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.
5.3.1
Mounting on the container
Mounting on 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.
● Use, for example, threaded plug with vent valve 7MF4997-1CP.
+
K
2
K
8
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Measurement assembly on an open container
Formula:
Lower range value: p
MA
= ρ · g · h
U
Upper range value: p
ME
= ρ · g · h
O
h
U
Lower filling level
Δp
MA
Lower range value
h
O
Upper filling level
Δp
ME
Upper range 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 with 4 to 20 mA/HART
52
Operating Instructions, 11/2019, A5E44852162-AC