Measurement instruments and tools

7/27/2019 Measurement instruments and tools

1/91

Measurement

Instruments &Tools

Accurate Measurement


2/91

Objectives

What is an accurate measurement

Review different types of measuring

instruments and their application

Learn how to calibrate instruments

Care and maintenance of instruments

Advanced diagnostic session


3/91

Why are these measuring devices

called instruments


4/91

Definition of Accurate

(from dictionary) free from error especially as the result of

care

able to give an accurate result

What happens if you do not measure accurately?


5/91

Examples of

Failed Measurements


6/91


7/91


8/91


9/91YouTube - LS1 Blows En ine
http://www.youtube.com/watch?v=bxB3rV9KpFg&feature=relatedhttp://www.youtube.com/watch?v=bxB3rV9KpFg&feature=relatedhttp://www.youtube.com/watch?v=bxB3rV9KpFg&feature=relatedhttp://www.youtube.com/watch?v=bxB3rV9KpFg&feature=relatedhttp://www.youtube.com/watch?v=bxB3rV9KpFg&feature=related


10/91

Name here


11/91

Measuring Instruments

Micrometers

Vernier Calipers

Dial Indicators Telescopic Gauges

Small Hole Gauges

Thickness Gauges Straight Edge


12/91

Outside Micrometer

Instrument for making precise linear measurements

of dimensions such as diameters, thicknesses, and

lengths of solid bodies.

It consists of a C-shaped frame with a movable jawoperated by a screw. The accuracy of the

measurements depends on the accuracy of the

screw-nut combination.


13/91

Imperial and Metric


14/91

Inside Micrometer


15/91

Depth Micrometer


16/91

Outside Micrometer

Inside Micrometer

Depth Micrometer

Can you identify the metric micrometer ?


17/91

Digital Micrometers


18/91

Combination Digital

Metric or Imperial

at the push of a

button


19/91

Parts of a Micrometer


20/91

Precision Instrument


21/91

Micrometer Donts

Do not drop

Do not run over

Do not over tighten (it is not a vice) Do not drop in chemicals

Do not leave it covered in grease

Do not let anyone borrow it Do not leave lying around


22/91

Micrometer Dos

Keep clean

Keep calibrated

Keep in storage box

Keep locked up

Keep away from everyone

Keep in practice reading it !


23/91

Using an Outside Micrometer


24/91


25/91


26/91

Using a Depth Micrometer


27/91

Using Inside Micrometer


28/91

Brake Drum Micrometer

Essentially it is a heavy duty Inside Micrometer


29/91


30/91

Measuring a brake rotor

What is the name of the micrometer in the picture?


31/91

Steps to reading a micrometer

Calibrate unit Identify scale (metric or imperial)

Identify range of micrometer (size)

Read Sleeve first number you see Read Sleeve for second number

(graduation)

Read Thimble

Note-if it is a 4 digit mic, read last numberon Sleeve (will discuss later)


32/91

Step # 1 Calibrate Micrometer

YouTube - measuring the thickness of a block using a micrometer

Before using any measuring instrument you must

check to ensure it is calibrated (accurate)

www.tgbcomputing.com

TGB Computing & Publishing
http://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.tgbcomputing.com/OnlineEd.htmhttp://www.tgbcomputing.com/OnlineEd.htmhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsI


33/91

Step # 2 Identify scale


34/91

Step # 3 Identify Range (size)


35/91

Where to find range

Imperial equivalent would be a 0-1


36/91

Step # 4 Reading the Sleeve and

Thimble

Imperial Micrometer

31

2

Number on Sleeve

Graduation on Sleeve

Number on

Thimble

Thimble numbers go from 0 to 20

Example shows 0.341


37/91

Sample Reading

First number

is the size of

the Mic

0.000

Example using a 0-1 Outside Micrometer

Second number

is the first

number

on Sleeve

.000

Third number

is .025 graduations

you see onSleeve

.025 x 2 = .050

Fourth number

is read on the

Thimble.016


38/91

Recording Measurement from Sample

Reading

First reading Range of Mic.

01 so the first number would be 0.000 Second reading number on Sleeve

Number you see is Zero so it would be .000

Third reading graduation on SleeveTwo graduations exposed so number is .050

Final number is number on the Thimble

Final number is .016


39/91

Total ReadingsFirst reading Range of Mic. 0.000

Second reading number on Sleeve 0.000

Third reading graduation on Sleeve 0.050

Final number is number on the Thimble 0.016

______

Total is ? 0.066


40/91

Reading an Imperial Micrometer


41/91


Exercise # 1 (2-3 mic)

Answer : 2.550


42/91



Answer: 0.802


43/91



Answer: 1.645


44/91

Reading a Metric Micrometer


45/91


Notice that Thimble numbers are higher than the

Imperial Mic ? Thats how you know it is Metric scale.

Thimble numbers go from 0 to 45


46/91

Example of 4 digit Metric Micrometer 0.0000


47/91


Exercise # 1 (0-25mm Range)

Answer : 12. 69


48/91


Exercise # 2 (0-25mm Range)

Answer : 23.99


49/91

Telescopic Gauges

Spring loaded

Measure large inside dia.


50/91

Using Telescopic Gauges


51/91


52/91

Small Holes Gauges

Measure smallInside Diameters


53/91


54/91


55/91

Dividers or Caliper

Instrument that consists of two

adjustable legs or jaws for

measuring the dimensions of

material parts.

Outside calipers measurethicknesses and outside diameters

of objects; inside calipers

measure hole diameters and

distances between surfaces.


56/91


57/91


58/91

Standard Vernier Caliper

Instrument for making very accurate linear or angular

measurements.

Introduced in 1631 by Pierre Vernier (c . 15801637), it uses

two graduated scales: a main scale similar to that on a ruler,and a specially graduated scale, the vernier, that slides

parallel to the main scale and enables readings to be made to

a fraction of a division on the main scale.


59/91

Why buy a Vernier Cal iper?

Durable Accurate measuring instrument

Multiple reading use

Easy to store and maintain

Readings that can be taken

Outside Diameter

Inside Diameter

Thickness Depth

Can this instrument not take place of a mic?


60/91

Dividers or Caliper


61/91

Small Holes Gauges


62/91

Telescopic Gauges


63/91

Dial Vernier Caliper

Digital Vernier Caliper


64/91

Digital Vernier Caliper

YouTube - Digital Caliper Bug
http://www.youtube.com/watch?v=NVJRen5qlok&feature=relatedhttp://www.youtube.com/watch?v=NVJRen5qlok&feature=relatedhttp://www.youtube.com/watch?v=NVJRen5qlok&feature=relatedhttp://www.youtube.com/watch?v=NVJRen5qlok&feature=relatedhttp://www.youtube.com/watch?v=NVJRen5qlok&feature=related


65/91


66/91

Using a Vernier Caliper

YouTube - all about verniers

YouTube - measuring a weight using a vernier caliper

How to use and read a Vernier Caliper

Checking calibration of Vernier Caliper and allowing

for error
http://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=related


67/91

Reading a Vernier Caliper # 12.641


68/91

Reading a Vernier Caliper # 2

1.581


69/91

Reading a Vernier Caliper # 20.508


70/91

Dial IndicatorsAny of a number of

deviation-type gauges that

indicate the amount by which

an object being gauged

deviates from the standard.This deviation is shown in

units of measurement, in

which movement of a

gauging spindle deflects apointer on a graduated dial


71/91

Calibration of Dial Indicator

Turn dial until pointer

aligns with the Zero

http://www.tgbcomputing.com/OnlineEd.htmhttp://www.tgbcomputing.com/OnlineEd.htm


72/91

Note-example of

Metric Dial IndicatorCalibration button


73/91

Dial Indicator with Stand


74/91


75/91


76/91

Very useful instrument for checking Steering

and Suspension components


77/91


78/91

S


79/91

Simpler Measuring Devices

Thickness Gauges

Flat Blade Feeler Gauges

Wire Gauges Taper Gauge

M i F l G


80/91

Metric Feeler Gauges

Imperial Feeler Gauges


81/91

Imperial Feeler Gauges


82/91


83/91


84/91


85/91


86/91


87/91

Straight Edge

Accuratelymachined surface


88/91


89/91


90/91


91/91

References - Links

YouTube - all about verniers

YouTube - measuring a weight using a

vernier caliperYouTube - measuring the thickness of a

block using a micrometer

www.tgbcomputing.com

http://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.tgbcomputing.com/OnlineEd.htmhttp://www.tgbcomputing.com/OnlineEd.htmhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=haK-eWV_JsIhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=iSHUTz3Cq0c&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=relatedhttp://www.youtube.com/watch?v=kTLhmptHAPc&feature=related

Documents

Measurement instruments and tools