Calibration; Preliminary Information; Calibration Interval; Tektronix Field Service - Tektronix 213 DMM Instruction Manual

Section 6-213 Service
CALIBRATION
PRELIMINARY INFORMATION
Calibration Interval
To assure instrument accuracy, check the calibration of the
213 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 Mainte-
nance section.
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
This section provides several features to facilitate calibra-
tion of the 213. These are:
INDEX. An index is given preceding the Calibration pro-
cedure to aid in locating steps.
CONTROL SETTINGS. Control settings precede each ma-
jor function to be calibrated. Titles for external controls
are fully capitalized in the procedure (e.g. INTENSITY)
and internal adjustments are initial capitalized only (e.g.
Ohms Cal).
COMPLETE CALIBRATION PROCEDURE. Completion
of each step in the complete Calibration procedure ensures
that this instrument is correctly adjusted and performing
within all given tolerances.
PAR"!l_t\L CALIBRATION. A partial calibration is often
desirable after replacing components, or to touch up the
adjustment of a portion of the instrument between majo r
recalibrations. To calibrate only part of the instrumen t ,
set the controls as given under Control settings at the be -
ginning of the major inst rument section for that particular
portion. To prevent unnecessary recalibration of other
parts of the instrument, readjust only if the tolerance given
in the CH ECK- part of the step is not met.
REV. B, MAR. 1976
EQUIPMENT REQUIRED
The test equipment and accessories given in Table 6 -1, or
its equivalent, are required for complete calibration of the
213. Specifications given for the test equipment are the
minimum necessary for adequate 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
information is needed.
Special Calibration Fixtures
Special Tektronix calibration fixtures are used in this pro-
cedure only where they facilitate instrument calibration.
These special calibration fixtures are available from Tek-
tronix, Inc. Order by part number through your Tektro-
nix Field Office or representative.
Calibration Equipment Alternatives
All of the listed test equipment, or its equivalent, is requir-
ed to completely check and adjust this instrument. The
Calibration procedure is based on the first item of equip-
ment given as an example in the Equipment Required list.
If the exact item is not available, first check the Specifi-
cations column carefully to see if any other equipment is
available which might suffice. Then check the Purpose
column to see what this item of test equipment is used for.
If used for a check or adjustment that is of little or no
importance to your measurement requirements, the item
and corresponding step(s) can be deleted.
Complete checking or calibration may not always be nece-
ssary or desirable. The user may be satisfied with checking
only selected characteristics, thereby reducing the amount
of test equipment actually required . The equipment re-
quired for the actual calibration adjustments in the pro-
cedure are identified in Table 6-1 with a footnote ( 1).
6-1