Baumer LFFS User Manual
Operators instructions
CleverLevel switch, LFFS
CleverLevel switch, type LFFS 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 LFFS must be mounted
with a compliant cable.
Description
The Level Switch LFFS 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 capacity will depend of the di-electric
value (DK-value) of the media.
By means of the FlexProgrammer 9701 the output can be configured to either NPN, PNP or digital output signal. A damping of the
output signal can be activated in case of a fluctuating media level, e.g. during tank filling.
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 viscous 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 LFFS measures liquids such as water and beer as well as viscous, sticky fluids, such as honey, yoghurt, toothpaste and ketchup. Even dry medias can be measured, e.g. sugar or flour.
The Level Switch LFFS is resistant against CIP and SIP agents.
Hygienic installation is also possible with the comprehensive range of accessories, see the overview at page 6.
WARNING
When the top cover is removed, do not look directly at the blue LED with unshielded eyes or damage to retina may occur !
This product contains no replaceable parts. In case of malfunction the product must be shipped to Baumer for repair.
www.baumer.com
Operators instructions: 11109132 02 EN Page 1 / 12
2013-08-23 Design and specifications subject to change without notice
Operators instructions
CleverLevel switch, LFFS
Measuring principle
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.
Dimensions
G½ hygienic 3A DN38 hygienic G½ hygienic sliding connection
19,0
31,5
14,5
Mounting
Please refer to “Accessories” data sheet. The welding part has
an engraved mark or a leak hole. When the product has been
mounted and correctly tightened the gland or M12 plug will
align with this mark.
Make sure that the gland/plug is pointing downwards to prevent fluids from penetrating into the instrument.
Use only the authorised special designed accessories. The
product warranty is void when installed with other adapters.
Do not use PTFE, fibre or other gaskets. The PEEK tip against
the stainless steel welding part will perform a hygienic tightening provided that the guidelines have been followed.
Due to the measuring principle it is essential that the sensor tip
can “see” an ample amount of the metal shaft or welding part.
Safety
wire
100
or
250
Mounting instructions for sliding connection:
1) Clean the sliding shaft.
2) Mount the smallest ring against the media as indicated.
3) Tighten the G1/2 Hygienic sliding nipple at 25...30 Nm.
4) Replace the Washer ring kit when one or both parts are
permanently deformed or stick to the shaft of the sliding
connection.
WARNING
The Level Switch LFFS with sliding connection can be mounted
in installations with a static pressure up to 16 bar.
To prevent personal injuries or property damage it is essential
that the safety wire is mounted correctly and is undamaged.
Sliding
connection
G½
2 × PEEK
sealing
washers
Spare part set:
4401.8001
www.baumer.com Operators instructions: 11109132 02 EN Page 2 / 12
Mounting
Operators instructions
CleverLevel switch, LFFS
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
Example
with PM023
Tighten the union with a torque of:
Std. version 20...25 Nm.
Sliding connection 25...30 Nm.
WARNING
Cannot be
drained
Fitted
incorrect
Example
with 8126-928
Example
with 8126-916
After installation and configuration
Check the leak tightness of the sleeve.
Check the tightness of glands or M12 plugs.
Check the tightness of the cover
Leakage indication hole
must be places downwards
www.baumer.com Operators instructions: 11109132 02 EN Page 3 / 12
Operators instructions
CleverLevel switch, LFFS
Mounting connections
ISO2852 SMS 1145 Welding
DN38: CAM023.505 DN51: SAM020.051.1 for tank
DN51: CAM023.640 PM023
Variline, type N DIN 11851 Welding
VAM023 DN25: MAM020.025 for tank
DN40: MAM020.040 PM021
DN50: MAM020.050
Adapter Welding
G½ → G1 to pipe end
RAM020.1 DN25...50: PM022.1
DN65...100: PM022.2
Adapter Welding Ø35
1” level switch for tank/tube
LAM020.3 PM025
Adapter, industrial
G½ → G1
RAM020.2
Welding
for tank
8126916
Welding
for pipe end
8126928
On a welding adapter there is an
arrow or a 3A logo.
This must be placed upwards when
welding the adapter into a tank
(horizontal position).
This assures that the electrical connection will be pointing downwards
(opposite of the arrow; 3A logo)
Refer to data sheet ”Accessories Universal” for further
information
NOTE:
The LFFS must be mounted in a Baumer mounting
connection. If not, Baumer do not guarantee correct
function or tightness.
www.baumer.com Operators instructions: 11109132 02 EN Page 4 / 12
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