source, special nuclear, or byproduct material as defined by the Atomic Energy
Act or 1954 (42 U.S.C. 2011 et seq.) (Source: Federal Acquisition Regulations, section 23.402).
6.4.2 Critical frequency. Critical frequency is a resonant frequency developed in the transmitter such
that amplitude exceeds that of the applied vibration. The greater the amplitude the more highly loaded
the transmitter and the more critical the vibration environment.
6.4.3 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may
exhibit tin whisker growth problems after manufacture. Tin whiskers may occur anytime from a day to
years after manufacture and can develop under typical operating conditions, on products that use such
materials. Conformal coatings applied over top of a whisker-prone surface will not prevent the formation
of tin whiskers. Alloys of 3 percent lead, by mass, have shown to inhibit the growth of tin whiskers. For
additional information on this matter, refer to ASTM-B545 (Standard Specification for Electrodeposited
Coatings of Tin).
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