Level Switch LFFS
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.
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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.
When the top cover is removed
do not look directly at LED
with unshielded eyes or
damage to retina may occur !!
WARNING
This product contains no replaceable parts.
In case of malfunction the product must be shipped to Baumer for repair
Description
The Level Switch LFFS designed to detect levels in tanks, media
separation and provide empty-pipe detection or dry-run protection for
pumps.
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.
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 of the
media.
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, youghurt, toothpaste and
ketchup. Even dry medias can be measured, eg. sugar or flour.
By means of the FlexProgrammer 9701 the output can be configured
The Level Switch LFFS is resistent against CIP and SIP agents.
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 Hygienic installation is also possible with the comprehensive range of
tank filling.
accessories, see the overview at page 6.
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Installationsanleitung 5850-020
Seite 1
Measuring principle
The media acts as a virtual capacitor
from the sensor tip to the metal shaft
or the welding part.
Mechanical Installation
Welding parts / Clamps
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.
Mounting
Use only the authorised special designed accessories.
The product warranty is void when installed with other adapters.
Do not use teflon, paper 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.
Tighten the union with a torque of:
Std. version 20...25 Nm.
Sliding connection 25...30 Nm.
After Installation and Configuration
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Check the leak tightness of the sleeve.
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Check the tightness of glands or M12 plugs.
Check the tightness of the cover.
Dimensional Drawings
[mm]
dia. 55
Sliding
connection
length,
refer to
ordering
data
Safety chain
Read WARNING
58
M16 gland
M12 plug
AF22
G1/2
44
19
G1/2 Hygienic sliding nipple
Washer ring kit, 2 items
Type no. 4401 8001
included
31.5
18
G1/2 Hygienic connection
3A/DN38 Hygienic connection
O-ring EPDM incl.
G1/2 Hygienic,
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 and the Level Switch LFFS to slide out of
the welding part or mounting accessory it is essential that the safety
chain
is mounted correctly and undamaged.
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Seite 2
Washer Ring Kit for the Sliding Connection
Mounting instructions:
Washer ring kit for sliding connection, Type no. 4401 8001
dia. 19
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.
19
8.7
CAUTION: This end towards the mounting
accessory and the media.
Electrical Connection
Output
Teach-in
Sensor
4
5
6
M12 plug:
Case
3
1
2
- or (+)
+ or (-)
12...36 VDC
4
3
1
2
1: Brown
2: White*
3: Blue
4: Black
*To avoid unintended Teach-In, be aware not to
connect the Teach-In pin or expose it to any electrical
noise during normal operation.
M12plug
Electrical Installation
Normally Open
PLC
Active High
0 mA
50 mA
LED
-
+
+
+
12.5...36 VDC
-
PNP Output
50 mA max.
12.5...36 VDC
12.5...36 VDC
-
Digital Output
50 mA max.
NPN Output
50 mA max.
Normally Closed
PLC
50 mA
0 mA
+
LED
-
12.5...36 VDC
PNP Output
50 mA max.
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-
Active Low
-
+
12.5...36 VDC
NPN Output
50 mA max.
+
12.5...36 VDC
Digital Output
50 mA max.
Installationsanleitung 5850-020
Seite 3
Configuration
Accessories
Disconnect the power supply before
connecting the FlexProgrammer 9701
to the Level Switch LFFS
1
2
The FlexProgrammer 9701 is a dedicated tool to configure all
Baumer configurable Flex-products.
1
2
Type No. 9701-0001 complies:
FlexProgrammer
Cable with 2 aligator clips
Cable from FlexProgrammer to M12 plug for TE2
Cable from FlexProgrammer to M12 Plug for LFFS, LBFS, CPX
USB cable
CD with the FlexProgram software
FlexProgrammer 9701
Red clip
1
2
Black clip
Note: Ambient temperature range 0...50°C
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Seite 4
Teach-In Using the FlexProgrammer 9701
Sophisticated settings for Teach-In as well as output type, diagnostics, data logging, tag no. and damping can be configured using
the FlexProgrammer 9701. Integrated Help-menus will give full instructions.
Teach-In Manually
Make sure that power is on before Teach-In.
For best Teach-In it is important the product is fixed in the final application.
During Teach-In mode the light intensity of the LED will decrease to protect your eyes.
Step
To do
LED
Result
1
Connect terminal “Teach-In” to -VDC
(T1 or T2) for 3.5 Sec.
Flash 1 time per Sec.
Ready for Teach-In
2
With “no media present” connect “Teach-In” to
-VDC shortly
Light for 2 Sec. and
then flash
Register “empty” state. Note.
3
With “media present” connect “Teach-In” to
-VDC shortly
Light for 2 Sec.
Register “full” state, store and return to
normal operation with the new settings
If Teach-In for some reason do not succeed, the Level Switch LFFS will enter “Error State” and reload factory settings automatically.
The factory settings can always be reloaded by connecting the terminal “Teach-In” to -VDC for more then 6.5 Secs.
A reloaded factory settings will be confirmed by pulsing light intensity 3 times.
Note.
If the media is sticky, foamy, powdery or in other ways leaving parts of the media at the sensor tip this situation has to be established
also during the Teach-In process. Otherwise a faulty calibration can be the result.
Error State Description
LED
Result
Error State
Blinking, 3 short and 1
long blink
Can normally be fixed by powering off and
on. Alternatively remake the “Teach-In”
procedure or make a configuration by the
Flexprogrammer 9701.
Note.
Please observe that the Level Switch LFFS has been factory adjusted to measure liquids with DK-values > 2, such as oil.
In case the media has a lower DK-value e.g. powder, a Teach-In procedure must be carried out for the media alternatively a manual
adjustment using the FlexProgram software. The adjustment must be made at the medias working temperature to avoid faulty measurements due to temperature drift.
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Seite 5
Accessories - Overview
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LFFS-xx1
LFFS-xx2
LFFS-xx3/4
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CAM023
MAM02x-xxx
74 - 03
PM023
Welding part 3A/DN38 hygienic
81 26-916
LAM020-1
PM021
VAM 023
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SAM020-051-1
PM022-x
Welding part 3A/DN38 hygienic
81 26-928
Please refer to the data sheet
“FlexBar Accessories” for this
accessory.
RAM020-1
PM025
RAM020-2
Please refer to the data sheet
“Accessories Universal” for these
accessories.
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Seite 6
The Sliding Connection (Figure 1)
External length of sliding connection
1)
Insulation
2)
4)
Lumpy or sticky media
3)
The drawing shows how the sliding connection can be used for at least
4 applications:
1) Mounted at the top of a tank to adjust to a maximum level.
2) Serving as a cooling neck in high media temperature applications.
3) Adjusted to place the sensor tip deeper inside the tank.
4) To reach in through insulation material.
It is essential that the max. ambience temperature for the electronics
is never exceeded. For ATEX approved products please refer to table 1.
Example, how to read Curve 1:
A 250 mm sliding connection is mounted in a tank with a total insert
length of 150 mm. Hence the external length of the sliding connection
will be 250 - 150 = 100 mm.
The media temperature will be max. 160 °C.
Read the x-axis at 100 mm an the y-axis at 160°C and find that the
ambient temperature must be kept below 50°C. In case the radiated
heat from the tank will cause a higher ambient temperature at the
housing efficient insulation of the tank must be established.
The working conditions for the sliding connection in different media
temperatures and specified ambient temperatures can be found in
curve 1.
Media Temperature versus External Length of Sliding Connection (Curve 1)
Media Temperature
Kølehals for FLS
°C
Mikael Jensen / 2009-08-26
210
200
190
Tamb max. 40 °C
180
Tamb max. 60 °C
170
Tamb max. 75 °C
160
150
140
130
120
110
100
Tamb max. 85 °C
90
80
70
60
50
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
External length of sliding connection (mm) See figure 1
NB: Std. + 3A/DN38 = 35 mm extenal length
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3-A Certificate
The 3-A mark is valid only when the product is mounted in a 3-A
marked counter part and installed according to the installation manual.
Use also a 3-A marked O-ring or gasket if relevant. The 3-A marked
products conforms to the 3-A Sanitary Standard criteria. Materials and
surfaces fulfill the FDA demands and are certified by EHEDG.
Level Switch LFFS, example
EPDM O-rings supplied with 3-A marked products are conform to
Sanitary Standard Class II (8% milk fat max.)
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EPDM gaskets supplied with 3-A marked products are conform to
Sanitary Standard Class I (8% milk fat max.)
PEEK natura
Angle > 135 deg.
Mounting of 3A Approved and EHEDG certified Products
Max. ± 85°
4)
5)
1)
2)
Max. ± 175°
3)
Installation of 3A approved and EHEDG certified products:
1) Use only a 3A approved counter part.
Refer to the data sheet “Accessories” for O-rings, gaskets and other
accessories.
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) Weldings should be grinded to Ra= 0.8
Ex-Configuring
Warnings
The FlexProgrammer 9701 configuring unit must not be connected to
the Level Switch LFFS within the hazardous area.
WARNING
This product contains no replaceable parts.
In case of malfunction the product must be shipped to Baumer for repair.
Configuring procedure:
a) Disconnect mains from the 4...20 mA loop circuit.
b) Disconnect the Level Switch from the circuitry within
the hazardous area.
c) Uninstall and bring the Level Switch to the safe area.
d) Connect the FlexProgrammer 9701 and perform the
configuring session.
e) Re-install the Level Switch in the hazardous area.
f) Connect the power supply to the circuit.
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Conditions for Ex-Certification (Table 1)
Connection Type
Tamb °C
Media Temp. max. °C
Std. & 3A/DN38
-40...85
85
-40...60
95
{2}
-40...40
115
{2}
-40...85
85
-40...60
150
{2}
-40...40
175
{2}
-40...85
85
-40...60
195
{2}
-40...40
200
{2} {3}
Sliding 100 mm
Sliding 250 mm
Note
Note {2}: Provided that the sensor tip at the instrument is the only part in contact with the media.
Note {3}: Max. allowed media temperature.
Ex ia IIC T5, ATEX II 1G - Installation
A Level Switch LFFS-1xx is Ex ia IIC T5, ATEX II 1G approved for
application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing
guidelines for zone 0 with a barrier.
A certified Ex ia or isolation barrier with the maximum values
Umax = 30 VDC ; Imax = 0.1 A ; Pmax = 0.75 W must be used.
Ex-data
Supply range
24...30 VDC
Temperature class
T1...T5: Internal inductivity
Li < 10 µH
Internal capacity Ci < 33 nF
Barrier data
U < 30 VDC ; I < 0.1 A ; P < 0.75 W
See table 1
Safe area
Zone 0/1
PNP out
3
2
1
NO
NC
COM
+
C
22...120VDC or
90...253 VAC
-
B
A
Level Switch LFFS
Isolating Module
PROFSI3-B25100-ALG-LS
NB: Only valid for PNP output
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Ex tD A20 IP67 T100, ATEX II 1D - Installation
A Level Switch LFFS-2xx is Ex tD A20 IP67 T100°C, ATEX II 1D
approved for application in hasardous areas in accordance with the
current EU-directives. The product must be installed in accordance
with prevailing guidelines for zone 20 without a barrier.
Ex-data
Supply range
12,5...30 VDC, max 100 mA
Temperature class
T100: See table 1
Out
+
12.5...30 VDC
External lamp
Level Switch LFFS
Ex nA II T5, ATEX II 3G - Installation
A Level Switch LFFS-3xx is Ex nA II T5, ATEX II 3G approved for
application in hasardous areas in accordance with the current EUdirectives. The product must be installed in accordance with prevailing
guidelines for zone 2 without a barrier.
Ex-data
Supply range
12.5...30 VDC, Max. 0.1A
Temperature class
T1...T5: See table 1
Remote Lamp
12.5..30 VDC
Level Switch LFFS
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5850 020_EN/2011-09-14 This data sheet may only be reproduced in full.
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Seite 12