MIL-HDBK-1839A
Interpretive guidance: MIL-HDBK-300 is available to assist in selection of TMDE thereby aiding
in the nonproliferation of SE. Experience has shown that the effective interrelationship of concurrent engineering and logistics planning support the awareness of traceability requirements and the implementation of cost effective and technically adequate measurement traceability. To realize maximum benefit, CMRS development should be an integral part of this concurrent engineering effort.
"5.1.1.3 Description of items. The system, subsystem, or equipment that has parameters that require measurement shall be identified by nomenclature, manufacturer and manufacturer's code, part or model number, and type designation. If an item does not have an approved part number, but does have an approved or proposed end item specification number or system number, that number shall be referenced. Each requirement shall identify:
a. Function: The function (specific input, output, or other characteristic which has units of measurement such as volts, frequency, power, current, length, force, etc.) which will be measured, tested, checked, or adjusted to determine or maintain the item's operational condition.
b. Operational range or specific value: The range of values or actual value that shall be measured to satisfy operational requirements.
c. Operational tolerance: The tolerance of the range or specific value within which the equipment is required to perform to meet operational specifications."
Interpretive guidance: The system requirements should be based on operational tolerances instead of design tolerances since any differences in tolerance can have an impact on calibration intervals and the required accuracies in the traceability chain.
"d. Interval: The design activity shall recommend a maximum time lapse between tests or other method of scheduling tests."
"5.2 Built -In Test and Built -In Test Equipment. For parameters of BIT and BITE, or other internal measurements which are part of the operational equipment requiring test or measurement, the nomenclature, manufacturer or code, part number or model number, range and accuracy of the operational equipment shall be identified, as well as the parameters being monitored or generated. When built-in references are employed, a method of test or measurement shall be identified or, if not required, a narrative justification shall be documented."
Interpretive guidance. Weapon System SE that make quantitative measurements or provides known stimuli requires calibration. Advances in technology have resulted in reduction in the use of conventional SE in favor of BIT and BITE. It should be recognized that this does not alter the calibration requirement and that BIT and BITE, which makes quantitative measurements or provides known stimuli, require calibration just as does any other SE. Without calibration, traceability can
not be maintained and out of tolerance conditions may not be detected. The result of not calibrating
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