MIL-DTL-24640/24E
Blocking
Oven temperature, 150±2 °C (302±3.6 °F) no sticking of
conductors
Flammability
3 seconds (max.) after flame
3.0 inches (max.) flame travel
No flaming of tissue paper
Humidity resistance
5 megohms for 1000 feet (min.) insulation resistance after
humidity exposure
Impulse dielectric test
100 percent test, impulse voltage at 8.0 kV
Insulation resistance
2500 megohms for 1000 feet (min.)
Polyimide cure test
No cracking
Shrinkage
0.062 inch (max.) at 180 °C
Surface resistance
5 megohms inches (min.), initial and final readings
Thermal shock
Oven temperature, 150±2 °C (302±3.6 °F)
Maximum change in measurement
0.031 inch
Wet dielectric test
2500 volts (root mean square)
INSPECTION:
Basic Electricals:
Conductor resistance (ohms/1000 feet at 25 °C, max.)
17.54
Voltage withstand (volts, root mean square, min.)
Conductor to conductor
2000
Conductor to shield (TTXOW only)
1000
Shield to shield
Not applicable
Insulation resistance (megohms/1000 feet, min.)
Conductor to conductor
2500
Conductor to shield (TTXOW only)
2500
Shield to shield (component shield only)
Not applicable
Shield to shield (component shield to overall shield)
Not applicable
Conductor and shield continuity (Type TTXOW only)
No failure
Jacket flaws (Type TTXOW only)
No failure
Group A:
Visual and dimensional
No failure
Capacitance
Mutual capacitance (at 1 MHz, picofarads/foot (pF/ft), max.)
Not applicable
Capacitance unbalance (percent, max.)
Not applicable
3
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