ESI 250-DA - Key Components in DC Parallel Inductance Measurement

2.
3.
4.
3
FOR
PARALJLEL
INDUCTANCE
MEASUREMENTS
WITH
DC
SUPER-
IMPOSED
THROUGH
THE
GENERATOR
TERMINALS
(cont.
)
R
-
POWER
LIMITING
RESISTOR
This
protects
the
bridge,
the
detector
,
and
the
unknown
inductor
.
L
-
ISOLATING
INDUCTOR
Avoid
ac
pickup
and
coupling to
the
unknown.
This
prevents
excessive
generator
loading.
Not
necessary
if
R^lOO
ohms.
C
-
ISOLATING
CAPACITOR
This
keeps
dc out
of the
Generator.
R
-
CURRENT
ADJUSTING
CONTROL
To
set
desired
current,
d
MA
-
CURRENT
MONITORING
METER
To
measure
dc
current.
MEASURE
THE
INDUCTANCE
See
Section
2.3.
{
e
l
sm
250-DA
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