Emerson Micro Motion D Série Notice D'installation page 20

STEP 5. Grounding the sensor
Improper grounding could cause measurement error.
To reduce the risk of measurement error:
• Ground the flowmeter to earth, or follow ground
network requirements for the facility.
• For installation in an area that requires intrinsic safety,
refer to Micro Motion UL, CSA, SAA, or ATEX
documentation, shipped with the sensor or available
from the Micro Motion web site.
• For hazardous area installations in Europe, refer to
standard EN 60079-14 if national standards do not
apply.
The sensor can be grounded via the piping if the joints in the pipeline are
ground-bonded. If the sensor is not grounded via the piping, connect a
ground wire to the sensor grounding screw (see Figures 1-4) or the
junction box grounding screw.
If national standards are not in effect, follow these guidelines:
• Use copper wire, 14 AWG (2,5 mm²) or larger wire size for
grounding.
• Keep all ground leads as short as possible, less than 1 ohm impedance.
• Connect ground leads directly to earth, or follow plant standards.
Refer to the transmitter Quick Reference Guide for instructions on
grounding the transmitter.
CAUTION
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