The document summarizes calibration procedures for pressure balances at KRISS up to 500 MPa. It discusses calibrating a 100 MPa pressure balance and a 500 MPa test gauge. The basic theory of pressure calculation is presented along with equations for determining parameters like effective piston area and pressure distortion coefficient from calibration data. Methods for calculating uncertainty are also summarized. Videos are included showing the calibration setup and process.

1. HYDRAULIC PRESSURE BALANCE
CALIBRATION IN KRISS
Gigin Ginanjar, Sumarno
Pressure Laboratory Puslit –KIM-LIPI

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)

5. CALIBRATION SET UP
A1
A2
A typical experimental arrangement for calibrating
pressure balances

6. PICTURE OF CALIBRATION SETUP
Standard : Ruska 2485
Test: DHI 7302

7. VIDEO OF CALIBRATION .

8. VIDEO OF CALIBRATION ..

9. CALIBRATION DATA

10. DATA ANALISYS
Determining Parameter of Pressure balance
Effective Area Of Piston (Ao)
...(3)
...(4)
...(5)
...(6)
...(7)

11. ...(8)
...(9)
...(10)
...(11)
Pressure Distortion Coefficient (λ)

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

13. UNCERTAINTY

14. RESULT

15. 500 MPa CALIBRATION
Standard : KRISS 1 GPa Standard
Test : HBM 500MPa

16. ANOTHER VIDEO OF
CALIBRATION

17. Thank you