Mounting
26 - EN FEX300, FEX500 CI/FEX300/FEX500-EN
4.6.4 Plastic pipes, non-metallic pipes or pipes with insulating liner
For plastic pipes or pipes with insulating lining, the ground for the measuring agent is provided
by the grounding plate as shown in the figure below or via grounding electrodes that must be
installed in the device (option). If grounding electrodes are used, the grounding plate is not
necessary.
1. Install the flowmeter sensor with grounding plate (3) in the pipeline.
2. Connect the terminal lug (2) for the grounding plate (3) and ground connection (1) on the
flowmeter sensor with the grounding strap.
3. Use a copper wire (min. 2.5 mm² (14 AWG)) to link the ground connection (1) to a suitable
grounding point.
G00664-01
1
1
3
3
2
2
„A“
Flange design Wafer type design
Fig. 23: Plastic pipes, non-metallic pipes or pipes with insulating lining
"A" Grounding in the case of a plastic terminal box (ProcessMaster only)
Important (Note)
• Grounding is illustrated using the example of the dual-compartment transmitter housing; in
the case of transmitters with single-compartment housing, grounding is to be performed as
shown.
• In the case of flowmeter sensors with plastic terminal boxes, perform grounding as shown
in "A".
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