Linear Measurement

Objectives

To familiarize the student with the types, applications of calipers, micrometers and measurements.

At the completion of this experiment, the student will be able to:

1. Get familiar to the variety of the linear measurement tools, and know the type of a measurement tool needed to achieve a certain measurement.

2. Students will seek more efficient means of measure.

3. Take linear measurements with a certain accuracy depending on the instrument being used.

4. Clean, care for and store calipers, micrometers and dial indicators.

Apparatus

a. vernier caliper

b. dial caliper.

c. External micrometer.

d. 2-point inside micrometer.

Theory

  General specifications and functions of a caliper:

1. All stainless steel construction.

2. used to measure inside dimensions.

3. used to measure outside dimensions.

4. used to measure step dimension

5. convenient thumbscrew to lock a measurement in place.

6. accuracy equation:

  accuracy = 1 division main scale/no. of divisions on vernier scale