Endress+Hauser Levelflex FMP51 Modbus Technical Information page 43

Levelflex FMP51 Modbus
Endress+Hauser
Plastic or glass tanks: Mounting the probe externally at the wall
1 Plastic or glass tank
2 Metall sheet with threaded sleeve
3 No free space between tank wall and probe!
Requirements
• The dielectric constant of the medium must be at least DC > 7.
• The tank wall must be non-conductvie.
• Maximum wall thickness (a):
– Plastic: < 15 mm (0.6")
– Glass: < 10 mm (0.4")
• There may be no metallic reinforcements fixed to the tank.
Mounting conditions:
• The probe must be mounted directly to the tank wall (no open space)
• A plastic half pipe with a diameter of approx. 200 mm (8"), or some other protective unit, must be
affixed externally to the probe to prevent any influences on the measurement.
• If the tank diameter is less than 300 mm (12"):
A metallic grounding sheet must be installed at the opposite side of the tank. The sheet must be
conductively connected to the process connection and cover about the half of the vessel' s
circumference.
• If the tank diameter exceeds 300 mm (12"):
A metal sheet with a diameter of at least 200 mm (8") must be mounted to the probe at the
process connection. Its orientation must be perpendicular to the probe (see above).
2
1
a
3
A0014150
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