HP 4262A User Manual

Section
IV
Model
4262A
Calibration
of
DUT’s
——
CALIBRATION
OF
DUT’S
Either
user
built
DUT’s
or
substitution
standards
with
accuracies
which
satisfy
the
requirements
may
be
used
for
performance
testing
and
calibration
of
the
4262A.
The
DUT’s
recommended
for
making
the
tests
and
adjustments
can
be
accuracy
certified
in
accord
with
the
calibration
procedure
detailed
below.
This
calibration
procedure
applies
to
all
alternate
DUT’s
which
do
not
carry
public
or
testing
laboratory
certification.
[CAPACITANCE CALIBRATION]
Measure
the
DUT
or
substitution
standard
capacity
with
a
precision
capacitance
bridge
that
meets
the
calibration
accuracy
and
frequency
requirements.
For
testing
or
calibrating
dissipation
factor
of
DUT,
use
equipment
with
required
dissipation
measuring
capability
and
verify
the
exact
calibration
frequency
to
permit
compen-
sating
D
value
for
the
difference
in
measuring
frequency
between
individual
Model
4262A’s
and
the
calibration
equipment.
If
the
frequency
error
is
less
than
3%,
compensation
is
not
required
for
dissipation
factors
of
0.01
and
below.
[RESISTANCE CALIBRATION]
Use
a
metal
film
resistor
of
appropriate
value
for
each
DUT
to
maintain
a
constant
resistance
over
a
wide
range
of
frequencies.
Measure
the
resistance
with
a
high
accuracy
DMM.
When
measuring
1k
and
below,
use
a
4
terminal
measurement
configuration.
[DISSIPATION FACTOR CALIBRATION]
DUT’s
used
as
D
standards
can
be
built
with
precisely
measured
components.
The
dissipation
factor
of
the
DUT
is
determined
by
an
exact
calculation
from
the
calibrated
values
of
each
components
in
accord
with
the
following
equations:
Circuit Mode Derivation of D
Cp
Tk D - 1/wCpRp
Rp
Cs Rs _
it D = wCsRs
Note
For easier calibration of dissipation, use
accurately calibrated resistors rather than
capacitors.
4-4

HP 4262A Specifications

General

Brand	HP
Model	4262A
Category	Measuring Instruments
Language	English