SICK LFP CUBIC

OPERATING INSTRUCTIONS | LFP CUBIC 8019918/ZJA6 / 2017-07-20 | SICK AG
Subject to change without notice
12
3 PRODUCT DESCRIPTION
3.2 Product characteristics
3.2.1 Device view
1
1
2
3
4
Fig. 1: LFP Cubic (standard version)
1 Sample probe
2 Electrical connection
3 Operating buttons
4 Display
3.2.2 Operating buttons
The sensor is operated using the display and operating buttons.
For a detailed description of the pushbuttons and their functions, see “8.1 Display and
pushbuttons”.
3.3 Product features and functions
3.3.1 Principle of operation
The LFP uses TDR (Time Domain Reectometry) technology.
This is a process to determine transit times of electromagnetic waves. The sensor
electronics generate a low-energy electromagnetic pulse, which is linked to and runs
along the probe.
If this pulse strikes the surface of the liquid to be measured, a portion of the pulse
is reected there and is conducted back up along the probe path to the electronics,
which then calculate the level based on the time dierence between the sent and the
received pulse.
The sensor can output this level as a continuous measured value (analog output) and
can also derive two and/or four freely positionable switching points from it (switching
outputs).
IO-Link communication is also available for the switching output (Q1),
see “8.1.3 IO-Link”.