MIL-C-62F
4.5.13 Stability at low and high temperatures (see 3.16). The measurements specified in table VIII shall be made
in the order shown. The capacitors shall be brought to thermal stability. Thermal stability will have been reached
when no further change in capacitance is observed between two successive measurements taken at 15-minute
intervals.
TABLE VIII. Temperatures and measurements for stability
test at low and high temperatures.
Step
Temperature
Test
Method
paragraph
1
DC leakage
25 3C
Capacitance
Dissipation factor
-40 -3 +0C
2
Impedance
3
DC leakage
25 3C
Capacitance
Dissipation factor
4
DC leakage 1/
85 +3 -0C
Capacitance
Dissipation factor
5
DC leakage
25 3C
Capacitance
Dissipation factor
1/ DC leakage measurement not required for styles
CE63 and CE64.
4.5.14 Surge voltage (see 3.17). Capacitors shall be subjected to 1,000 cycles of the dc surge voltage specified in
table II. The ambient temperature during cycling shall be the applicable maximum temperature (see 3.1). Each cycle
shall consist of a 30-second surge-voltage application followed by a 5.5 minute discharge period. Voltage application
shall be made through a resistor in series with the capacitor and the voltage source. For capacitors whose nominal
capacitance is below 2,500 uF, the resistor shall have a value of 1,000 100 ohms. For capacitors whose nominal
capacitance is 2,500 uF and above, the value of the resistor shall be determined from the following formula:
6
2.5 x 10
R=
C
Where:
R = resistance in ohms.
C = capacitance in uF.
Each surge-voltage cycle shall be performed in such a manner that the capacitor is discharged through the applicable
resistor at the end of the 30-second application. After the test, dc leakage, capacitance, and dissipation factor shall
be measured as specified in 4.5.3, 4.5.4, and 4.5.5, respectively. Capacitors shall then be visually examined for
mechanical damage, leakage of the electrolyte, and deformation of the case.
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