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*TB 9-6625-2020-35
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
DIGITAL MULTIMETER, TEKTRONIX
TYPES DM 502 AND DM 502A
Headquarters Department of the Army, Washington, D.C.
25 July 2002
Approved for public release; distribution is unlimited
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this manual. If you find any mistakes or if you know of a way to
improve these procedures, please let us know. Mail your letter or DA Form 2028
(Recommended Changes to Publications and Blank Forms) directly to: Commander, U.S.
Army Aviation and Missile Command, ATTN: AMSAM-MMC-MA-NP, Redstone Arsenal,
AL 35898-5000. A reply will be furnished to you. You may also provide DA Form 2028
information to AMCOM via e-mail, fax, or the World Wide Web. Our fax number is: DSN
788-6546 or Commercial 256-842-6546. Our e-mail address is: [email protected].
You may also complete a digital DA Form 2028 appearing at:
https://amcom2028.redstone.army.mil.

Paragraph Page
SECTION I. IDENTIFICATION AND DESCRIPTION
Test instrument identification .................................. 1 2
Forms, records, and reports ...................................... 2 2
Calibration description .............................................. 3 2
II. EQUIPMENT REQUIREMENTS
Equipment required .................................................. 4 4
Accessories required ................................................. 5 4
III. CALIBRATION PROCESS FOR TYPE DM 502
Preliminary instructions ........................................... 6 4
Equipment Setup ...................................................... 7 5
Dc volts ..................................................................... 8 5
Ohms ........................................................................ 9 6
Dc current................................................................. 10 7
Ac volts ..................................................................... 11 7
Ac decibels................................................................. 12 8
Final procedure ......................................................... 13 9
IV. CALIBRATION PROCESS FOR TYPE DM 502A
Preliminary instruction ............................................. 14 10
Equipment setup ....................................................... 15 10



__________
*This bulletin supersedes TB 9 6625-2020-35, 24 July 1989.
TB 9-6625-2020-35

Paragraph Page
Dc volts ..................................................................... 16 10
Ohms ........................................................................ 17 12
Dc current................................................................. 18 13
Ac volts ..................................................................... 19 13
Ac decibels................................................................. 20 14
Power supply............................................................. 21 15
Final procedure ......................................................... 22 16


SECTION I
IDENTIFICATION AND DESCRIPTION

1. Test Instrument Identification. This bulletin provides instructions for the
calibration of Digital Multimeter, Tektronix, Types DM 502 and DM 502A. The
manufacturer's manuals were used as the prime data sources in compiling these
instructions. The equipment being calibrated will be referred to as the TI (test
instrument) throughout this bulletin.

a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 2
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports

a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.

Table 1. Calibration Description
Test instrument Performance
parameters specifications
Type DM 502
Dc volts Range: 0 to 1000 V in 5 ranges
Accuracy: