Principle Of Operation; Adjustment; Packaging, Transport And Storage; Accessories - SICK LFC Manual De Instrucciones

4 Mounting

3.2

Principle of operation

Application area
The LFC is a capacitive point level sensor for
point level detection
It is designed for industrial use in all areas of
process technology and can be used in water-
based liquids.
Typical applications are overfill and dry run pro-
tection. With a the small sensor unit, LFC can be
also mounted e.g. in thin pipelines. The sensor
allows use in vessels, tanks and pipes. Thanks
to its simple and robust measuring system,
LFC is virtually unaffected by the chemical and
physical properties of the medium.
It functions even under difficult conditions such
as turbulence, air bubbles, buildup, strong
external vibration or changing products.
If a malfunction is detected or in case of voltage
supply, the electronics takes on a defined swit-
ching status, i.e. the output is open (safe state).
Functional principle
An alternating electric field is generated at the
tip of the measuring electrode. If the sensor is
covered with medium, the resonance frequency
changes. This change is detected by the elect-
ronics and converted into a switching command.
Buildup is ignored to a certain degree and
therefore has no influence on the measurement.
3.3

Adjustment

The switching status of LFC can be checked
from outside (360° status indication).
3.4 Packaging, transport and
storage
Packaging
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 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
Transport must be carried out in due conside-
20
ration of the notes on the transport packaging.
Nonobservance of these instructions can cause
damage to the device.
Transport inspection
The delivery must be checked for completeness
and possible transit damage immediately at re-
ceipt. Ascertained transit damage or concealed
defects must be appropriately dealt with.
Storage
Up to the time of installation, the packages
must be left closed and stored according to the
orientation and storage markings on the outside.
Unless otherwise indicated, the packages must
be stored only under the following conditions:
•
Not in the open
•
Dry and dust free
•
Not exposed to corrosive media
•
Protected against solar radiation
•
Avoiding mechanical shock and vibration
Storage and transport temperature
•
Storage and transport temperature see
chapter " Supplement - Technical data -
Ambient conditions"
•
Relative humidity 20 ... 85 %
3.5

Accessories

The instructions for the listed accessories can
be found in the download area on our home-
page.
Threaded and hygienic socket
Various threaded and hygienic sockets are
available for devices with threaded version.
You can find further information in the "Technical
data"
4 Mounting
4.1

General instructions

Ambient conditions
The instrument is suitable for standard and
extended ambient conditions acc. to DIN/EN/
IEC/ANSI/ISA/UL/CSA 61010-1. It can be used
indoors as well as outdoors.
Process conditions
Note:
For safety reasons, the instrument must
only be operated within the permissible
LFC • Transistor (PNP)