Measuring capacitance, 35 measuring capacitance, True-rms digital multimeters making measurements – Fluke 289 User Manual

Page 45: Figure 19. capacitance measurement

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True-rms Digital Multimeters

Making Measurements

35

Measuring Capacitance

W

Caution

To avoid possible damage to the meter or to the
equipment under test, disconnect circuit power
and discharge all high-voltage capacitors before
measuring capacitance. Use the dc voltage
function to confirm that the capacitor is
discharged.

Capacitance is the ability of a component to store an electrical
charge. The unit of capacitance is the farad (F). Most capacitors
are in the nanofarad (nF) to microfarad (

μ

F) range.

The Meter measures capacitance by charging the capacitor with
a known current for a known period of time, measuring the
resulting voltage, and then calculating the capacitance.

Menu

Save

Setup

Auto Range

100 uF

26.52

8:10pm

06/13/07

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est15.eps

Figure 19. Capacitance Measurement

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