Siemens SITRANS P500, Operating Instructions Manual, Page: 42 / 238

Install
4.6 "Level" installation
SITRANS P500 with HART
42
Operating Instructions, 12/2014, A5E02344528-09
Procedure
To install the pressure transmitter for level, proceed as follows:
1.
Attach the seal to the container's mating flange.
Ensure that the seal is centrically positioned and that it does not restrict the movement of
the flange's seal diaphragm in any way as otherwise the tightness of the process
connection is not guaranteed.
2. Screw on the pressure transmitter's flange.
3. Observe the installation position.
4.6.3 Connection of the negative pressure line
4.6.3.1 Measurement in an open container
Connection of the negative line is not necessary when measuring in an open container, since
the negative side is connected to the atmosphere.
Formula:
Start of scale value
p
MA
= ρ • g • h
U
Full scale value
p
ME
= ρ • g • h
O
h
U
Start of scale value Δp
MA
Start of scale value to be adjusted
h
O
Full scale value Δp
ME
Full scale value to be adjusted
p Pressure ρ Density of the measured medium in
the container
g Acceleration due to gravity
Measurement assembly on an open container