Fluke 287 Fluke 287 and 289 Multimeter Users Manual - Page 45

Measuring Capacitance, Capacitance Measurement

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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. True-rms Digital Multimeters Making Measurements 8:10pm 06/13/07 26.52 Auto Range 100 uF Menu Save Setup + est15.eps Figure 19. Capacitance Measurement 35

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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
+
+
+
+
+
+
+
+
+
est15.eps
Figure 19. Capacitance Measurement