Tektronix 576 - Section 5 Performance Check;Calibration

S E CTIO N 5
PERF O RM A N C E C
HE
C
K /CA L I BR ATIO N
General
C h ange
information, if any, affecti ng t h is section will befoun dat t h e rear of
t
h e manual
.
T h is
combine
d
performance c h ec k and calibration p roce-
d ure provides
bot h α met h od of com p aring t he instrument to
p erformance requirements given in t he Specification
section
an d α met h od of a d j usting any instrument c
h aracteristics
w
h ic h do not meet t h is s p ecification . Α performance
ch ec k
an d calibration recor d is incl u d ed at t h e beginning of t h
e
p roced
ure
for
use
as α
check list to verify co r rect calibration
an d o p eration of
t he Ty p e 576 or as α gui de for q uic k
calibration
by
an
experience d calibrator .
T h e Ty p e 576 s h oul d be checke d an d recalibrate d afte r
eac h 1000
h ours of operation orat least once every 6 mont h s
to
ensure
t
h
at it
is operating prop erly . In add ition, portions
of t he instrument
will require recalibrationifcom p onentsare
re p lace d or ot
h er elect r ical re p airs are ma d e .
T h
e
ste
p
by
step instructions in t h is p r oce d ure furnis h an
ord erly approac
h to t h e isolation of possible malfu n ctio n s
and t hus
serve as
an
ai d in tro u bles h ooting t he instrument .
Any maintenance t h at is known to be nee d ed s h oul d be
p erforme
d
before starting t he calibration p roce dure . If any
troubles
become a pp arent during calibration, t h ese also
s h oul d be corrected before p rocee d ing . Repair an d servicing
informatio n is given in t he M aintenance section .
E qui p ment R e q uire d
T h
e following (or eq uivalent) items of eq uipment are
re qu i r ed for α com p lete calibration of
t h e Ty p e 576 . T he
eq ui p ment is illustrate d in F ig . 5-1 . If
substit u te eq ui p ment is
used , its accuracy must excee d t
he tolerances to be measure d
by at least 4 times in or d er to ma k
e
an
accurate measu r ement .
If t he tolerance
to be measure d is less t h an 1 °/ ο , t he accuracy
of t h
e
test
e q
ui
p me n t must excee d t he tolerance by at least
10
times .
1 . Test oscillosco p
e,
Te
k t r onix Ty p e 547 with Ty pe W
Differential Com p ara - tor P lug-In U nit . M inim u m alternate
re qu irements : Ban d wi d t h f r omDC to 100 kH
z ;
swee
p
r
ates
f r om 0 .2 ms/cm to 5 μ s/cm ; ve r tical d
eflection factors
from 1 mV /cm to 500 m
V /cm ; accu r acy of voltage
measureme n t wit h in 3°/ ο ; internal
com p arison voltage p ro-
vi de d wit h accuracy of 0 .5% ; AC an d DC
vertical
in
pu t
cou p ling ; internal triggering .
2 . Ty pe 576 Calibration F ixture
(Te
ktronix
P
a r
t
Νο .
067-0599-00) .
3 . V ariable autotransformer (e
.g ., General
Rad io,
V
ariac
Ty pe V J 10 M T3 W ) . Minimum re q ui r ements : Output voltage
Ty p e 576
variable from 90 to 136 volts AC RM S for 11 5-volt operation
or from 180
to 272 volts AC RM S for 230-volt operation ;
output p
ower rating at least 305 watts . If monitor voltmeter
is
not inclu
d e d ,
separate
AC
voltmeter
is re
q
uire d .
4 .
DC
voltmeter (e .g ., F l uk e M od el
801B d
ifferential
voltmeter or suitable d
igital voltmeter) . M inimum
re
q uire-
ments : V oltage
range
from 0 volts to 250 volts
;
basic accura-
cy with in 0 .6% ο ; accuracy with in 0 .05% at -75 volts .
5 . DCV oltmeter- H ig h V oltage (e .g ., Tri p lett M o d el 630
NA) . Re q uirements : M easure -5000 volts, accuracy wit
h
in
3°/ ο .
6 . 1 Χ test probe, Te k tronix P601 1, wit h BN C connec-
to
r
s . Te ktronix P art Νο . 010-0193-00 .
7 . 42 inc h coaxial cable . C h aracteristic im pe d ance ap-
proximately 93 Ω ; BN C con n ecto rs . Te ktronix P art Νο .
012-0075-01 .
8 . 4 inc h p atc h cord . Standar d banana p lugs at each end .
9 . P lastic sc r ew d river type ad j ustment tool . Te k tronix
P art Νο . 003-0000-00 .
10 . Small screwdriver .
PERF
O
RM A N C E
C
HE
C
K
/CA
L I
BR
ATIO
N
RE
CO
R DA N D I ND E
X
T h e following abri d ged p erformance c heck
an d calibra-
tion procedure has been provi de d for use
as α
recor
d of
p erformance ch ec k an d/or calibration or as α guide for an
experience d calibrator . It may also serve as an in d ex to locate
α p articular ste p in t he p roce d ure .
Ty pe 576, Se r ial Νο .
P erformance C heck/Calibration Date
C hec k ed /Cali b rate d by
P
O
WER S UPPL Y
1 . A d j ust -75- V olt Su pp ly

P age 5-5
A d j ust R721 for -75
volts - 10 .375
volts .
2 . C heck Ot her P ower S upp ly V oltages

P
age 5-5
See com p lete proced
ure for S p ecifica-
tions .