Siemens SITRANS F M MAG 8000 Operating Manual page 7

MAG 8000 & MAG 8000 CT
Installation instructions
(continued)
Potential equalization
Bonding & grounding
2. Installation
SFIDK.PS.026.D9.02
Gaskets are installed and connection flange
must have a smooth surface and be in line with
the sensor. Gaskets are recommended, but are
not included with the flowmeter.
Advice for gasket selection:
• Only use flat, rubber gaskets.
• Thickness 1...6 mm (0.0...0.02 ft) dependant
on gap/tolerance.
• The inner diameter must not protrude into the
bore of the flowmeter.
• The material should be compatible with the
process fluid.
• The hardness should be maximum Durometer
of 75 Shore A.
Liquid potential equalization or grounding is
accomplished with the built-in grounding
electrodes. The electrodes electrically bond
the liquid to the meter to provide a stable and
accurate measurement.
The sensor body must be grounded using
grounding/bonding straps and/or grounding
rings to protect the flow signal against stray
electrical noise and/or lightning. This ensures
that the noise is carried through the sensor
body and a noise-free measuring area within
the sensor body.
Metal pipelines
On metal pipelines, connect the straps to both
flanges with 6 mm (1/4") screws. Bonding/
grounding straps are grounding straps are pre-
mounted on the flowmeter included with the
flowmeter.
Plastic pipelines
On plastic pipelines and lined metal pipes,
optional grounding rings must be used at both
ends.
Grounding rings is not included in the delivery.
Combination of metal and plastic pipelines
A combination of metal and plastic requires
straps for metal pipeline and grounding rings
for plastic pipeline.
Bonding/grounding straps, grounding rings and
straps are not included with the sensor.
All straps or grounding wires should be #12
AWG (or heavier) copper wire and connected
with 6 mm screws.
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