Baumer LBFS User Manual
Operators instructions
CleverLevel switch, LBFS
CleverLevel switch, type LBFS is an universal level switch, which
can be used for all applications in liquids and solids with a DK-value
above 1,5
Safety instructions
This instrument is constructed and tested according to the current EUdirectives and packed in technically safe condition. In order to maintain
this condition and to ensure safe operation, the user must follow the
instructions and warnings given in this instruction.
During the installation local standards have to be observed. Ignoring the
warnings may lead to severe personal injury or substantial damage to
property.
The product must be operated by trained staff. Correct and safe operation of this equipment is dependent on proper transport, storage, installation and operation.
All electrical wiring must conform to local standards and the connection
must be made according to the connecting diagrams.
Before switching on the power supply take care that other equipment
is not affected. Ensure that the supply voltage and the conditions in the
environment comply with the specification of the device.
Before switching off the supply voltage check the possible effects on
other equipment and the processing system.
To obtain the specified protection degree, the LBFS must be mounted
with a compliant cable.
Description
The Level Switch LBFS designed to detect levels in tanks, media separation and provide empty-pipe detection or dry-run protection
for pumps.
A high frequency sweep signal is radiated from the sensor tip into the tank. The media will act as a virtual capacitor, which together
with a coil in the sensor head, will form a circuit creating the switch point signal. This virtual capacitance will depend of the dielectric value of the media.
Two output signals are available, Normally Open (NO) and Normally Closed (NC). By means of the FlexProgrammer 9701, a
damping of the output signal can be activated in case of a fluctuating media level, e.g. during tank filling. Additionally the output
signals NO and NC can be reversed.
The measurement is precise and unaffected by the mounting position in the tank. In the Flex-software a compensation for foam,
bubbles and condensate as well as sticky media can be set.
The Flex-software also features an adjustment facility making the user able to adjust the sensor to a specific media.
The Level Switch LBFS measures liquids such as water and oil. Even dry medias can be measured, eg. coal dust or plastic granulate.
Level Switch LBFS can be delivered with PNP output as well as NPN output.
The process connection can easily be sealed by use of Teflon Tape or by use of special welding adapter for the hygienic edition.
WARNING
This product contains no replaceable parts. In case of malfunction the product must be shipped to Baumer for repair.
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Operators instructions: 11109146 01 EN Page 1 / 8
2013-06-15 Design and specifications subject to change without notice
Measuring principle
Mounting
Operators instructions
CleverLevel switch, LBFS
The capacity (C) of the media is directly proportional to the dielectric value of the
media
A frequency between 100 and 180MHz is swept into the media
When the coil (L) and the capacitor (C) reach a resonance frequency, it will be
detected by the electrical circuit
The thread must be sealed e.g. by a gasket, an O-ring or Teflon® tape and tightened into the counterpart.
Recommended tighten max. 25...30 Nm
Refer to the data sheet “Accessories” for O-rings, gaskets and
other accessories.
If the PEEK tip or PEEK sealing rings for sliding connection is
damaged or seriously scratched, the instrument or sealing rings
should be replaced.
Mounting applications
Installation of 3A approved and EHEDG certified products:
1) Use only a 3A approved counter part.
2) The inspection hole should be visible and drained.
3) Mount the instrument in a self drained position.
4) Level the inner surface of the pipe with the counter part.
5) Welding's should be grinded to Ra= 0.8
LBFS-xx1/2/3/6xx.x LBFS-xx42x.x LBFS-xx5xx.x LBFS-xx71x.x
Media temperature versus ambient temperature
Media temperature °C
120
115
110
105
100
95
90
85
80
75
50 55 60 65 70 75 80 85 90
Ambient temperature °C
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Operators instructions: 11109146 01 EN Page 2 / 8
Dimensions
Operators instructions
CleverLevel switch, LBFS
22
G½ ISO 228/1 G¾ ISO 228/1 G1 ISO 228/1 ¾” NPT G½ hygienic G½ reverse
LBFS-xx1xx.x LBFS-xx2xx.x LBFS-xx3xx.x LBFS-xx6xx.x LBFS-xx4xx.x LBFS-xx5xx.x
M18×1
M18×1 Cable version Cable version
LBFS-xx1xx.x LBFS-x2xxx.x LBFS-x25xx-x
65
41
87
97
27
36
97
39
97
38
91
27
97
40
22
103
Ø27
97
G½
48
22
Electrical connections
Normally open (NO)
Function M12 plug Cable
+ VDC 1 Brown
NC 2 White
- VDC 3 Blue
NO 4 Black
Normally Closed (NC)
68
97
Connecting the FlexProgrammer, 9701
Disconnect the power supply before
connecting the FlexProgrammer 9701
to the level switch LBFS
Using Teach-In
Sophisticated settings for Teach-In as well as output type, diagnostics, data logging, tag no. and damping can be configured using
the FlexProgrammer 9701, either via Level Switch LBFS or programmed as stand alone.
FlexProgrammer 9701 stand alone menu
Press and simultaneously (the vertical arrows) to enter the
FlexProgrammer menu containing e.g. Teach-In and Auto zero functionalities.
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Press or to browse the menu
Press to access current menu point
Press to return to previous menu
Operators instructions: 11109146 01 EN 3 / 8
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