Precision Measuring Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Precision Measuring

Precision Measuring Precision measuring tools are needed for accuracy Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Precision Measuring Precision – How close together or repeatable the results are A precise measuring instrument will give nearly the same result each time that it is used. Accuracy – How close a measurement is to the accepted value For example, a balance loaded with a standard 100g weight should read 100g. If it doesn’t, then the balance is inaccurate. Precision measuring tools are needed for accuracy

Precision Measuring Precision = REPROCUCIBILITY Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Precision Measuring Precision = REPROCUCIBILITY Checked by repeated and repeated measurements. Accuracy = CORRECTNESS Checked by using a different form of measurement and obtaining the same value

Tools for Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Steel Rule Micrometer

Tools for Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Digital Caliper One of the most common tools for reverse engineering is the dial caliper because of its versatility. Dial Caliper

The dial caliper is a precision measuring instrument. Reading a Dial Caliper Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring The dial caliper is a precision measuring instrument. The caliper’s blade is broken into inches and tenths of an inch (graduations). inch { Each inch is broken into ten parts, each part is 1/10 or 0.1 of an inch

The caliper’s dial graduations show thousandths (.001) of an inch. Reading a Dial Caliper Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring The caliper’s dial graduations show thousandths (.001) of an inch. The reference edge keeps track of larger increments; the dial shows us smaller increments.

(the same as 1/10 of an inch) Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring One full revolution of the pointer on the dial equals one hundred thousandths (.100) (the same as 1/10 of an inch)

Dial Caliper Parts Inside Measuring Faces Clamp Screw Dial Blade Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Inside Measuring Faces Clamp Screw Dial Blade Fine Adjustment Screw Dial Clamp Screw Outside Measuring Faces

2 Reading a Dial Caliper Step 1: Read inches from the blade Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Step 1: Read inches from the blade 1 to 6 inches 2

2 3 Reading a Dial Caliper Step 2: Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Step 2: Read tenths of an inch from the blade 2 3 1 in. – 6 in. 0 to 9 tenths of an inch

2 3 2 8 Reading a Dial Caliper Step 3: Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Step 3: Read thousandths of an inch from the dial 2 3 2 8 1 in. – 6 in. .001 to .099 of an inch 0 to 9 tenths of an inch

Dial Calipers Measure Thickness or Outside Diameter Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Dial Calipers Measure Thickness or Outside Diameter

Dial Calipers Measure Thickness or Outside Diameter Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Dial Calipers Measure Thickness or Outside Diameter Inside Diameter or Space Width

Dial Calipers Measure Thickness or Outside Diameter Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Dial Calipers Measure Thickness or Outside Diameter Inside Diameter or Space Width Depth

Dial Calipers Measure Thickness or Outside Diameter Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Dial Calipers Measure Thickness or Outside Diameter Inside Diameter or Space Width Depth Step Distance

Discussion Questions List measurement tools… Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Discussion Questions List measurement tools… Steel Rule Tape Measure Dial Caliper Meter Stick Explain which one of the tools listed would be best to use and why when measuring: -The hallway -Engineering Notebook -Pencil diameter -Height of your desk

Precision Measuring Gateway To Technology® Unit 1 – Lesson 1.3 – Measuring Image Resources Microsoft, Inc. (2008). Clip Art. Retrieved October 10, 2008, from http://office.microsoft.com/en-us/clipart/default.aspx Wikimedia commons (2008). Retrieved October 15, 2008, from http://commons.wikimedia.org/wiki/ImageCaliper