MIL-DTL-25446E
4.3.2.2.1 Continuation of individual tests. For production reasons, individual tests may
be continued pending the investigation of an individual test failure. Final acceptance of the
entire lot shall not be rendered until the determination has been made that the lot meets all
requirements of this specification.
4.3.3 Defects in items already accepted. The investigation of a test failure could indicate
that defects may exist in items already accepted. If so, the contractor shall fully advise the
procuring activity of all defects likely to be found and methods of correcting them.
4.3.3.1 Test records. Test records must be available to substantiate the accumulated
production quantities.
4.4 Test conditions.
4.4.1 Standard atmospheric conditions. Unless otherwise specified (see 6.2), all tests are
to be conducted at atmospheric pressure (approximately 29.92 inches of mercury) and at room
temperature (approximately 25 °C (77 °F)). When tests are performed at atmospheric pressure or
room temperature that differ from these values, proper allowances shall be made for the
difference from the specified conditions.
4.4.2 Test fixture. When specified, tests shall be conducted by using a test fixture in
accordance with ASTM E220 with an axial temperature gradient of approximately 37.8 °C
(100 °F) per inch when the temperature at the bottom of the well is 275 °C (527 °F). The
temperature at the bottom of the well shall be determined by means of a master thermometer or
thermocouple located in the fixture wall nearest to the bottom of the well. The temperature
gradient of the fixture shall be determined by the use of an additional thermometer or
thermocouple located 1 inch above the master thermometer/thermocouple.
4.4.3 Thermocouple electromotive force (emf). Corresponding values of temperature
and emf for type J iron-constantan thermocouples are described in ASTM E230.
4.4.4 Test voltage. Unless otherwise specified, the temperature transmitter resistance
shall be measured with an applied voltage of 1.5 ±0.2 VDC.
4.5.1 Examination of product. Each temperature transmitter shall be inspected to
determine compliance with this specification with respect to materials, workmanship, and
marking.
4.5.2 Spring load. The tip of the temperature transmitter shall be fixed and the
temperature transmitter shall be spring-loaded until its length from the tip of the temperature
transmitter to the base of the case is 2.50 inches for the MS24482-1, and 2.00 inches for the
MS24482-2 (see figure 1). The spring load shall be a minimum of 2.50 pounds.
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