MIL-PRF-22684/8C
3.13 Marking. At the option of the manufacturer, parts may be marked in accordance with method I of
MIL-STD-1285. The PIN, FSCM, date and lot code, resistance value, and tolerance shall be marked on
the parts as in the following example:
M22684/
- PIN
08-1239
12345
- Source code
8401AA
- Date and lot code
910K 2%
- Resistance value and tolerance
If this type marking is used, then the green colored band for TX identification may be omitted. Marking
shall remain legible after all tests.
4. VERIFICATION
4.1 Sampling and inspection. Sampling and inspection procedures shall be in accordance with Group A
inspection and Group B inspection of MIL-PRF-22684 except power conditioning shall be performed on
100 percent of the product supplied under this specification.
4.2 Power conditioning (see 3.12). Resistors shall be tested in accordance with method 108 of MIL-
STD-202. The following details and exceptions shall apply:
a. Measurement before conditioning: DC resistance measured in accordance with paragraph 3.7 of
MIL-PRF-22684.
b. Conditioning procedures: Each resistor supplied under this specification shall be subjected to
power conditioning for a period of 24 hours at 150 percent rated power. Mounting shall be such
that 25 C, +10 C, -5 C ambient air can be circulated around the resistors by means of forced air
with a velocity not exceeding 500 FPM. The maximum applied voltage shall not exceed 500 V
rms.
c. Measurement after conditioning: After power conditioning, the resistors shall be stabilized at
room conditions for a minimum of 2 hours before the dc resistance measurements are made.
Resistors that are outside of the tolerance limit and those that have changed more than 0.5
percent due to the conditioning shall be removed from the lot. When the combined quantity
removed exceeds 10 percent of the lot, the entire lot shall be rejected. The supplier shall have a
complete record available of all test results obtained during power conditioning testing (see
ordering data).
4.3 TX identification. Resistors procured to, and meeting all of the criteria specified herein shall bear a
green colored band in place of the band "E" in accordance with appendix B to MIL-PRF-22684. The
symbol "TX" shall be printed at one of the locations specified below:
a. Preferred: On the green colored band described above.
b. On the packing which packaged the items in groups.
In the event the resistor sample fails to meet the requirements of MIL-PRF-22684 and this specification
sheet, the manufacturer shall remove the green band from the sample tested and also from all the
resistors represented by the sample.
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