34410A/11A/L4411A User’s Guide 113
Measurement Tutorial 4
Capacitance Measurements
The multimeter implements capacitance measurements by applying a known
current to the capacitor as shown below:
An Illustration of the response curve while charging is shown below:
Capacitance is calculated by measuring the change in voltage (DV) that occurs
over a “short aperture” time, (Dt). This measurement is repeated at two
different times during the exponential rise that occurs. An algorithm takes the
data from these four points, and by linearizing that exponential rise over these
“short apertures”, accurately calculates the capacitance value.
UG_ED5.book Page 113 Thursday, March 1, 2012 11:28 AM
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