Siemens SITRANS P - Manual (Page 184)

SITRANS P measuring instruments for pressure
Remote seals
Measuring setups with remote seals
2/184 Siemens FI 01 · 2009
2
Types of installation for level measurements (closed vessels)
H
O
H
V
Installation type E
Start-of-scale: p
MA
= r
FL
· g · H
U
- r
Oil
· g · H
V
Full-scale: p
ME
= r
FL
· g · H
O
- r
Oil
· g · H
V
Legend
p
MA
Start-of-scale value to be set
p
ME
Full-scale value to be set
r
FL
Density of medium in vessel
r
Oil
Density of filling oil in the capillary to
the remote seal
g Local acceleration due to gravity
H
U
Start-of-scale value
H
O
Full-scale value
H
V
Distance between the measuring points (spigots)
Installation type E
DH
H
U
H
U
DH
H
O
H
V
H
2
H
1
Installation type G, H and J
Start-of-scale: p
MA
= r
FL
· g · H
U
- r
Oil
· g · H
V
Full-scale: p
ME
= r
FL
· g · H
O
- r
Oil
· g · H
V
Legend
p
MA
Start-of-scale value to be set
p
ME
Full-scale value to be set
r
FL
Density of medium in vessel
r
Oil
Density of filling oil in the capillary to
the remote seal
g Local acceleration due to gravity
H
U
Start-of-scale value
H
O
Full-scale value
H
V
Distance between the measuring points (spigots)
H
1
H
2
Installation type J
between the measuring points, no vacuum
H
2
£ 7 m (23 ft), with halocarbon oil as
filling liquid only H
2
£ 4 m (13.1 ft)
H
1
H
2
Installation type H
below the lower measuring point
Installation type G
Pressure transmitter for differential pressure
above the upper measuring point, no vacuum
H
1
£ 7 m (23 ft), with halocarbon oil as
filling liquid only H
1
£ 4 m (13.1 ft)
© Siemens AG 2008