MIL-PRF-38793C
required by the procedure), and one or more recommended equipment items selected from the
equipment lists specified below:
Army:
EM-0074C
SC 9999-01-SKO
Navy:
NAVAIR 17-35NCE-1
Air Force:
TO 33K-1-100-1-WA-1
3.2.3.1 Calibration equipment table.
3.2.3.1.1 Reference item number. The first column shall include a reference item number
assigned during the preparation of the procedure and the generic or common name for the
equipment.
3.2.3.1.2 Minimum use specifications. The second column shall include the minimum use
specifications (see 6.4.3).
3.2.3.1.3 Equipment selection. The third column shall include one or more examples of
equipment which meets or exceeds the second column minimum use specifications and which
are adequate for the performance of the procedure. Selection of the items in this column shall be
made as described in paragraph 3.2.3.
3.2.3.1.4 Subsequent identification of equipment. Subsequent identification of the calibration
equipment shall be general, so as to facilitate equipment substitution. The calibration equipment
shall be identified by generic terms, (e.g., signal generator, direct voltage source, power meter,
etc.), as long as no confusion exists. Item numbers, where needed for understanding, shall be
used throughout the text.
3.2.3.1.5 Note and footnote. (N) If specified by the acquiring activity, the note and footnote
shown in FIGURE 2 shall be used in all procedures (see 6.2).
3.2.3.2 Measurement system. A measurement system shall be used consisting of all
recommended calibration equipment or combinations thereof. It shall have an uncertainty equal
to or better than one-fourth of the uncertainty of the test instrument for each characteristic tested,
(i.e., a test accuracy ratio (TAR) (see 6.4.5) equal to or better than four-to-one). Measurement
systems of better TAR may be used for reasons of equipment availability, reduced complexity,
or reduced calibration time. If a TAR equal to or better than four-to-one is not feasible because
of state-of-the-art or other technical considerations, the best TAR available shall be used. In
such cases, the actual TAR shall be stated in the procedure. Where several items of equipment
are applicable, preference shall be given to the equipment affording the simplest, quickest, and
most efficient test method.
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