ESI 250-DA - Parallel Inductance Measurement with DC via Generator Terminals

2.
3.
4.
3
FOR
PARALLEL
INDUCTANCE
MEASUREMENT
WITH
DC
SUPERIMPOSED
THROUGH
THE
GENERATOR
TERMINALS
USE
SAME
FREQUENCY
AS
-
DETECTOR
TUNING
NETWORK
UNKNOWN
INDUCTOR
CONNECT
AS
SHOWN
E
-
DC
VOLTAGE
SOURCE
For the ac
supply use an
external
generator or the
special
internal
connection
indicated
in
section 2, 3. 4.
2 B.
A
detector
isolating
capacitor
is
built into
the
Model 2
50
-DA
Bridge
.
*This
limits
to
one
watt
the
dc
power
which can be
supplied
to
the
bridge
thus
protecting
all
of
the
bridge
circuit.
With
care
more current and
voltage
can
be
applied.
The
current
rating
of
the
bridge is given in
the table below. These
values
should
never
be
exceeded.
RANGE
UNKNOWN
INDUCTANCE**
MAXIMUM
CURRENT
0,
1
mh
0 .
1
p,h to 1.2 mh
710 ma
1
mh
1
(ih to
1 Z mh
230
ma
1 0
mh
10 fih
to 120
mh
71 ma
0.
1
h
100
(ih
to
1 . 2
h
23
ma
1
h
1 mh
to 12 h
7
. 1
ma
10 h
1 0
mh to 120
h
2.
3
ma
100
h
100 mh
to
1200 h
250
(ia
**Lower
limit
is one
dial
division
lelsl
i
i
250-DA
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