Datasheet

RND is a trademark of Distrelec
Radial Super Capacitor
Measuring method
a) Setting the direct current voltage of constant current/constant voltage power supply as rated voltage (U
R
)
b) Setting the constant current value of the constant current discharge device , according to Table 2 specified
c) Turn the switch S to the d.c. power supply, and unless otherwise specified in the individual standards, apply voltage and
charge for 30 min after the constant current/ constant voltage power supply has achieved the rated voltage
d) After charging for 30 min has finished, change over the switch S to the constant current discharge device , and discharge
with a constant current
e) Unless otherwise specified in the individual standards, measure the time t1 and t2 where the voltage between capacitor
terminals at the time of discharge reduces from U1 to U2 as shown in Figure 2, and calculate the capacitance value by the
following formula
Figure 2 – Voltage characteristic between capacitor terminals
C is the capacitance (F);
I is the discharge current (A);
U1 is the measurement starting voltage (V);
U2 is the measurement end voltage (V);
t1 is the time from discharge start to reach U1 (s);
t2 is the time from discharge start to reach U2 (s).
Discharge current I and decrease in voltage of discharge voltage U1, U2 , according to table 1