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|Discipline and Nbr:
|Units||Course Hours per Week|| ||Nbr of Weeks||Course Hours Total
|Maximum||3.00||Lecture Scheduled||2.00||17.5 max.||Lecture Scheduled||35.00
|Minimum||3.00||Lab Scheduled||2.00||17 min.||Lab Scheduled||35.00
| ||Contact DHR||1.00|| ||Contact DHR||17.50
| ||Contact Total||5.00|| ||Contact Total||87.50
| ||Non-contact DHR||0|| ||Non-contact DHR Total||0
Title 5 Category:
AA Degree Applicable
00 - Two Repeats if Grade was D, F, NC, or NP
Also Listed As:
| ||Total Out of Class Hours: 70.00||Total Student Learning Hours: 157.50||
Metrology is the study of the science of precision weights, measurement, and inspection used in manufacturing. Students will become familiar with a ll types of handheld electronic and optical measuring devices. Visits to local industries utilizing CMM (Coordinate Measuring Machines) and related inspection devices are included. Print reading will be used as a vehicle to support GD&T (Geometric Dimensioning & Tolerancing) inspection standards. Class also includes study of ISO (International Standards Organ ization), SPC (Statistical Process Control), and ASME (American Society of Mechanical Engineers) inspection standards.
Completion of or concurrent enrollment in MACH 51A and MACH 80A and in IED 90A OR APTECH 90A.
Limits on Enrollment:
Schedule of Classes Information
Students will become familiar with all types of handheld measuring devices, electronic and optical. Visits to local industries utilizing CMM (Coordinate Measuring Machines) and related inspection devices are included.
Prerequisites:Completion of or concurrent enrollment in MACH 51A and MACH 80A and in IED 90A OR APTECH 90A.
Limits on Enrollment:
Repeatability:00 - Two Repeats if Grade was D, F, NC, or NP
ARTICULATION, MAJOR, and CERTIFICATION INFORMATION
Certificate Applicable Course
Outcomes and Objectives:
Upon completion of the course, students will be able to:
|CSU GE:||Transfer Area|| ||Effective:||Inactive:
|IGETC:||Transfer Area|| ||Effective:||Inactive:
|CSU Transfer:||Transferable||Effective:||Fall 2000||Inactive:||Summer 2012
Upon completion of this course, the student will be able to:
1. Interpret blueprints and GD&T (Geometric Dimensioning & Tolerancing)
symbols in order to verify dimensions of a machine part.
2. Calculate and convert machine part measurements using US and metric mea
3. Verify parts measurements on a drawing using a micrometer reading.
4. Measure a part using Vernier principles.
5. Determine the geometric profile of a machine part.
6. Interpret the measurement of a machine part from a radius, diameter, or
angle, relative to absolute, coordinate, and incremental systems.
7. Utilize the surface plates to measure angular units of perpendicularity
and parallelism with required accuracy in metric and US systems.
8. Describe the application and operation of Coordinate Measuring Machines
(CMM) and Non-Contact measuring tools.
Topics and Scope
I. Understanding Dimensions and Tolerances
A. Gauging applications
B. Measurement tools and calculations
II. Units of measurements system
A. Converting metric to the US system
B. Vernier scale principles
III. Blueprint Reading
A. Interpreting GD&T (Geometric Dimensioning & Tolerancing) symbols
B. Dimensions representations on drawings using symbols
C. Calculations to describe degrees (angular units)
D. Using log tables
E. Utilizing sine bars and optical comparators
IV. Cartesian Coordinates
A. Coordinate and polar dimensions
B. Incremental dimensions
C. Absolute dimensions, relative to the number line system
V. Coordinate measuring machines (CMM)
B. Relationships to Vernier principles in decimal system
VI. Inspection Standards
A. ISO (International Organization for Standardization)
B. SPC (Standards of Professional Conduct)
C. ASME (American Society of Mechanical Engineers)
1. Assigned reading, 20 - 25 pages per week.
2. Weekly quizzes on assigned readings.
3. Given a print, interpret symbols, dimensions, and features of
coordinate measurements made with metrology tools and features.
4. Evaluate symbols, dimensions, views, and notes on 10 - 12 drawings.
Answer questions related to evaluation.
5. Select and visit 4 sites using CMM practices, observing
methods of inspection (metric and U.S. systems) with CMM machines
and support measurement tools and gauges. Write a 2 page report on each
site and present to class.
6. Given 10 parts, measure accuracy and consistency in relation to SPC
standards. Write a 2-3 page lab report.
7. Measure assigned parts from prints to verify correct dimensions with
micrometers, calipers, and comparators and fill in blanks on a blueprint.
8. Performance exam: Given a part, measure and insert dimensions on a
9. Oral report on a procedure for measuring a part (e.g., a gear).
Methods of Evaluation/Basis of Grade.
Representative Textbooks and Materials:
|Writing: Assessment tools that demonstrate writing skill and/or require students to select, organize and explain ideas in writing.||Writing
10 - 20%
|Problem solving: Assessment tools, other than exams, that demonstrate competence in computational or non-computational problem solving skills.||Problem Solving
15 - 20%
|Lab reports, Evaluate drawings.||
|Skill Demonstrations: All skill-based and physical demonstrations used for assessment purposes including skill performance exams.||Skill Demonstrations
15 - 20%
|Performance exams, Interpret dimensions on a drawing.||
|Exams: All forms of formal testing, other than skill performance exams.||Exams
35 - 45%
|Multiple choice, True/false, Matching items, Completion||
|Other: Includes any assessment tools that do not logically fit into the above categories.||Other Category
10 - 15%
|Attendance and oral report.||
Dimensioning and Tolerancing, The American Society of Mechanical
Engineers, ASME Y14.5M-1998.
Print Reading for Engineering and Manufacturing Technology. Madsen, David.