Siemens SITRANS F M Intermag 2, Operating Instructions Manual

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Installation
3-2
SITRANS FM Intermag 2 Flow Transmitter
Operating Manual - A5E00102775-03
3.1 General Information
A magnetic-inductive flow measuring device is made up of the following
components:
S
a SITRANS FM Intermag 2 transmitter and
S
a SITRANS FM 711 series sensor or
an S1 or S2 probe
These components are either connected directly with each other in a
compact version or separately from each other in a remote version.
Installation of these components is described in this chapter. Make
sure the measuring device is protected from direct sunlight when
installing it outdoors.
! Warning
These devices meet the requirements of IP 67 degree of protection.
Proper installation is a prerequisite for compliance with this degree of
protection. Please observe the operating steps and instructions in this
chapter.
The maximum permissible ambient and medium temperatures must be
observed at all times.
The information in section 3.6 is to unconditionally observed for devices
with explosion protection.
! Caution
If the surface of the sensor or sensor tube can get hotter than 50
º
C in
the application, fire protection and/or a warning sign must be provided.
3.2 Installation in Pipelines
3.2.1 Potential equalization (reference potential)
The sensor must be at the same potential as the medium for an
accurate measurement. This is guaranteed when the connecting flange
of the pipe is made of metal and a perfect electrical connection is
established to the sensor through the fastening screws. In this case the
medium, pipe and transmitter are connected with each other in the
sense of a potential equalization. In the case of internally electrically
isolated pipes, the medium in the pipe must be applied to a reference
potential by additional measures (e.g. by grounding rings).