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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
7/59
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