4263B
Warning
While
H
CUR
terminal
of
the
4263B
is
connected
to
a terminal
of the
transformer
,
high-voltage
can
be
induced
at
the other
terminals.
For
safe
operation,
when
connecting
or
disconnecting
a
transformer
, connect
the
transformer
leads
in
the
following
order:
Connect
transformer
, rst
to L
POT
,
L
CUR
,
and
H
POT
terminals
,
and
then
connect
the
H
CUR
terminal
last.
Disconnect
the
transformer
from
the
H
CUR
terminal
rst,
and
then
the
H
POT
,
L
POT
,
and
L
CUR
terminals
.
In
Figure
3-11
,
one
side
of
the
transformer
is
connected
to
H
CUR
and
L
CUR
terminals
,
and
the
other
side
to
the
H
POT
and
L
POT
terminals
.
The
L
CUR
and
L
POT
terminals
are
connected
in
common.
Y
ou
can
get
this
conguration
conveniently
when
using
the
16060A
Transformer
T
est
Fixture
.
When
measuring
N,
the
4263B
measures
both
voltages
at
H
CUR
(V1)
and
at
H
POT
(V2),
while
applying
an
A
C
voltage
to
H
CUR
.
F
or
both
voltage
measurements
,
SW1
switches
(in
Figure
3-11
)
to
H
CUR
and
H
POT
.
The
4263B
calculates
N
from
the
ratio
of
these
two
voltages
.
When
measuring
M,
the
4263B
measures
the
voltage
at
H
POT
(V2)
and
the
current
input
to
L
CUR
(I1).
The
4263B
calculates
M
from
the
ratio
of
V2
and
I1.
Note
The
4263B can
only measure
N
1.
So
,
to
measure
N,
connect
the
transformer
side
with the
more turns
to
the
H
CUR
terminal.
Note
The
conguration
shown
in
Figure
3-11
is
a
two-terminal
conguration,
while
the
4263B
's
normal
measurement
conguration
is
a
four-terminal
pair
(for
details
,
refer
to
\F
our-T
erminal
P
air
Conguration
"
in
Chapter
7).
Note
The
4263B
's
correction
function
is
designed
for four-terminal
pair
congurations
.F
or
transformer
measurements
,
which
uses
a
two-terminal
conguration,
the SHORT
correction does
not
work
eectively
.
In
place
of
the
SHORT
correction, you
can use
the
deviation
measurement
to
cancel
the
test
leads
residual impedance
.
The
eective
measurement
error
correction
methods
selection
are
as
follows:
Parameter OPEN Correction SHORT Correction
(Deviation
Measurement
1
)
LOAD
Correction
L2 eective not
so eective
(more eective)
eective
R2 eective not so eective
(more eective)
not eective
M eective eective | eective
N not eective not eective | not eective
1
Take SHORT measurement data as the reference value of the deviation measurement
and display
the deviation.
For an example
using the deviation measurement, refer to \Measuring
Transformers" in Chapter 6.
Function Reference and Technical Information 3-31