Mounting Instructions; Extraction Forces; Lateral Load; Mounting 2.1 Mounting Instructions - Vega EL 11 Operating Instructions Manual

Mounting
2 Mounting

2.1 Mounting instructions

General
Different mediums and requirements to the
measurement require various installations.
Hence the following instructions should be
noted.

Lateral load

Note that the electrode is not subjected to
strong lateral forces. Mount the electrode in a
position in the vessel where no interfering
influences such as e.g. stirrers, filling opening
etc. occur. This is mainly valid for very long rod
and cable electrodes.
Fig. 2.1 Lateral load
Capacitive electrodes EL 4 ... 20 mA - compact

Extraction forces

In case of strong extraction forces e.g. during
filling or settling of solids, high tensile loads can
be caused.
In these cases use for short measuring
distances a rod electrode, as a rod is generally
more stable. If due to the length or the
mounting position a cable electrode should be
necessary, the electrode should not be
strained, but only equipped with a gravity
weight as then the cable can more easily follow
the product movements. Note that the electrode
cable does not touch the vessel wall.
Pressure
In case of gauge or low pressure in the vessel,
the mounting boss must be sealed on the
thread. Use the attached seal ring. Check if the
seal ring is resistant against the medium.
Isolating measures such as e.g. the covering of
the thread with Teflon tape can interrupt the
electrical connection in case of metal vessels.
Hence earth the electrode on the vessel.
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