MIL-DTL-27723F
4. VERIFICATION
4.1 Classifications of inspection. The inspection requirements specified herein shall be
as follows:
a. First article inspection (see 4.3)
b. Acceptance tests (see 4.4)
4.2 Test conditions. Unless otherwise specified, the probe shall be tested in air at
standard conditions at room temperature (approximately 25°C) and at sea level pressure
(approximately 760 mm Hg).
4.2.1 Calibration stability. During the course of the tests, a change in calibration which
does not meet the requirements of 3.5.2.1 shall constitute failure. This does not imply
compulsory calibration after each test.
4.2.2 Current measurement. All resistance measurements shall be made so that the
current flowing through the temperature-sensing element will be of such magnitude the self-
heating effect will not exceed 0.1°C.
4.3 First article inspection.
4.3.1 First article test samples. The first article test samples shall consist of three probes
representative of the production equipment. The probes shall be identified with the
manufacturer's part number and other information as required by the procuring activity. A test
Sample shall be furnished to the procuring activity (see 6.2).
4.3.2 Test report and test sample. When the tests are conducted at location other than the
laboratory of the procuring activity, the following shall be furnished to that activity:
a. Test report, three copies of the test report. MIL-HDBK-831 may be used for
guidance.
b. Test sample, the sample that was tested.
4.3.3 First article tests. The first article tests shall consist of all the tests specified in 4.6.
4.4 Acceptance tests. Acceptance tests shall consist of:
a. Individual tests (4.4.1)
b. Sampling tests (see 4.4.2)
4.4.1 Individual tests. Each probe shall be subjected to the following tests as described
under 4.5.
a. Examination of product (see 4.6.1)
b. Temperature-resistance (see 4.6.2)
c. Insulation resistance of temperature-sensing element (see 4.6.3)
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