Operating instructions

PERFORMANCE
CHECK AND
ADJUSTMENT
This section contains information
necessary to perform a complete instrument
performance check and adjustment
. Limits
given in the procedure are adjustment
guides and should not be interpreted as
performance requirements unless
preceded by a
check mark (-,/) . Where possible, instrument
performance is checked before an
adjustment is made .
PRELIMINARY
INFORMATION
Adjustment Interval
To maintain instrument accuracy,
check the performance
of the 71380

every 1000 hours of
operation, or every 6
months if used infrequently . Before
complete adjustment,
thoroughly clean and inspect this
instrument as outlined in
Section 4, Maintenance .
Tektronix Field Service
Tektronix Field Service Centers and the
Factory Service
Center provide instrument repair
and adjustment services .
Contact your Tektronix Field
Office or representative for
further information
.
Using This Procedure
This Performance Check and Adjustment
procedure can be
used either
for complete adjustment or as a check of
instru-
ment
performance . Completion of each step in the proce-
dure
ensures that the instrument is correctly adjusted
and
operating
within specified limits . Refer to
the following
discussion for instructions on a complete or
partial check
and adjustment .
INDEX . An index precedes the procedure to aid in
locating
Performance Check and Adjustment steps .
PERFORMANCE CHECK .
Instrument performance can be
checked by performing
the complete Performance Check
and Adjustment
procedure and omitting only the ADJUST
parts of the steps . A
check mark (-,/) preceding a CHECK
indicates that the
limit given is a performance requirement
specified in Section 2, Specification .
ADJUSTMENT
. Completion of each step in the
Perform-
ance
Check and Adjustment procedure ensures that
the
instrument is correctly adjusted and performing
within
specified limits . Where possible, instrument
performance is
checked before an adjustment is made .
For
best
overall per-
formance when performing the complete adjustment
pro-
cedure,
make each adjustment to the exact setting
indicated .
Section
5-71380
PARTIAL PROCEDURES . The following
procedure is
written to completely check and adjust the instrument to
the Performance Requirements listed in Section 2, Specifi-
cation . If the applications for which the instrument is
used
do not require the full available performance, the procedures
and the required equipment list can be shortened
accordingly .
A partial performance check
and adjustment may be desir-
able after
replacing components, or fo'touch up the adjust-
ment of a portion of the instrument . To check or adjust
only part of the instrument, refer to the Equipment Re-
quired list which precedes that portion of the procedure to
be performed . To avoid unnecessary adjustment
of other
parts, adjust only if the tolerance
given in each CHECK is
not met .
TEST EQUIPMENT REQUIRED
The test equipment listed in Table 5-1 is required
for a
complete performance check and adjustment of this
instru-
ment . The specifications given in Table 5-1 for test equip-
ment are the minimum required to meet the Performance
Requirements listed in Section 2, Specification . Detailed
operating instructions for test equipment are omitted in
this procedure . Refer to the test equipment
instruction
manual if more information is needed .
Special
Fixtures
Special fixtures are used only where they facilitate instru-
ment adjustment . These fixtures are available from Tek-
tronix, Inc . Order by part number from Tektronix Field
Offices or representatives .
Test Equipment Alternatives
The test equipment listed in
the Examples of Applicable
Test Equipment column, Table 5-1, is required to check
and adjust this instrument . The Performance Check andAd-
justment procedure is based on the first item of
equipment
given as an example . If other equipment is
substituted, con-
trol settings or
setups
may
need to be altered . If the exact
item
of
equipment given as an example is not available,
refer to the Minimum Specifications column to determine if
other equipment may be substituted . Then check the
Purpose column . If you determine that your measurement
requirements will not be affected, the item and correspond-
ing step(s) can be deleted .