
'
-
K
2
K
8
)X
OOVFDOHYDOXH
6WDUWRIVFDOHYDOXH
0D[LPXPOHYHO
6WDWLF
SUHVVXUH
&RQVWDQW
FRPSDULVRQ
OHYHO
/LTXLGILOOHG
ORZSUHVVXUHOLQH
7UDQVPLWWHU
UHIHUHQFHOLQH
K
Y
Measurement assembly on a closed container (strong condensate
formation)
Formula:
Start-of-scale value:
Δp
MA
= g · (h
U
· ρ
- h
V
· ρ')
Full-scale value:
Δp
MA
= g · (h
O
· ρ- h
V
· ρ')
h
U
Lower filling level Δp
MA
Start of scale value
h
O
Upper filling level Δp
ME
Full-scale value
h
V
Gland distance ρ Density of the measured medium in the
container
p Pressure ρ ' Density of fluid in the negative pressure
line corresponds to the prevailing
temperature there
g Acceleration due to gravity
The process connection on the negative side is a female thread
1
/
4
-18 NPT or an oval flange.
Lay the line for the negative pressure using a seamless steel tube 12 mm x 1.5 mm.
4.5
"Remote seal" installation
4.5.1 Remote seal installation
General installation instructions
● Keep the measuring system in the factory packing until it is installed in order to protect it
from mechanical damage.
● When removing from the factory packing and installing: ensure that damage to and
mechanical deformations in the membrane are prevented.
Installing/mounting
4.5 "Remote seal" installation
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 47
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