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Bourdon Gage

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Bourdon Gage
"fluid mechanics lab"

Experiment number "1"
(bourdon gauge apparatus)

Report date: 20/2/2011

Delivered date:27/2/2011

Submitted by: Eyyass Bassam Hamdan

Major: mechanical engineering

Student number: 30815150521

To Doctor : Abd-el hadi

Lecture time: Sunday, 8-11

Summary: In this experiment we are going to measure the pressure of gage and absolute by using a dead weight device which it use bourdon tube to measure the pressure.

Introduction: We are going to explain the way of this experiment : 1- Bring the dead weight device and take the data's about the device as radius and pressure when no weight is applied . 2- Start putting the loads on the device starting it with 0.5 kg and increasing linearly by 0.5 kg for each step until reach 3 kg . 3- Begin taking readings from the pressure gage reader of the bourdon tube which its by bar . 4- Tabulate the data in a tablet and draw graph.

Results and discussion: The given data it's taken in advance :
W free= 1kg , d=2 cm , R=1 cm , A=0.000314159 m2, and the reads are in the tablet below : error٪ | error | P cal (bar) | Pavg (bar) | P-(bar) | P+ ( bar) | M(kg) | 0.04167 | -0.013 | 0.312 | 0.325 | 0.33 | 0.32 | 1 | 0.00427 | -0.002 | 0.468 | 0.47 | 0.5 | 0.44 | 1.5 | 0.038462 | 0.024 | 0.624 | 0.6 | 0.6 | 0.6 | 2 | 0.01282 | -0.01 | 0.78 | 0.79 | 0.8 | 0.78 | 2.5 | 0.05769 | -0.054 | 0.936 | 0.99 | 0.99 | 0.99 | 3 |

From data's above we can see that by increasing the load the pressure will increase linearly. Now we will see the graph which it describe the relation between the P cal and Pavg (bar) , the graph is below :-

now from the graph above we can see that the y axe is considered as Pcal and the x axe is considered as P avg .

Conclusion:
As seen above we found that by increasing the loads in the piston of the device the pressure will increase , and by increasing the calibration pressure the average pressure will

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