Endress+Hauser Fieldbus Levelflex M FMP45 Operating Instructions Manual page 18

Installation
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18
3.4.5 General instructions
Normally use rod probes. Rope probes are used in liquids for measuring ranges > 4m and with
restricted ceiling clearance which does not allow the installation of rigid probes.
Coax probes are not influenced by the installation conditions. They may also be operated
• in the filling curtain
• in arbitrary proximity to internal fittings
• at viscositys up to 500 cSt.
Mounting location
• Do not mount rod or rope probes in the filling
curtain (2).
• Mount rod and rope probes away from the
wall (B) at such a distance that, in the event of
build-up on the wall, there is still a minimum
distance of 100 mm between the probe and
the build-up.
• Mount rod and rope probes as far away as
possible from installed fittings. "Mapping "
must be carried out during commissioning in
the event of distances < 300 mm.
• Minimum distance of probe end to the
container floor (C):
– Rope probe: 150 mm
– Rod probe: 100 mm
– Coax probe: 10 mm
• When installing outdoors, it is recommended
that you use a protective cover (1) see
Accessories on → ä 77.
Note!
Seal for devices with G 1½" thread
The thread and the type of seal comply to DIN 3852 part 1, screwed end type A. Gaskets according
to DIN 7603 with a dimesnion of 48x55mm can be used for it. Please use a gasket according to this
standard in the form A, C or D and of a material that is resistant to your application.
Minimum distance B of rod and rope probes to the container wall:
The wall clearance can be chosen as desired as long as the probe does not touch the tank wall.
Note!
• There should no bridges to the wall created by soiling or highly viscous media.
Welding the probe into the vessel
Caution!
Before welding the probe into the vessel, it must be grounded by a low-resistive connection. If this
is not possible, the electronics as well as the HF module must be disconnected. Otherwise the
electronics may be damaged.
Levelflex M FMP45 with FOUNDATION Fieldbus
1
B
C
2
L00-FMP4xxxx-17-00-00-xx-007
Endress + Hauser