Endress+Hauser Levelflex FMP56 Operating Instructions Manual page 40

Mounting
40
Devices with mounting thread are screwed into a welding boss or a flange and are usually
also secured with these.
• Tighten with the hexagonal nut only:
– Thread 3/4": Hexagonal wrench 36 mm
– Thread 1-1/2": Hexagonal wrench 55 mm
• Maximum permissible torque:
– Thread 3/4": 45 Nm
– Thread 1-1/2": 450 Nm
• Recommended torque when using the supplied aramid fibre seal and a process
pressure of 40 bar (580 psi):
– Thread 3/4": 25 Nm
– Thread 1-1/2": 140 Nm
• When installing in metal containers, take care to ensure good metallic contact
between the process connection and container.
Flange mounting
If a seal is used, be sure to use unpainted metal bolts to ensure good electrical contact
between probe flange and process flange.
Mounting rope probes
NOTICE
Electrostatic discharges may damage the electronics.
‣
Earth the housing before lowering the rope into the vessel.
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When lowering the rope probe into the vessel, observe the following:
• Uncoil rope and lower it slowly and carefully into the vessel.
• Do not kink the rope.
• Avoid any backlash, since this might damage the probe or the vessel fittings.
Mounting rope probes in a partially full silo
It is not always possible to empty a silo which is already in operation. If a minimum of
2/3 of the silo is empty, it is possible to install the probe into the partially filled silo. If
possible, make a visual check after the installation to see that the rope has not
tangled or is lying such that it can knot when the level falls. Before full accuracy is
obtained the probe rope must hang fully extended.
Levelflex FMP56, FMP57 HART
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A0012529
Endress+Hauser