Tektronix 2213 - Page 54

PERF O RM A N C E
C
HE
C
KPR
OC E D URE
ι
ι
ι
ι
10
ι
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ι
PURP
OS
E
The "Performance Check Procedure" is used to verify
the
instrument's
P
erformance Requirements as liste d i n
t he
"S p ecification" (Sectio n 1 ) and to d etermine the need
for rea d justment . These
checks may also b e used as an
acceptance test, as α p reliminary
troubleshooting aid, and
as α c heck of the instrument after repair .
Removing the
instrument's cover is not necessary to preform
this p ro-
cedure . All checks are ma d e using the
operator-accessible
fro n t- a n d rear-panel controlsan d con n
ectors .
To ensure instrument accuracy, its p erformance
should
be c h ec k ed after every 2000 h ours of op
eratio
n or
once
each year, if u se d infrequently .
TE
ST
E
Q U
I
P M EN T RE Q U I RE D
The test equi p
ment liste d i n Table 4-1 is α complete
list of the equipment
require d to accomplish both t he
"Performance Check Proce d ure" in t his
section an d t he
"A d justment P roce d ure" in
Section 5 . Test equi
p
ment
specifications d escribe d i n Table 4-1 are the
minimum
necessary to provi d e accurate r esults . Therefore, equipment
used
must meet or exceed the liste d s pecifications . Detailed
operating instructions for
test
e q
ui p ment are not given in
t his p rocedure . If more operating
information is re q uired,
refer to the a p propriate test-e q ui p ment
instruction manual .
When e q
ui
p
ment other than that recommen d e d is use d ,
control settings of the test setup may nee d to b e altered .
If the exact item
of equipment given as an exam p le in
Table 4-1 is
not available, first check t he "Purpose" column
to verify use of this item
. If it is used for α check t hat is
of little or
no
importance
to your measurement r e q uire-
ments, the item and correspon
d
ing
steps may b e deleted .
If the check is important, use the "Minimum Specification"
column carefully to d etermine if any other available test
equipment might suffice .
I N T R
OD U CTIO
N
Section 4-2213 Service
S
pecial fixtures are
u sed only where they simplify the
test setup
and p roce d ure . These fixtures are available from
Tektronix,
Inc . an d can b e or d ere d b y p art number through
your
local
Tektronix
F iel d Office or representative .
L I M ITS A N D
TO
LER A
NC E S
T he tolera n ces give n in t h is pr oce d ure are vali d for an
instr ume nt t h at is o pe r ating i n
a nd h as bee n p r evio u sly
calibrate d in an ambient tem p erature between
+20 ° C and
+30 ° C . The instrument also must h ave had
as least α 20-
minute warm-up p eriod . Refer to the "S p ecification"
(Section 1) for tolerances
a p plicable to an instrument
operating outsi de this temperature
r ange . All tolerances
specifie d are for the instrument
only and do not inclu d e
test-equipment error .
PREP A R ATIO N
Test
equipment
items 1 through 9 in Table 4-1 are
r
eq
uired
to accomplish α com p lete P erformance Check . At
the beginning
of each s ubsection, in both t he "Performance
Check Proce d ure"
and the "Adjust m ent P rocedure"
sections, there is an equipment-require d list showing only
the
test
equipment n
ecessary for p erforming the steps in
that
subsection
.
In this list, the item n umber t hat follows
each
piece
of equipment correspon d s to the item number
listed in Table 4-1 .
This
p
roce d ure is
structured
in
subsections, which can
b
e p erformed i ndependently,
to permit checking individual
portions of the instrument
. At the b eginning of each
s ubsection is α list of all the front-panel
control settings
r eq uired to p re p are the instrument for p
erforming Step 1
in that subsection . E ach succee d ing
step within α p articular
subsection should then b e performed ,
both
i
n t he sequence
p resente
d and in its entirety, to ensure that control-setting
changes will be correct for ensuing steps .