18
11.7 Grounding Requirements
The grounding of the electromagnetic flow meter is very important. If the grounding is
poor, it won’t work normally. The sensor and transmitter should be equipped with high-
quality independent grounding wire (The section area of the copper core is 1.6mm2).
The grounding resistance should be
<10Ω.
Diagram
Description
Grounding
Ring
The grounding ring is
needed if the pipe
connecting with the sensor
is insulating.
The same material as the
electrode should be
chosen, to prevent
corrosion by the liquid.
If the test medium is
abrasive, the neck
grounding ring should be
selected.
Grounding
Method
It is for installing the flow
meter on the metal pipe not
coated with insulating layer.
When installing the flow
mater on the plastic pipe
or the pipe with insulating
coating material, paints or
lining, grounding rings on
both ends of the sensor
should be installed.
When installing the flow
meter on the protective
pipe of cathode, the pipe
with the protection of
electrolytic corrosion
generally has insulating
walls and external sides.
Thus, during installation,
the grounding ring and the
flanges on the pipe should
be insulating.
11.8 Changing the Direction of the Transmitter Box
The transmitter box can change into four different directions as needed.
a. Changing the direction of the transmitter box for the integrated flow meter.
Remove 4 hex screws used to fasten the transmitter.
Rotate the transmitter to the target direction, and pay attention to the internal
connecting wire during rotation.
Fasten the transmitter again.
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