mensor PCS 400 - Head Pressure Calculation (Figure 9.1)

Head Pressure Calculation
The pressure at the input port (P
2
in figure 9.1) of the Device Under Test (DUT) will be a positive
number if the standard is positioned higher than the DUT. If the standard is lower than the DUT
the head pressure correction will be a negative value. The equation used to calculate the head
pressure for a gas medium is:
To calculate head pressure for a liquid medium the equation is:
P
2
=P
1
+hxD
Pressure
Standard
Device
Under
Test
P1
(psi)
P2
(psi)
hininches
P2 = P1 (1 + h x Dpsi)
Difference in vertical height between the
center lines of the two pressure ports.
h=
Dpsi =
Gas density (refer to the "Gas Density" table).
Figure 9.1 - Head Pressure Calculation
PCS 400 APPENDIX
www.mensor.com 9-7