Fluke 87 III - Manual (Page 27)

Making Measurements
19
The meter measures capacitance by charging the
capacitor with a known current for a known period of time,
measuring the resulting voltage, then calculating the
capacitance. The measurement takes about 1 second per
range. The capacitor charge can be up to 1.2 V.
The meter’s capacitance ranges are 5 nF, 0.05
µ
F,
0.5
µ
F, and 5
µ
F.
To measure capacitance, set up the meter as shown in
Figure 5.
The following are some tips for measuring capacitance:
•
To speed up measurements of similar values, press
K
to manually select the proper range.
•
To improve the accuracy of measurements less than
5 nF, use the relative (REL) mode to subtract the
residual capacitance of the meter and leads.
MIN MAX RANGE HOLD H
Hz REL
mA A
mV
V
V
OFF
!
!
A COM V mA µ A
1000V MAX 400mA MAX FUSED 10A MAX FUSED
PEAK MIN MAX
µ A
µ
CAT II
nF
Select
Capacitance
+
+
+
+
+
+
+
+
+
4 1/2 DIGITS 1 Seconds
87 TRUE RMS MULTIMETER III
iy10f.eps
Figure 5. Measuring Capacitance