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 centrally positioned and that it does not restrict the movement of the
flange's seal diaphragm in any way. Otherwise, the seal of the process connection is not
guaranteed to be tight.
2. Screw on the pressure transmitter's flange.
3. Observe the installation position.
See also
Commissioning the device with display (Page 11)
5.3.1
Mounting on the container
Assembly on an open container
A line is not required when taking measurements in an open container since the negative side
is connected with the atmosphere.
Ensure that no dirt enters the open connection ports. For example by using connection screws
with a 7MF4997-1CP vent valve.
+
)XOOVFDOHYDOXH
6WDUWRIVFDOHYDOXH
K
2
K
8
Measurement assembly on an open container
Formula:
Start of scale value: p
MA
= ρ · g · h
U
Full-scale value: p
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
Installing/mounting
5.3 Installation (level)
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA
47