Endress+Hauser Profi Bus Levelflex M FMP40 Operating Instructions Manual page 24

Mounting
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Since the tensile forces are also heavily dependent on the viscosity of the product, a higher safety
factor is necessary for highly viscous products and if there is a risk of cornice build-up.
In critical cases it is better to use a 6 mm rope instead of a 4 mm one.
The same forces also act on the silo cover.
On a fixed rope, the tensile forces are definitely greater, but this can not be calculated.Observe the
tensile strength of the probes or ensure that the tensile strength of the probes is not exceeded.
Options for reducing the tensile forces:
• Shorten the probe
• If the maximum tensile load is exceeded, check whether it would be possible to use a non-contact
Ultrasonic or Level-Radar device.
3.4.8 Installation in liquid tanks
• When installing in agitation units, check whether a no-contact process (ultrasonic or radar) would
be better suited, especially if the agitator generates large mechanical loads on the probe.
• If Levelflex is, nevertheless, installed in tanks with agitators, it is better to use coax probes which
have a greater lateral loading capacity.
Standard installation
Using a coax probe offers great advantages when the viscosity of the product is ≤ 500 cSt and it is
certain that the product does not accumulate build-up:
• Greater reliability:
As of dielectric constant=1.4, measurement functions independently of all electrical properties in
all liquids.
• Internals in the tank and nozzle dimensions do not have any influence on measurement.
• Higher lateral load-bearing capacity than rod probes.
• For higher viscosity a rod probe is recommended, or using a non-contact measuring principle with
the Level-Radar Micropilot M.
Installation in horizontal and upright
cylindrical tanks
• Use the following types of probe for measuring
ranges
– up to 4 m (13 ft): rod probe (1) or coax
probe (2)
– up to 10 m (33 ft): separable probe
– above 10 m (33 ft): 4mm rope probe
• Installation and possible fixing as with bulk
solids.
• Any distance from wall, as long as occasional
contact is prevented.
• When installing in tanks with a lot of internals
or internals situated close to the probe:
Use a coax probe.
Levelflex M FMP40 PROFIBUS PA
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L00-FMP4xxxx-17-00-00-yy-021
Endress+Hauser