2. SCOPE
• Range of Calibration from 5 up to 500 MPa
• Excercise for this training consist
- 100 MPa Pressure Balance Calibration
- 500 MPa Test Gauge Calibration
- Preparation for Interlaboratory
Comparison
3. The applied pressure can be calculated by the definition of
pressure as force per unit area.
...(1)
where :
Pressure (P) in Pascal (Pa)
Force (F) in Newton (N)
Area (A) in Meter square (m2)
Local gravity (g) in Meter per second square (m/s2)
A
mg
A
F
P
BASIC THEORY
4. BASIC THEORY
]
)
)(
(
1
[
1
1
0 r
c
p
m
a
i
i
t
t
p
A
c
g
m
Pe
i
where :
Pe represents pressure at reference level
Ao represents effective area at Patm, reference
temperature (tr)
t represents working temperature
...(2)
12. UNCERTAINTY CALCULATION
Type A uncertainty
A0 Eff. Area at zero pressure 4.9031E-06 m2
(a)
Def. Coeff. 6.8863E-07 MPa -1
(b)
Sy Std. Dev. of y 3.6127E-11
Sa Std. Dev. of a 3.7995E-11
Sb Std. Dev. of b 5.7243E-13
R Estimated Cor. Coeff. 9.5949E-01
r(a,b) Corelation Coeff. -9.0509E-01
ABS(R)>0.8 ABS(R)<0.8
Ae 4.903077E-06 m2
Ae 4.903280E-06 m2
uAe(max) 2.798786E-11 m2
uAe 4.966076E-11 m2
uA 5.7 ppm uA 10.1 ppm