MIL-PRF-94G
3.12 Load life. When resistors are tested as specified in 4.7.9, resistors shall show no evidence of mechanical
damage and the change in total resistance between the initial reading and any subsequent reading shall not exceed
10 percent. The minimum resistance both before and after the test shall not exceed the applicable requirements for
3.13 Moisture resistance. When resistors are tested as specified in 4.7.10, resistors shall show no evidence of
mechanical damage. The maximum change in total resistance of any individual resistor shall not exceed the value
specified in table III. The resistors shall meet the insulation resistance requirement specified in table III and shall
withstand application of the dielectric potential (see 4.7.4) without damage, arcing, or breakdown.
3.14 Low temperature storage. When resistors are tested as specified in 4.7.11, the total resistance shall not
change in excess of 2 percent.
3.15 Low temperature operation. When resistors are tested as specified in 4.7.12, the torque required to effect
rotation of the contact arm shall not be greater than 30 ounce-inches for all styles except RV4 and 48 ounce-inches
for style RV4. The total resistance shall not change in excess of 3 percent.
3.16 Thermal shock. When resistors are tested as specified in 4.7.13, resistor shall show no evidence of
mechanical damage and electrical continuity shall not be affected. Rivets, in any, shall not loosen, and the change in
total resistance of each resistor shall not exceed the values specified (see 3.1).
3.17 Salt spray (corrosion). When resistors are tested as specified in 4.7.14, resistors shall show no corrosion and
shall remain mechanically operative.
3.18 Shock (specified pulse). When resistors are tested as specified in 4.7.15, there shall be no open circuits or
intermittent contacts. The resistance shall not change in excess of 5 percent between terminals 1 and 2 and 2
percent between terminals 1 and 3. There shall be no evidence of mechanical damage.
3.19 Vibration, high frequency. When resistance are tested as specified in 4.7.16, there shall be no open circuits
or intermittent contacts. The resistance shall not change in excess of 5 percent between terminals 1 and 2 and 2
percent between terminals 1 and 3. There shall be no evidence of mechanical damage.
3.20 Fungus. All external materials shall be nonnutrient to fungus growth or shall be treated to retard fungus
growth. The manufacturers shall certify that all external materials are fungus resistant or shall perform the test
specified in 4.7.17. There shall be no evidence of fungus growth on the external surface as a result of the test.
3.21 Immersion (MIL-PRF-94/7 (RV8) only). When resistors are tested as specified in 4.7.18, no more than four
bubbles shall be emitted.
3.22 Resistance to solvents (MIL-PRF-94/7 (RV8) only). When resistors are tested as specified in 4.7.19, there
shall be no evidence of mechanical damage and the marking shall remain legible.
3.23 Soldering. When soldering is employed, only substantially noncorrosive fluxes shall be used, unless it can be
shown that corrosive elements have been satisfactorily removed after soldering. Solder shall not be used primarily
for obtaining mechanical strength. Electrical connections shall be mechanically secure before and electrically
continuous after soldering.
3.24 Marking. Resistors shall be permanently marked with the PIN and manufacturer's name and or trademark. If
space permits, the resistance value shall also be marked. The PIN shall be marked on either the rear or the
periphery of the resistors. There shall be no space between symbols which comprise the PIN. If lack of space
requires it, the PIN may be set in two lines. In this event, the PIN shall be divided between the document number and
the dash number as shown in the following example:
RV2NAY
SD103A
9
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