Rockwell Automation 1734sc-IE4CH E+H Instruments via HART to PlantPAx User Manual - Manual (Page 127)

Rockwell Automation Publication PROCES-UM002A-EN-P - July 2014 127
Deltabar S Differential Pressure Appendix I
Advantages:
• Standard operating pressures: 160 bar and 420 bar
• High long-term stability
• Very high single-sided overload resistance
• Second process barrier (Secondary Containment) for enhanced integrity
The following is an example of flow measurement with Deltabar S and primary
element. The left is the Orifice place and the right is the Pitot tube.
Q Q
p
1
p
1
p
2
p
2
Q ~
Δp
Q ~
Δp
+ + – –
Item Description
Q Flow
p Differential pressure, p = p1 - p2