Siemens SITRANS P Instruções de Operação Página 48

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Assembly on a closed container
When taking measurements in a closed container without or with little condensate formation,
the negative pressure line is not filled. Lay the line in such a way that pockets of condensate
do not form. Install a condensation container if required.
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K
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Measurement assembly on a closed container (no or little
condensate separation)
Formula:
Start-of-scale value:
Δp
MA
= ρ · g · h
U
Full-scale value: Δp
ME
= ρ · g · h
O
h
U
Lower filling level Δp
MA
Start of scale value
h
O
Upper filling level Δp
ME
Full-scale value
p Pressure ρ Density of the measured medium in the
container
g Acceleration due to gravity
When
taking measurements in a closed container with strong condensate formation, you must
fill the negative pressure line (mostly with the condensate of the measured medium) and install
a condensate pot. You can cut off the device using the dual pneumatic block 7MF9001-2.
Installing/mounting
4.4 "Level" installation
SITRANS P, DS III series with HART
46 Operating Instructions, 09/2012, A5E00047092-08
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