Mounting On The Container - Siemens SITRANS 7MF03.0 Compact Operating Instructions

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.
3.3.1

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.
Measurement assembly on an open container
h
U
h
O
p
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA
Lower filling level
Upper filling level
Pressure
Formula:
Start of scale value: p
Full-scale value: p
+
Δp Start of scale value
MA
Δp Full-scale value
ME
ρ Density of the measured medium in the
container
g Acceleration due to gravity
Installing/mounting
3.3 Installation (level)
= ρ · g · h
MA U
= ρ · g · h
ME O
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