MIL-PRF-11430F
3.5
4.4.8
INTERFACE AND INTEROPERABILITY
REQUIREMENTS
4.2 Verification methods. Verification methods can include visual examination, measurement,
testing, certification and similarity to previously-approved or previously-qualified designs.
4.2.1 Verification alternatives. The manufacturer may propose alternative test methods,
techniques, or equipment, including the application of statistical process control, tool control, or
cost-effective sampling procedures to verify performance. See the contract for alternatives that
replace verifications required by this specification.
4.3 Operating requirements verification. All user requirements shall be verified as follows:
4.3.1 Color examination. Visually inspect the insulating case color for similarity to the
standard color samples, as specified in the contract or purchase order (see 6.6).
4.3.2 Means of carrying verification. The insulated case shall be visually inspected to verify
that the design is such that an individual can lift or carry the insulated case with the water can
inserted.
4.3.3 Accessibility to water can test. A 5-gallon water can shall be inserted in the insulating
case and the cover closed. Don a pair of arctic mittens and open the cover to access the water
can. With mittens on, close and seal the cover of the insulating case. Opening and closing of the
insulated case cover, with mittens on, shall not exceed 20 seconds for each function.
4.3.4 Safety certification. A certificate shall be provided, verifying that the materials used for
the outer shell and insulation of the case, do not pose a fire or toxic hazard.
4.3.5 Insulation of 5-gallon water can verification. The insulated case with a full 5-gallon
water can inserted, shall be placed in a freezer unit set at - 40o F for 20 hours. The starting
temperature of the water shall be approximately 50o F. At the end of 20 hours, remove the
insulated case and water can from the freezer and pour the water into gallon containers. At least
4 gallons of water shall be liquid.
4.4 Support or ownership requirements verification. All support or ownership
requirements shall be verified as follows:
4.4.1 Weight examination. Verify, by weighing, that the insulated case weighs no more than
ten pounds.
4.4.2 Thickness examination. Verify, by measuring, that the outer material and insulation
material combined, do not exceed a thickness of 1 1/2 inches.
4
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