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*TB 9-6625-2232-35
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
DIGITAL VOLTMETER
HEWLETT-PACKARD, MODEL 3456A
Headquarters, Department of the Army, Washington, DC
15 November 2002
Approved for public release; distribution is unlimited
REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS
You can 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, 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]. Instructions for sending an electronic 2028
may be found at the back of this manual. For the World Wide Web, use:
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 3
Accessories required....................................... 5 3
III. CALIBRATION PROCESS
Preliminary instructions................................. 6 4
Equipment setup ............................................ 7 4
Dc voltage ...................................................... 8 5
Resistance ...................................................... 9 6
Ac voltage....................................................... 10 8
Final procedure .............................................. 11 9
____________
*This bulletin supersedes TB 9-6625-2232-50, dated 26 March 1993.
TB 9-6625-2232-35
SECTION I
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin provides instructions for the
calibration of Digital Voltmeter, Hewlett-Packard, Model 3456A. The manufacturer's
manual was used as the prime data source 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
parameters Performance specifications
Dc voltage Range: 0 to 1000 V (in 5 ranges)
Accuracy: