MIL-PRF-38793C
b. A characteristic shall not be adjusted when the measurement of that characteristic is
within tolerance.
c. The calibration process shall be repeated for that characteristic, if a characteristic is
adjusted.
3.2.5.6 Verification and corrective action. The following note shall be placed at the beginning
of Section IV:
NOTE
Unless otherwise specified, verify the results of each test and take
corrective action whenever the test requirement is not met, before
proceeding."
In those cases where an individual measurement will be affected by a corrective action, the
following instruction shall be added: "Do not take corrective action until step ____ has been
performed."
3.2.5.7 Calibration curves and charts. Instructions for preparation of calibration curves, charts,
and tables shall be included, when required, for the use of the test instrument.
3.2.5.8 Performance limits. Performance limits shall be included in the text wherever
instructions for tests or measurements appear. When a series of related measurements are
indicated, the performance limits shall be shown in tabular form. Limits shall conform to the
following:
a. Performance limits shall be expressed in the same units as nominal values whenever
feasible.
b. Tolerances shall be expressed as upper and lower limits (for example, 49 to 51 volts),
rather than plus or minus a quantity or percentage. Where the nominal value is not
predictable, or is derived during calibration, the tolerance shall be given as plus or
minus a quantity, rather than plus or minus a percentage of the nominal value.
c. Performance limits shall be expressed as single minimum or maximum values (for
example, 2 cm min.) when required by the test instrument specification.
d. Nominal values and performance limits shall be expressed in the same units as the
expected test data. Nominal values shall be omitted for quantities such as distortion,
noise, ripple, etc., and quantities which are ideally zero. The processing of data or
other computations, when required, shall be simplified as much as possible.
3.2.6 Calibration performance tables (CPT). When the technical specifications are not
summarized in the procedure, each calibration procedure shall include a calibration performance
table (CPT).
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