3B SCIENTIFIC PHYSICS 1017781 Manual De Instrucciones página 7

Fig. 1 Measurement on an external resistor-capacitor
pair
6.4 Measurement of charging time

Set the function switch to CHARGE – STOP.

Set the reference level selector to the re-
quired voltage.

Briefly press the the RESET button to reset
the digital counter to zero.

Set the function switch to CHARGE – START,
to start charging and measurement of time.

Make a note of the time measured as soon as
the counter stops.
6.5 Measurement of discharging time

Follow a similar procedure as for the charg-
ing curve, except that the function switch
should be set to DISCHARGE – STOP and
then DISCHARGE – START.
7. Experiments
7.1 Plotting of charging curve

Set the voltage level selector to 0.5 V and
determine the charging time as specified
under 6.4.

To measure the time for the next value, turn
the selector switch up to the next level and
repeat each step of the procedure.
U / V
10
8
6
4
2
0
0 10 20
Fig. 2 Charging curve for built-in RC pair no. 3
7.2 Plotting of discharging curve

Set the voltage level selector to 9.5 V and
determine the discharging time as specified
under 6.5.

To measure the time for the next value, turn
the selector switch down to the next level
and repeat each step of the procedure.
U / V
10
8
6
4
2
0
0 10 20
Fig. 3 Discharging curve for built-in RC pair no. 3
3
30 40 50 60
t / s
30 40 50 60
t / s
70
70