Sensor Grounding - BASI BFM921 User Manual

BASI
Vibration
To avoid mechanical damage protect both electronic unit and sensor against mechanical vibrations. When
strong vibrations are possible, both the input and output pipe must be mechanically fixed or the remote
version with a separate electronic unit should be used.
Overheating
To avoid overheating, the electronic unit should be protected against direct sunlight especially in areas with
a warm climate with ambient temperatures over 30 °C. If necessary a sunshade has to be mounted over the
electronic unit or a remote version with a separate electronic unit should be used.

2.2 Sensor grounding

Caution!

Do not switch the flow meter on if it's not properly grounded.

Follow instructions in chapter 3 : Preparing for start up for proper electrical installation
before switching flow meter on.
Proper grounding is critical for correct flow meter operation. The sensor is equipped with screw connection
for a grounding wire. This screw has to be connected to both pipeline flanges. Use Copper wire to connect
between the flange and the grounding screw on the sensor.
If the pipeline is made of an electrically nonconductive material, or if the pipe is lined with a similar material,
special grounding rings must be installed between flanges.
Sensor grounding without grounding rings
Operation manual
Electromagnetic flowmeter BFM921
Sensor grounding with grounding rings
9