Appendix
A-2230
Operators
APPENDIX A
PERFORMANCE CHECK PROCEDURE
INTRODUCTION
PURPOSE
The "Performance Check Procedure"
is
used to verify
the instrument's Performance Requirements statements
listed
in
Table
1-1
and
to determine the
need
for calibra-
tion. The performance checks may also
be
used
as
an
acceptance test or
as
a preliminary troubleshooting
aid.
PERFORMANCE CHECK INTERVAL
To ensure instrument accuracy, check its performance
after every 2000 hours of operation or once each year, if
used infrequently. A more frequent interval may
be
neces-
sary if the instrument
is
subjected to harsh environments
- - or severe usage.
STRUCTURE
The "Performance Check Procedure"
is
structured
in
subsections to permit checking individual sections of the
instrument whenever a complete Performance Check
is
not required. At the beginning of each subsection there
is
an
equipment-required list showing only the test equip-
ment necessary for performing the steps
in
that subsec-
tion.
In
this list, the Item number that follows each piece of
equipment corresponds to the Item number listed
in
Table A-1.
Also at the beginning of each subsection
is
a list of
all
the front-panel control settings required to prepare the
instrument for performing Step 1
in
that subsection.
Each
succeeding step within a particular subsection should then
be
performed, both
in
the sequence presented
and
in
its
entirety, to ensure that control-setting changes will
be
correct for ensuing steps.
TEST
EQUIPMENT REQUIRED
The test equipment listed
in
Table
A-1
is
a complete list
of the equipment required to accomplish the "Performance
Check Procedure". Test equipment specifications
described
in
Table
A-1
are the minimum necessary to pro-
vide accurate results. Therefore, equipment used must
meet or exceed the listed specifications. Detailed operating
instructions for test equipment are not given
in
this pro-
cedure. If more operating information
is
required, refer to
the appropriate test equipment instruction manual.
When equipment other than that recommended
is
used,
control settings of the test setup may
need
to
be
altered.
If the exact item of equipment given
as
an
example
in
Table
A-1
is
not available, check the "Minimum
Specification" column to determine if any other available
test equipment might suffice to perform the check.
LIMITS AND TOLERANCES
The tolerances given
in
this procedure are valid for
an
instrument that
is
operating
in
and
has
been
previously
calibrated
in
an
ambient temperature between
+20°c
and
+30°C.
The instrument also must have
had
at least a 20-
minute warm-up period. Refer to Table
1-1
for tolerances
applicable to
an
instrument that
is
operating outside this
temperature
range.
All
tolerances specified are for the
instrument only
and
do not include test-equipment error.
PREPARATION FOR CHECKS
It
is
not necessary to remove the instrument cover to
accomplish any subsection
in
the "Performance Check
Procedure," since
all
checks are made using operator-
accessible front-
and
rear-panel controls
and
connectors.
The most accurate display adjustments are made with
a stable, well-focused, low-intensity display. Unless other-
wise noted, adjust the A
and
B INTENSITY,
STORAGE/READOUT INTENSITY, FOCUS,
and
TRIGGER LEVEL controls
as
needed to view the display.
A-1
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