Performance Check/Calibration; Preliminary Information; Test Equipment Required - Tektronix DD 501 Instruction Manual

Section
5
—
DD
501
PERFORMANCE
CHECK/CALIBRATION
PRELIMINARY INFORMATION
Calibration
Interval
To
ensure
instrument accuracy, check the calibration
of the
DD
501 every 1000 hours
of
operation, or every 6
months
if
used
infrequently.
Before complete
calibration,
thoroughly clean
and
inspect
this
instrument as outlined
in
the
Maintenance
section of
the
TM
500-Series
Power
Module manual.
Tektronix Field Service
Tektronix,
Inc.
provides
complete
instrument repair
and
recalibration at local Field
Service
Centers
and
the
Factory Service Center.
Contact your
local
Tektronix
Field
Office or representative
for
further information.
Using This Procedure
Index.
To
aid
in
locating
a step
in
the procedure, an
index
is
given preceding the
Performance Check/Calibra-
tion
procedure.
Calibration.
Completion
of
each
step of
the Perfor-
mance
Check/Calibration
procedure ensures
that
the
instrument
is
correctly adjusted
and
performing within
all
given tolerances.
Where
possible,
instrument perfor-
mance
is
checked
before
an adjustment
is
made.
For best
overall
performance
when
performing a
complete
calibra-
tion,
make each adjustmenttotheexact
setting,
even
ifthe
CFIECK—
is in
tolerance.
Performance Check.
The
performance
of this instru-
ment can be checked without removing the covers or
making
internal
adjustments by
omitting the
first
four
steps of
the procedure.
Test
Equipment Required
The
test
equipment and
accessories listed
in
Table
5-1
or equivalent, are required for
complete calibration of the
DD
501. Specifications given
for
the
equipment
are the
minimum
necessary
for
accurate calibration. Therefore,
the
equipment used must meet
or
exceed
the
listed
specifications. Detailed operating instructions for the
test
equipment
are not given
in this
procedure. Refer
to
the
appropriate instruction
manual
if
more
information
is
needed.
If
only a
Performance
Check
is
to
be performed, not
all
of the
listed test
equipment
is
required.
Items used only
for
calibration are indicated
by footnote
1.
The
remaining
pieces
of
equipment
are
common
to
both procedures.
Special Calibration Fixtures.
Special Tektronix calibra-
tion fixtures are
used only
where
they
facilitate
instrument
calibration.
These
special calibration fixtures are available
from
Tektronix,
Inc.
Order by
part
number through your
local
Tektronix
Field
Office or representative.
Calibration
Equipment
Alternatives.
All
of
the
listed test
equipment
is
required to
completely
check and
calibrate
this
instrument.
However, complete checking
or calibra-
tion
may
not always be necessary or desirable.
The
user
may
be
satisfied
with
checking
only selected character-
istics,
thereby reducing
the
amount
of
test
equipment
actually required.
The
Performance Check/Calibration procedure
is
bas-
ed on
the
first
item of
equipment given as an example.
When
other
equipment
is
substituted, control settings or
calibration
setup might need
to
be
altered. Ifthe
exact item
of
equipment
given as an
example
in
the Test
Equipment
Required
table
is
not available,
first
check
the
Specifications
column
carefully to
see
if
any other equip-
ment
might
suffice.
Then
check
the
Usage column
to
see
what
this
item
is
used
for.
If
usedforacheckoradjustment
that
is
of
little
or
no importance
to
your measurement
requirements, the item
and corresponding
step(s)
can be
deleted.
REV.
A,
NOV
1975
5-1