MIL‐DTL‐3241F
4.10.2 The hardness of the reel heads shall be tested in accordance with ASTM E10 or ASTM E18 for
compliance with 3.2. The test shall be made before paint is applied.
4.11 Moisture resistance test. The reel shall be subjected to fifteen continuous 48 hour moisture
resistance cycles. A single cycle shall consist of Steps 1 through 8. The relative humidity shall be
maintained between 90 and 98 percent at all times throughout each cycle and during the first conditioning
period. The actual temperature of the conditioning periods and during each cycle at steps 2, 4, 6 and 8
shall be within 3 degrees F of the temperature specified.
Condition the reel at 86 degrees F for 24 hours before test.
Step 1. Raise the internal chamber temperature from 86 to 149 degrees F at
a rate of not less than 15 degrees F per hour.
Step 2. Maintain the temperature at 149 degrees F for 8 hours.
Step 3. Lower the temperature from 149 to 86 degrees F at a rate of not less
than 15 degrees F per hour.
Step 4. Maintain the temperature at 86 degrees F for 20 hours.
Step 5. Lower the temperature from 86 to 68 degrees F within 2 hours.
Step 6. Maintain the temperature at 68 degrees F for 4 hours.
Step 7. Raise the temperature from 68 to 86 degrees F within 2 hours.
Step 8. Maintain the temperature at 86 degrees F for 4 hours.
After completion of the fifteen cycles, condition the reel at 73 degrees F and between 40 and 60 percent
relative humidity for 24 hours. Then inspect the reel for any evidence of corrosion or other deterioration.
The reel shall meet the requirements of 3.8.
4.12 Dielectric strength test for Reel DR-3( ). Reel DR-8( ) shall be tested as follows for compliance
with 3.9:
a. Apply a potential of 500 volts rms, 60 hz, for 1 minute between each binding post of connector
M-221 and the unfinished inside of the reel hub.
b. Apply a potential of 500 volts rms, 60 hz, for 1 minute between the two binding posts of
connector M-221
5. PACKAGING.
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging
activities within the Military Service or Defense Agency, or within the military service's system commands.
Packaging data retrieval is available from then managing Military Department's or Defense Agency's
automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.
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