MIL-R-10509J
e. Final measurements: Upon completion of step 6 of the final cycle, the resistors shall be held at the high humid conditions and at a temperature of 25°C ±2°C for a period of 1.5 hours to 3.5 hours. The same straps used for polarizing the resistors may also be used for the dielectric withstanding voltage test and insulation resistance tests. Resistors shall be removed from the chamber and within 0.5 hour, the dielectric withstanding voltage, insulation resistance, and dc measurement tests shall be performed as specified in 4.7.8.1, 4.7.9, and 4.7.2 respectively. The sample units shall not be subjected to forced circulation air during tests.
f. Examination after test: Resistors shall be examined for evidence of mechanical damage.
4.7.12 Resistance temperature characteristics (see 3.17). Resistors shall be tested in accordance with method 304 of MIL-STD-202. The following details and exceptions shall apply:
a. Reference temperature: Room ambient temperature. b. Test temperature: In accordance with table X.
TABLE X. Resistance temperature characteristic.
Sequence |
Temperature (°C) |
|
Qualification inspection |
Group B inspection 1/ |
|
1 2 3 4 5 6 7 |
Room temperature 2/ -15 ±3 -55 ±3 Room temperature 2/ 65 ±3 165 ±3 3/ 175 ±3 4/ |
Room temperature 2/ -55 ±3 Room temperature 2/ 165 ±3 3/ 175 ±3 4/ |
1/ At the option of the manufacturer, the reverse sequence may be as follows:
1. Room temperature 2/.
2. 175 ±3 4/
3. 165 ±3 3/
4. Room temperature 2/
5. -55 ±3
2/ This temperature shall be considered the reference temperature for each of the succeeding temperatures.
3/ Characteristic G only.
4/ Characteristic C, D, E, and F only.
c. Accuracy of temperature measurement: Resistors shall be maintained for 30 to 45 minutes within
1°C at each of the test temperatures listed in table X. This tolerance shall be maintained on the established test temperatures.
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