ACCP Subcourse No. MM0479
LESSON OBJECTIVE
MASS MEASUREMENTS
Upon completion of this
lesson you should be able to:
1. State the fundamental
theories of mass and mass
measurements.
2. Explain the difference
in the construction of mass
weights.
3. Define the different
classification of mass
weight.
4. Explain the operational
principles of any balance.
5. Answer all lesson
exercise questions
correctly.
CREDIT HOURS
Two hours
TEXT
1. General. This lesson is designed to help you increase your knowledge of the area of mass and
mass measurement. A review of mass measurement principles is combined with construction and
operation principles to help you become more proficient at your job. This lesson teaches the
fundamental theories of mass and measurements, operational principles of balances, and the
construction and classification of associated weights.
2. Principles of Mass.
a. Definition of mass - a quantity of matter forming a body of indefinite shape and size.
b. Mass remains constant regardless of the location.
c. Weight changes with location due to the effects of gravity.
d. Weights must be stable at operating temperature - 1 lb or less requires 4 hours and over 1
lb requires 12 hours.
3. History of Mass Measurement
a. Before we discuss the present day methods and equipment used for mass measurement let's go
back into history and see where and how our standards have been developed. The oldest known
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