MIL-DTL-81963C
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Qualification inspection (see 4.6).
b. First article inspection (see 4.7).
c. Conformance inspection (see 4.8).
4.2 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The
inspections set forth in this specification shall become a part of the contractor's overall inspection system
or quality program. The absence of any inspection requirements in the specification shall not relieve the
contractor of the responsibility for ensuring that all products or supplies submitted to the Government for
acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing
operations, is an acceptable practice to ascertain conformance to requirements; however, this does not
authorize submission of known defective material, either indicated or actual, nor does it commit the
Government to accept defective material.
4.3 Test conditions.
4.3.1 Standard test conditions. Unless otherwise specified, all inspections shall be performed in
accordance with the test conditions specified in the general requirements section of MIL-STD-202.
4.3.2 Temperature conditions of servocomponents under test. Unless otherwise specified in the
applicable general specification, all servocomponents shall be tested under the following temperature
conditions. The condition which will apply to each test will be specified in the applicable general
specification.
4.3.2.1 Temperature, stabilized non-operating. The stabilized non-operating temperature is the
condition of a servocomponent after it has remained unenergized in an environment of any specified
ambient temperature, while shielded from stray air currents for a period sufficient for the servocomponent
to have attained a stable temperature. This shall be determined by the periodic measurement of the dc
resistance of the particular winding specified in the applicable general specification and shall be deemed
to have been attained when the resistance of that winding, measured at five-minute intervals, changes by
less than one-half percent from the preceding measurement.
4.3.2.2 Temperature, stabilized operating. The stabilized operating temperature is the condition of a
servocomponent, mounted on a standard test fixture, in an environment of any specified ambient
temperature after the specified test voltages have been applied to the windings required by the applicable
general specification for a period sufficient for the servocomponent to have attained a stable temperature.
This shall be determined by the periodic measurement of the dc resistance of the particular winding
specified in the applicable general specification and shall be deemed to have been attained when the
resistance of that winding, measured at five-minute intervals, changes by less than one-half percent from
the preceding measurement. The stabilized operating condition may be assumed to be attained after
energization, as specified for a period of one hour.
4.3.3 Test power supplies, etc. The following requirements for each type of servocomponent shall be
specified in the applicable general documents and the specification sheet that cite MIL-DTL-81963 as a
direct reference:
a. Standard test voltage, frequency, waveform and harmonic content.
b. Phase relationship of the test voltages, where appropriate.
c.
Special test equipment.
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