Caibration Of Bourdon Tube Pressure Lab Report

Petroleum Engineering
School of Engineering and Physical Sciences

PROCESS ENGINEERING A LAB REPORT 1

Name: Salimli Samir
Experiment Title: Calibration of Bourdon Tube Pressure Gauge
Date of Experiment: 12.09.2015;
Supervisor: Azizaga Azizov

Contents
Objective 3
Introduction 3
Apparatus 4
Theory 4
Procedure 6
Results 6
Discussion of Results 9
Conclusion 10
References 10

Objective

The main purpose for doing this experiment is to fulfill pressure calibration on a Bourdon tube pressure gauge using a dead weight tester.

Introduction

There are lots of apparatus which are using for calculating pressure and they are widely using for calculating pressure in both kind of fluids (static, dynamic). One of the main devices is Bourdon
For an instrument of value class 1.0 the maximum permitted distinction is +/− 1 % from the end scale esteem. With a showcase scope of 0...2.5 bars and an accuracy class of 1.0, this gives a most extreme admissible error of 0.025 bars over the whole scope of the scale. So here lower Omit and Upper limit were calculated just subtracting and adding 0.025 to Average Value.

In these graphs we plotted Actual Pressure (Increasing and decreasing weights) versus Theoretical Pressure.

Here Absolute Error versus Theoretical Pressure was plotted.

Discussion of
There is no doubt due to some reasons we got a little bit different numbers in comparison with theoretical values. Our highest error was 5%. This error would be adequate small for numerous engineering objectives, despite the fact that Bourdon gauges with a much higher exactness are accessible for precise work. Possible sources of error in this experiment can be said by the followings:

Wear and backlash in the gauge linkage can growth or lessening the pressure.
Air bubbles inside the tester unit may give rise to incorrect reading.
Static friction between the piston and cylinder may yield lesser gauge reading.
Reading the gauge may be incorrect due to weak eye vision.

Conclusion
In this experiment, our purpose was to calibrate a Bourdon tube gauge. Despite of some insignificant errors, the experiment has been carried out successfully. We used weight rings in order to load and unload the weight support and read off the pressure from the manometer. It was certain that when the weight increased and decreased the pressure inclined and declined respectively. From here it is clear to us which pressure is directly proportional with mass. As a result of this laboratory report we answered all needed questions and achieved the purpose of