
IM-P309-02
MI Issue 2
32
10.2 Installation and servicing
The devices described in this manual are to be installed and serviced only by qualified
technical personnel.
Warning
Before servicing the device, it must be completely switched off, and
disconnected from all peripheral devices. The technician must also
check to ensure that the device is completely off-circuit. Only original
replacement parts are to be used.
Spirax Sarco accepts no liability for any loss or damage of any kind arising from
improper operation of any product, improper handling or use of any replacement part,
or from external electrical or mechanical effects, overvoltage or lightning. Any such
improper operation, use or handling shall automatically invalidate the warranty for
the product concerned.
Contact our customer service department if your device needs repair or if you need assistance
in diagnosing a problem with your device
11.1 Installation of magnetic-inductive flowmeters
At the installation of the magnetic-inductive flow sensor the instructions and notes of
the assembly instructions and operating manuals have to be followed. Also, observe the
grounding, potential equalization and internal grounding guidelines.
11.2 Potentials
All outputs are electrically isolated from the auxiliary power, the sensor circuit and from
each other. The housing and the interference suppression filters of the power supply are
connected to PE.
The electrodes and measuring electronics are related to the potential of the function earth
FE of the sensor. FE is not connected to PE, but may be connected with each other in the
sensor junction box. If the sensor is grounded by using ground disks (earthing rings), these
must in connected with the function earth FE.
At a separate assembly of sensor and transmitter the outer screen of the connecting cable is
connected to the transmitter housing and has PE potential. The inner screens of the electrode
line are connected to FE inside the junction box of the sensor and to the mass (Gnd) of the
transmitters electronics.
Details of all wirings, terminals and drawing can be found in the section 8.9 Electrical
connection .
11. Commissioning
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