Model 3455A
Section IV
SECTION IV
PERFORMANCE TESTS
4-1. INTMOUCTIOII.
4-2. This section contains performance and
operational
verification test procedures
which
can be used to
verify
that the 345SA meets its published
specifications (listed
in Table M). All tests
can
be
performed without access
to the interior of the instrument. The
performance tests
in this section do not test the
345SA Math Functions or
HP-IB
Interface. These functions can be tested using
the operators test procedures included in
Section III.
4-3. EQUIPMENT
REQUIRED.
4-4.
The test equipment required for the
performance
tests is
listed at the beginning of each procedure
and
in
the Recommended Test Equipment Table in
Section
I.
If the recommended equipment is
not available, use
substitute equipment
that meets the critical specifica-
tions given in the table.
4-S. PERFORMANCE TEST CARD.
4-6.
Performance Test Cards are
provided
at
the end of
this seaion for your
convenience
in
recording the per-
formance of the 34S5A
during
either test.
These cards
can be
removed from
the
manual and used as a perma-
nent record of the incoming inspection or of a
routine
performance test. The Test Cards may be
reproduced
without written permission from Hewlett-Packard.
4-7. CALIBRATIDN CYCLE.
4-8.
The 3455A
requires periodic verification of perfor-
mance. The performance should be tested as
part of the
incoming inspection and at 90-day or
6-month intervals,
depending on the
environmental conditions and your
specific
accuracy requirements.
Two
tests (performance
and opertional verification) are
provided
in this
section.
The operational
verification
test should be performed as
an incoming inspection of the instrument.
The complete
performance test can be used at the 90-day or
6-month
intervals, and
following
a complete calibration
of the in-
strument.
4-9. INPUT TERMINALS/CONTROL SEHINQS.
4-10.
Unless
otherwise
specified,
the
test
signals for the
performance tests can be applied to
either
the
front or
rear INPUT terminals.
All
tests
must
be
performed in
the INTERNAL Trigger Mode
with AUTO CAL on and
MATH off. For
standard instruments (rms converter)
the
rear panel AC
-
AC/DC
switch
must be in the
ac
position. Other control settings
are included in the test
procedures.
4-11.
PERFORMANCE TEST FAILURE.
4-12.
If the
3453A
fails any
of
the performance tests or
operational verification test, perform the adjustments
outlined in
Section V.
If
the problem cannot
be cor-
rected by
the
adjustment, refer to Section
VIII
for
troubleshooting information.
4 13. SPECIFICATION BREAKDOWN.
4-14.
The dc,
ac
and ohms accuracy specifications
(Table 1-1) are grouped according to the selected instru-
ment function, i.e.. High Resolution On or Off, ACV
or Fast
ACV
and
2-Wire
or
4-Wire
ohms.
Within
each
group there are three sets of specifications:
a. 24 hour (23*C ± PC)
b. 90 day (23°C ± 5®C)
c. 6
months
(23*C ±
5*Q
4-15.
The time period
over
which a set of specifications
applies is
relative
to the
time the instrument is initially
adjusted
at the factory
or
is properly readjusted accor-
ding to the procedures outlined in Section V. Before
proceeding
with the
dc, ac
and
ohms accuracy tests, it
will be necessary to determine which set of specifica-
tions applies to your instrument. If the instrument has
just been
received and is
to
be tested as part of the in-
coming inspection, test
for
the 90-day specifications.
If
the
instrument
has
been readjusted within
a period of
24
hours,
test
for the 24-hour specifications. Test limits for
the
24-hour and 90-day specifications are included in the
tables for the accuracy tests. Test limits for the 6-month
specifications must be
derived
from the
specifications
listed in Table
1-1.
If the instrument is operated outside
for the temperature range for a
given
set of specifica-
tions, the
appropriate temperature coefficients, listed
in
Table 1-1, must be added to those specifications. The
test limits
given
in the tables for the dc, ac and ohms ac-
curacy tests do not include
temperature
coefficients.
4-16.
Each set of specifications includes an accuracy
specification for each
voltage
or ohms range. Accuracy
is specified as a
percentage
of
reading plus an add-on of
one
or more digits (counts). For example, the 24-hour
DC
Accuracy specification for the 1-volt range (High
Resolution
OfO
is:
±
(0.0031^0
of reading + 1 digits)
At full scale
(1
V)
the least significant display digit,
equal to 10
microvolt,
is O.OOI^o of
reading.
The full-
scale accuracy is therefore:
4-1
To Next Page
Loading...
