NTRODUCTION
A pressure gauge is a device for measuring the pressure of a fluid placed in a closed space. There are several methods for determining a pressure in the order of magnitude of the latter.
PURPOSE OF THE HANDLING
The main purpose of this manipulation is the calibration of a gauge metal spring with a hydraulic press to calibrate
DESCRIPTION OF THE EXPERIMENT INSTALLATION
NOMENCLATURE
DESCRIPTION OF THE EXPERIMENT INSTALLATION
NOMENCLATURE
designation
|
units
|
notation
|
Type
|
Mass of piston
|
Kg
|
MP
|
given
|
Diameter of piston
|
m
|
d
|
given
|
Piston surface
|
m²
|
A
|
A=
|
Mass of weight
|
Kg
|
MW
|
given
|
total mass
|
Kg
|
M=MW+MP
|
calculated
|
Reading of the pressure gauge
|
kN/m²
|
G
|
read
|
Cylinder pressure
|
kN/m²
|
P
|
P=
|
Absolute error of pressure
|
kN/m²
|
G-P
|
calculated
|
% Error in pressure
|
%
|
%
|
calculated
|
EXPERIMENTAL PROCEDURE CALIBRATION
-Let's put kPa gauge scale in terms of horizontal working
-'s Patch came the spring tube manometer
-Let's remove the piston and determine its mass and its additional masses
Let's fill-cylinder press water
-Us eliminate air bubbles circuit
-Shut the isolation valve on the side of the gauge reaches
Introduce the piston-and give a rotational movement to minimize friction
During rotation, the piston include manometer reading for different masses
-'s Patch came the spring tube manometer
-Let's remove the piston and determine its mass and its additional masses
Let's fill-cylinder press water
-Us eliminate air bubbles circuit
-Shut the isolation valve on the side of the gauge reaches
Introduce the piston-and give a rotational movement to minimize friction
During rotation, the piston include manometer reading for different masses
Data calculations
Piston area A = 0.0002452 m²
Piston diameter d = 0.01767 m²; piston mass m = 0.5 kg, g = 9.81
Results of calculations
Piston diameter d = 0.01767 m²; piston mass m = 0.5 kg, g = 9.81
Results of calculations
Piston mass
Mp
kg
|
Diameter piston
d
m
|
Piston surface
A
m2
|
Mass of weight
Mw
kg
|
total mass
M
kg
|
pressure gauge
G
KN/m2
|
cylinder pressure
P
KN/m2
|
absolute error
Error
KN/m2
|
%
error manometer
|
0.5
|
0.07167
|
2.452 *10-4
|
0
|
0.5
|
20
|
20.004
|
0.004
|
0.01
|
0.5
|
0.07167
|
2.452 *10-4
|
0.5
|
1
|
40
|
40.008
|
0.008
|
0.01
|
0.5
|
0.07167
|
2.452 *10-4
|
1
|
1.5
|
58
|
60.012
|
2.012
|
3.35
|
0.5
|
0.07167
|
2.452 *10-4
|
1.5
|
2
|
78
|
80.01
|
2.01
|
2.51
|
0.5
|
0.07167
|
2.452 *10-4
|
2
|
2.5
|
98
|
100.02
|
2.02
|
2.02
|
0.5
|
0.07167
|
2.452 *10-4
|
2.5
|
3
|
118
|
120.02
|
2.02
|
1.68
|
0.5
|
0.07167
|
2.452 *10-4
|
3
|
3.5
|
135
|
140.028
|
5.028
|
3.59
|
0.5
|
0.07167
|
2.452 *10-4
|
3.5
|
4
|
154
|
160.032
|
6.032
|
3.77
|
0.5
|
0.07167
|
2.452 *10-4
|
4
|
4.5
|
170
|
180.036
|
10.036
|
5.77
|
0.5
|
0.07167
|
2.452 *10-4
|
4.5
|
5
|
180
|
200.040
|
20.04
|
10.01
|
0.5
|
0.07167
|
2.452 *10-4
|
5
|
5.5
|
200
|
220.044
|
20.044
|
9.11
|
-Comparison of the pressure gauge and cylindrical:
The pressure increased with the masses added. While for the cylindrical pressure, we almost the same values at the beginning and there is a variation to the end.
Relative and absolute-error
-error curves based on the level calculated for each pressure measurement
According to our results, the accuracy of the device is about right. For that, according to the values given by the device and the calculated values are approximate.
According to our results, the accuracy of the device is about right. For that, according to the values given by the device and the calculated values are approximate.
Conclusion
In short, the study of our construction allows us to determine the actual pressure on a fluid and compared with the values given by the manometric apparatus. According to perform the work requested, we found in our table above that the values found are close to those given by the gauge
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