MASS MEASUREMENTS
Subcourse Number MM0479
Edition 0
United States Army Missile and Munitions Center and School
Redstone Arsenal, Alabama
5 Credit hours
Edition Date 1990
INTRODUCTION
When you go to the grocery store and buy produce (fresh vegetables and fruit) by the pound,
how do you know that you are getting a full pound? You could watch the clerk weigh the
produce and you can read the scale, but how do you know that the scale is accurate? You can be
reasonably certain that the scales are accurate because they are calibrated at regular intervals
with certified weights by the state. Just as the state must certify scales and weights used in
produce, freighting and highway truck weighing, the Army must check its standards. As a
calibration specialist you will be required to calibrate weights used by the Army. The weights
you calibrate will be used, in turn, to calibrate precision pressure gages and torque measuring
equipment. At the conclusion of this subcourse you will know the three different methods of
mass measurement, the operation procedures for weighing equipment used to make these
measurements, and how to identify the different groups and classes of mass standards.
This subcourse is organized as follows:
Lesson 1. Introduction to Mass Measurements
Lesson 2. Mechanical Balances and Scales
Examination
ACKNOWLEDGEMENT
This subcourse has been adapted for Army use from TB 9-6670-264-50, TB 9-6670-245-50, The
Voland J-5000-D-15 Instruction manual, and the Henry Troemner 175G Balance Instruction
Manual.
Subcourse Philosophy
This subcourse is not intended as instruction in basic physics. The subcourse is technically
written only to the depth necessary to explain the overall operation of the instruments. When the
equipment is covered in other correspondence subcourses, subcourse numbers will be referenced
and only brief narrative will be used.
LESSON 1. INTRODUCTION TO MASS MEASUREMENTS
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