FED-STD-228A
5. RESULTS
5.1 Calculation. The dielectric strength of cloth or tape at the point measured shall be calculated as
follows:
Dielectric strength, volts per mil = V
T
where:
V=the puncturing voltages at the point measured, volts
T=the thickness near the point of puncture, mils
5.2 Unless otherwise specified in the detail specification, one specimen from each inspection unit shall
be tested.
5.3 The average breakdown voltage of the tape shall be the average of the five tests made on the
specimen.
5.3.1 When more than one specimen is tested from each inspection unit, the average breakdown voltage
of the cloth or tape shall be the average of the results obtained from the specimens tested.
5.4 The minimum breakdown voltage of the cloth or tape shall be the smallest of all the values averaged
in determining the average breakdown voltage, 5.3.
5.5 The average and minimum dielectric strength of each tape tested shall be recorded to the nearest 50
volts per mil of thickness.
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