measurement and instrumentation ix

7/30/2019 Measurement and Instrumentation IX

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MEASUREMENT AND INSTRUMENTATION

Muhammad Sajjad


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THERMAL EXPANSION METHODS

Dimensions of all substances, whether

solids, liquids or gases, change with

temperaturemercury or colored alcohol

Industrial thermometer -200 to 1000 C


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if two strips of different metals are bonded together, any temperature change will

cause the strip to bend

It measures the displacement of the free

end for any given temperature change

Very little resistance must be offered to the end

of the strip, otherwise the spiral or helix will

distort and cause a false reading in the

measurement of the displacement

Used as temperature indicatorturn apointer of un-calibrated scale

Some produces electric output to give

displacement using LVDT


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relationship between volume and pressure according to Boyles law:PV = KT

change in pressure of the fluid is measured by a suitable pressure

transducer such as the Bourdon tube

Capillary tube should be 5 m long to remove environment disturbance

The quartz thermometer makes use of the principle that the resonant frequency

of

a material such as quartz is a function of temperature, and thus enables

temperature changes to be translated into frequency changes. The temperature-

sensing element consists of a quartz crystal enclosed within a probe (sheath)

Fiber opticthermomet

er

Self study


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velocity of sound through a gas varies with temperature according to theequation:

v = RT/M

It is used to measure cryogenic temperatures. What is cryogenic

temperatures???????

Color indicator works on the principle of that the color of various substances and

objects changes as a function of temperature

Normally used in furnaces to get the info about the temperature

The color-sensitive component within these is some form of metal salt (usually of

chromium, cobalt or nickel)

At a certain temperature,a chemical reaction takes place and a permanent

color change occurs in the paint or crayon, although this change does not

occur instantaneously but only happens over a period of time.


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GROUP PRESENTATIONS RULES(8 %)

Each group will spend 15 minutes on a given topics (noextra time will be given and marks will be deducted uponnot completing the task in an appropriate time)

An individual or all students of the group can give thepresentation

After presentation, there will be Questions /Answerssession (about 10 minutes).Questions can be asked byany student or teacher

No assurance of equal marks in a group

Minimum five groups will deliver their presentations in aday

Any student, misbehaving during presentation will expelfrom the class resulting zero number

It will be appreciated if you use English as communication

otherwise Urdu will be ok


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GROUP 1 (

Waqas Ahmed

Zubair Afzal

Yasir HussainNoman Ali

Rashid Iqbal

Ali Baig


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GROUP 2 ( )

M Ali Sharif

Shakeel Arshad

M Tayyab Adnan Asghar

Ashfaq Ahmed

Awais Ahmed


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GROUP 3 (

)

Hikmatullah Khan

Shujat Hussain

Abrar AhmedUbaidullah

Atif Nawaz

Waqas Ahmed


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GROUP 4 (

)

Tauqeer Ahmed

Sohaib Nazar

Tanzeel ur Rehman

M Haris

Zahid Ayaz

Sajjad Ali Shah


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GROUP 5 (

)

M Talha Arshad

Imran Khan

Tayyab AliNaveed Mustafa

Ammar Nawaz

M Umer Baig


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GROUP 6 (

)

Asad Mehmood

Ahsan Abdullah

Bilal AhmedMussab bin Misbah

Jawad Zafar

Hasnat Mubarik


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GROUP 7 (

),

Nasir Rafique

Waheed Murad

Hanzalla

Danish

Sikandar

Fayyaz Azam


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GROUP 8 (

)

Farrukh Abbas

Waqas Haider

Saleh Riaz M umair

Waqas Rashid

Uzair Ahmed


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GROUP 9 ( )

H M Muzammil

Tauqeer Ahmed

Shawaiz RafaqatM Usman Baig

Saad Jillani

Nida Fatima


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GROUP 10 (

)

Zubair Ahmed Khan

M Shoaib

TassawerHaneef

Abdullah Abbasi

Adnan Hamid

measurement and instrumentation ix

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