Eng. Reem Mohanna

OBJECTIVES To be acquainting with different tools that may be used to obtain small-scale linear measurements (length, depth, diameter, thickness, etc.) To become familiar with vernier calipers.

Calipers Caliper is an instrument with two legs used for measuring linear dimensions. Calipers may be fixed, adjustable, or movable.

Caliper Parts

Types of Calipers Inside caliper Outside caliper Divider caliper Odd leg caliper Vernier Caliper Digital Caliper Dial Caliper Depth caliper

Inside caliper

Outside caliper

Divider caliper

Odd leg caliper

Vernier Caliper

Digital Caliper

Dial caliper

Depth caliper

Vernier Caliper Reading

Digital Caliper Reading

Dial Caliper Reading 5 mm mm = 5.11mm

Basic Statistics Average Standard Deviation 3/17/201617DOE Lecture 1

Results VernierDigitalDial Trial # 1 Trial # 2 Trial #3 Trial # 4 Trial #5 Average Standard Deviation

Results cont.

Questions 1. Describe the procedure of the experiment. 2. Determine class average and standard deviation for the caliper measurements. 3. What is the percentage of error and accuracy of each caliper? 4. Based on these dose one of the instruments consistently provide more repeatable results? 5. What are the sources of error in the dimensional measurement with caliper?