Endress+Hauser Levelflex HART FMP51 Brief Operating Instructions page 22

Mounting
6.2.3 Mounting the device
Mounting devices with thread
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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Levelflex FMP51, FMP52, FMP54 HART
Endress+Hauser
A0012528