Endress+Hauser Fieldbus levelflex M FMP 40 Operating Instructions Manual page 20

3 Mounting
20
3.4.5 Installation in liquids 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.
Installation in horizontal cylindrical
and standing tanks
• Use a coax or rod probe for measuring
ranges up to 4 m. For anything over this
or if there is too free cover space use a 4
mm rope probe.
• Installation and possible fixing as with
bulk solids.
• Any distance from wall, as long as
occasional contact is prevented.
• Do not mount a rod or rope probe (1)
exactly central when using metallic
containers. Central mounting doesn't
impair coax probe (2) performance.
• When installing in tanks with a lot of
internals or internals situated close to
the probe: Use a coax probe.
Levelflex M FMP 40 with Foundation Fieldbus
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Endress+Hauser