Fluke 289 Manuel d'utilisateur télécharger pdf (Page 45)

True-rms Digital Multimeters

Making Measurements

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 (μF) 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.

Save Setup

Auto Range

100 uF

26.52

8:10pm

06/13/07

est15.eps

Figure 19. Capacitance Measurement

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Fluke 289 Manuel d'utilisateur Page 45