JUMO flowTRANS MAG H01, Руководство по эксплуатации

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4 Mounting
48
4.5 Grounding
4.5.1 General information
When grounding the device, the following points must observed:
•
For plastic lines or pipelines with insulating lining, the ground is provided by the grounding plate or
grounding electrodes.
• If the pipe section is not free from external interference voltages, it is recommended that one ground-
ing washer is fitted upstream and one downstream of the sensor.
• For measurement reasons, the potential of the station ground should be identical to the pipeline po-
tential.
• An additional ground via the connection terminals is not required.
4.5.2 Metal pipe with fixed flanges
Using the example of the dual-compartment transmitter housing
1. Establish the connection between the ground terminal (1) of the sensor, the pipeline flanges and a
suitable grounding point using a copper wire [at least 2.5 mm
2
(14 AWG)] according to the figure.
IMPORTANT (NOTE)!
There is the additional document "JUMO flowTRANS MAG S/H - Safety Manual Ex for devices 406012 -
406019" for the measuring systems that are used in potentially explosive areas.
The information and data contained in the document must also be strictly observed.
IMPORTANT (NOTE)!
If the sensor is installed in plastic or stoneware pipelines or in pipelines with an insulating lining, transient
currents may flow through the grounding electrode in special cases (e.g., with corrosive media, acids
and lye).
Over the long term, this may destroy the sensor, since the grounding electrode degrades electrochemi-
cally. In these cases, the ground must be provided using grounding plates.
Here, a grounding plate must be installed upstream and downstream of the device.
Flange version
Model 406012, 406013, 406015 and 406016
Connection flange design
Model 406015 and 406016
(1) Ground terminal
(1)
(1)