DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
VIBREX BALANCE KIT MODEL B4591,
VIBREX TESTER MODELS 11 AND 11A,
BALANCE PHAZOR MODEL 177M-6A,
BLADE TRACKER MODEL 135M-11, AND
BALANCER ANALYZER CHADWICK-
HELMUTH, MODELS 8500C AND 8500C+
Headquarters, Department of the Army, Washington, DC
9 February 2010
Distribution Statement A: 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 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 send in your comments electronically to our E-mail address:
2028@redstone.army.mil or by fax 256-842-6546/DSN 788-6546. For the World Wide Web use:
https://amcom2028.redstone.army.mil. Instructions for sending an electronic 2028 can be found at
the back of this manual.
Paragraph
Page
IDENTIFICATION AND DESCRIPTION
Test instrument identification.............................
Forms, records, and reports .................................
Calibration description ........................................
EQUIPMENT REQUIREMENTS
Equipment required .............................................
Accessories required .............................................
CALIBRATION PROCESS FOR
VIBREX TESTER MODELS 11 AND 11A
Preliminary instructions ......................................
Equipment setup ..................................................
RPM test ...............................................................
Final procedure.....................................................
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*This bulletin supersedes TB 9-4920-455-24, dated 29 May 2008.