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Section
V
Model
3455A
t.
Set the
AC
Calibrator
frequency
to
40
kHz.
Adjust
C34
(100 V,
40 kHz ADJ)
for
a
3455A
reading
of
100.010
V
(tolerance
= + 20
counts).
u.
Set the
AC
Calibrator for
an output
of
1
V, 100
Hz.
Set the
3455A
RANGE
to
1
V. Repeat Steps
o
through u
until
optimum
adjustment
is
obtained.
Table
S-2.
Jumper Removal (A15
board).
Adiuttment
Remove
1
V,
40 kHr
10
V.
40 kHz
100
V,
40 kHz
Jumper 2
Jumper
3
Jumper
1
5-16.
AVERAGE CONVERTER ADJUSTMENTS
(A13
Assy.,
3455A
Option 001
Only).
5-17.
The
following
adjustments
require
an
AC
Calibrator
such
as
the
-hp-
Model 745A. For
optimum
adjustment
ac-
curacy. the
AC
Calibrator
should
be
calibrated
at
I
V,
10
V
and 100
V
at
100 kHz.
The
AC
Calibrator's
error
measure-
ment
control
should
then
be
used
to
adjust
out
the
100
kHz
errors
indicated
on
the calibration
chart.
For
example,
if
the calibration
chart indicates that the
74SA
output
is
0.04%
high
at
1
V, 100 kHz.
set
the error
mea-
surement
control to
+ 0.04%
to
obtain
a precise
1
V
output.
The
74SA
can be
calibrated
during
a
routine
per-
formance
test
using the
procedures
outlined
in
the
745A
Operating
and
Service
Manual.
5-18.
Adjustment
Procedure.
Equipment
Required:
AC
Calibrator
(-hp-
Model 745A)
a.
Set the
34S5A
controls as
follows:
FUNCTION
ACV
RANGE
IV
AUTO CAL
ON
GUARD
ON
TRIGGER
INT
MATH
OFF
b.
Set the
AC
Calibrator for
an output
of
10
mV,
1
kHz. Connect
the
AC
Calibrator
output
to the
34SSA
INPUT.
c.
Adjust
R12 (DC OFFSET)
for
a
3455A
reading
of
0.01000
V
± 3
counts.
d.
Set the
AC
Calibrator to
1
V, 100
kHz
(use error
measurement
control).
Adjust
R13
(1
V
HI
FREQ)
for a
345SA
reading
of
1
.00000
V
±
5
counts.
e.
Set the
AC
Calibrator
frequency
to
1
kHz
(turn off
error
measurement
control).
Adjust
R36
(1
V
LOW
FREQ)
for a
3455A
reading
of
1
.00000
V
± 5 counts.
f.
Set the
3455A
RANGE
to
10
V. Set the
AC
Calibra-
tor
to
10 V,
1
kHz.
Adjust
R23
(10
V
LOW
FREQ)
for a
34S5A
reading
of 10.0000
V
±
S
counts.
NOTE
If,
in
the following
steps,
there
is
insufficient
adjustment range for
the
10
V
or
100
V
high-
frequency (100
kHz)
adjustment, the
adjust-
ment
range
can be
expanded by removing
the
appropriate
jumper
wire
on
the
AI3
board
(see
Table
5-3).
Refer
to the
AI3
board com-
ponent
locator
(Section
VUIj
for
jumper
locations.
g.
Set the
AC
Calibrator
frequency
to
100 kHz.
Adjust
CIS
(10
V
HI
FREQ)
for
a
3455A
reading of
10,0000
V
±
10
counts.
h.
Set the
3455A
RANGE
to
100
V.
Set the
AC
Cali-
brator
to
100 V.
1
kHz. Adjust
R46
(100
V LOW
FREQ)
for a
3455
A
reading
of
1
00.000
V
±
5
counts.
i.
Set the
AC
Calibrator
frequency
to
100
kHz. Adjust
C34
(100
V
HI
FREQ)
for
a
3455A
reading
of
100.000
V
±
10 counts.
j.
Repeat
Steps d through
i
until
optimum
adjustment
is
obtained.
Table
5-3.
Jumper Removal (A13
board).
Adjuttritent
Remove
10
V.
too
kHz
100
V.
100
kHz
Jumper
2
Jumper
1
5-4
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