Endress+Hauser Levelflex M FMP 40 Operating Instructions Manual page 23

Levelflex M FMP 40 with PROFIBUS-PA
Endress+Hauser
3.4.6 Notes on special installation situations
Fixing rope probe
• The end of the probe needs to be
secured if the probe would otherwise
touch the silo wall, the cone or another
part, or the probe comes closer than 0.5
m to a concrete wall. This is what the
internal thread in the probe weight is
intended for:
– for 4 mm rope:M14
– for 6 mm rope:M20
• Preferably use the 6 mm rope probe due
to the higher tensile strength when fixing
a rope probe
• The fixing must be either reliably
grounded or reliably insulated (see
accessories). If it is not possible to
mount the probe weight with a safe
earthed connection, it can be secured
using an isolated eyelet, which is
available as an accessory
(see page 80).
• In order to prevent an extremely high
tensile load and the risk of rope crack,
the rope has to be slack. Make the rope
longer than the required measuring
range such that there is a sag in the
middle of the rope that is ≥ 1cm/m (1"/
100") of the rope length.
Reliable, earthed mounting
sag of the rope:
≥
1cm/m of the rope
length
Reliable, isolated mounting
Mounting and
contact with a
bolt
4mm-rope: M14
6mm-rope: M20
3 Mounting
Mounting-kit isolated
(see accessories)
23