Securing The Probe - Endress+Hauser Levelflex FMP51 Operating Instructions Manual

Mounting
6.3

Securing the probe

6.3.1 Securing rope probes
C
2
A Sag of the rope: ³ 1 cm per 1m of the probe length (0.12 inch per 1 ft of the probe length)
B Reliably grounded end of probe
C Reliably isolated end of probe
1: Mounting and contact with a bolt
2 Mounting kit isolated
• The end of the probe needs to be secured under the following conditions:
if otherwise the probe sporadically comes into contact with the wall of the vessel, the outlet
cone, internal fittings or other parts of the installation.
• The end of probe can be secured at its internal thread
rope 4 mm (1/6"), 316: M 14
• The fixing must be either reliably grounded or reliably insulated. If it is not possible to mount
the probe weight with a reliably insulated connection, it can be secured using an isolated
eyelet, which is available as an accessory .
• In the case of a grounded fixing the Positive echo option must be selected in the Expert
® Sensors ® EOP evaluation ® EOP search mode parameter. Otherwise the automatic
probe length correction will not work.
• In order to prevent an extremely high tensile load (e.g. due to thermal expansion) 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/(1 m rope length) [0.12
inch/(1 ft rope length)]. Tensile load limit of rope probes:
18
B
1
Levelflex FMP51, FMP52, FMP54
Endress+Hauser
A0012609