Principle Of Operation; Packaging, Transport And Storage - Siemens SITRANS LG260 Operating Instructions Manual

Application area
Functional principle -
level measurement
Packaging
Transport
Transport inspection
Storage
PBD-51041057
– Supplementary instructions manual "Plug connector for con-
tinuously measuring sensors" (optional)
– Ex-specific "Safety instructions" (with Ex versions)
– If necessary, further certificates
3.2

Principle of operation

The SITRANS LG260 is a level sensor with cable or rod probe for
continuous level measurement, suitable for applications in bulk solids.
High frequency microwave pulses are guided along a steel cable or
a rod. Upon reaching the product surface, the microwave pulses are
reflected. The running time is evaluated by the instrument and output-
ted as level.
Probe end tracking
To increase sensitivity, the probe is equipped with probe end tracking.
In bulk solids with a low dielectric constant, this function is very help-
ful. This is the case, for example, in plastic granules, packing chips or
in vessels with fluidized products.
Between a dielectric constant of 1.5 and 3, the function switches on, if
required. As soon as the level echo can no longer be detected, probe
end tracking is automatically activated. The measurement is contin-
ued with the last calculated dielectric constant.
The accuracy thus depends on the stability of the dielectric constant.
If you measure a medium with a dielectric constant below 1.5, probe
end tracking is always active. In this case, you have to enter the
dielectric constant of the bulk solid. A stable dielectric constant is very
important here.
3.3

Packaging, transport and storage

Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
SITRANS LG260 - Operating Instructions
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