HP 3400A Service Manual

SECTION V
MAINTENANCE
5-1. INTRODUCTION
5-2.
This
section
contains
the
information
necessary
for
maintenance
of
the
Model
3400A
RMS
Voltmeter.
Included
are
performance
checks,
adjustment
and
calibration
procedures,
and
troubleshooting
procedures.
5-3. TEST EQUIPMENT
5-4.
The
test
equipment
required
for
the
maintenance
of
the
Model 3400A
is
listed
in
Table
5-1.
If
the
recommended
model
is
not
available,
use
any
‘substitute
that
meets
the
required
characteristics.
‘5-5, PERFORMANCE CHECKS
5-6.
The
Performance
Checks
are
in-cabinet
tests
that
compare
the
Model
3400A
with
its
given
specifications.
These
checks
may
be
used
for
incoming
inspection,
periodic
maintenance,
and
for
specification
checks
after
a
repair.
A
Performance
Check
Test
Card
is
provided
at
the
end
of
this
section
for
recording
the
performance
of
the
instrument
during
the
Performance
Checks.
The
card
may
be
removed
from
the
manual
and
used
asa
perma-
nent
record
of
the
incoming
inspection
or
of
a
routine
performance
check.
If
the
instrument
fails
to
meet
any
of
its
specifications,
perform
the
Adjustment
and
Calibration
Procedures
outlined
in
Paragraph
5-15.
NOTE
Allow
a
30-minute
warmup
period
before
making
performance
checks.
During
the
performance
checks,
periodically
vary
the
Model
3400A
line
voltage
+
10%
with
a
power
line
transformer
to
assure
that
the
instrument
operates
correctly
at
various
ac
line
voltages.
5-7.
Accuracy,
Linearity,
And
DC
Output
Check
5-8.
The
accuracy,
linearity,
and
dc
output
test
set-up
is
illustrated
in
Figure
5-1.
A
Meter
Calibrator
Fluke
Model
760A
and
a
Digital
Multimeter
-hp-
Model
3468A/B
are
required
for
this
test.
a. Connect test setup illustrated in Figure 5-1.
b.
Set
Model
3400A
RANGE
switch
to
0.001
position.
c.
Adjust
the
Meter
Calibrator
for
a
0.001V
400Hz
ac
volts
output;
set
the
Digital
Multimeter
to
measure
1V
dc.
5-1

HP 3400A Specifications

General

Brand	HP
Model	3400A
Category	Measuring Instruments
Language	English