BK Precision 2160A Instruction Manual page 20

OPERATING INSTRUCTIONS
100
90
10
0
0.33 F Capacitor
100
90
10
0
4.7 F Capacitor
100
90
10
0
300 F Capacitor
Fig. 7. Typical Capacitive Signatures.
Inductors
Like capacitance, a purely inductive impedance produces
a signature that is an ellipse or circle and value is determined
by the size and shape of the ellipse. A very high inductance
causes the ellipse to flatten out horizontally and a very low
inductance causes the ellipse to flatten out vertically. Values
from about 0.05 H to about 5 H are within measurement
range. Values below 0.05 H will be hard to distinguish from
a short circuit and values above 5 H will be hard to distin-
guish from an open. Fig. 8 shows several typical inductance
signatures.
To test an inductor, insert one of the inductor's leads into
the white COMP TEST jack, and the other into the GND
jack (make sure that the leads touch the metal walls inside
the jacks). To test in-circuit or to test an inductor with leads
that are too short to be inserted into the COMP TEST and
GND jacks, a pair of test leads can be used to connect the
COMP TEST and GND jacks to the component(s).
100
90
10
0
100
90
10
0
Fig. 8. Typical Inductive Signatures.
18
1 Henry Inductor
5 Henry Inductor