Calibration; Performance Check; Test Equipment Required - Tektronix 7A19 Instruction Manual

Introduction
To assure instrument accuracy, check the calibration of
the 7A19 every 1000 hours of operation or every six
months if used infrequently . Before complete calibration,
thoroughly clean and inspect this instrument as outlined in
the Maintenance section .
TEKTRONIX Field Service
Tektronix, Inc., provides complete instrument repair and
recalibration service at local Field Service Centers and the
Factory Service Center . Contact your local field office or
representative for further information .
Performance Check
The performance of this instrument can be checked by
performing only the \/ CHECK steps . Performing the steps
marked with a \/ indicates that the instrument is checked
against the tolerances listed as a Performance Requirement
(see Specification section) .
Limits and tolerances given in other check steps are
calibration guides and should not be interpreted as instru-
ment specifications . Operator front-panel adjustments are
adjusted as part of the Performance Check procedure .
Calibration
To verify proper calibration of the 7A19 and to prevent
unnecessary re-calibration of the entire instrument, perform
the Adjust- portion of a step only if the tolerance given in
the Check- part of the step is not met.
For best overall instrument performance when per-
forming a complete calibration procedure, make each
adjustment to the exact setting even if the Check- is within
allowable tolerance .
General
TEST EQUIPMENT REQUIRED
Section 5---7A19
The following test equipment and accessories, or its
equivalent, is required for complete calibration of the
7A19 . Specifications given for the test equipment are the
minimum necessary for accurate calibration . Therefore, the
specifications of any test equipment used must meet or
exceed the listed specifications . All test equipment is
assumed to be correctly calibrated and operating within the
listed specifications . Detailed operating instructions for the
test equipment are not given in this procedure. Refer to the
instruction manual for the test equipment if more infor-
mation is needed .
Special Calibration Fixtures
Special TEKTRONIX calibration fixtures are used in this
procedure 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 adjust this instrument . The Calibration pro-
cedure is based on the first item of equipment given as an
example of applicable equipment. When other equipment is
substituted, control settings or calibration setup may need
to be altered slightly to meet the requirements of the
substitute equipment. If the exact item of test equipment
given as an example in the Test Equipment list is not
available, first check the Specifications column carefully to
see if any other equipment is available which might suffice.
Then check the Usage column to see what this item of test
equipment is used for. If used for a check or adjustment
which is of little or no importance to your measurement
requirements, the item and corresponding step(s) can be
deleted.