Supplementary documents appropriate to the ordered version come
with the delivery. You can find them listed in chapter "Product
description".
Instructions manuals for accessories and replacement parts
Tip:
To ensure reliable setup and operation of your LEVEL SWITCH 8111,
we offer accessories and replacement parts. The corresponding
documentations are:
l Operating instructions manual "Oscillator LEVEL SWITCH 8111/
8112"
Editing status: 2012-04-12
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output3
1 About this document
1 About this document
1.1 Function
This operating instructions manual provides all the information you
need for mounting, connection and setup as well as important
instructions for maintenance and fault rectification. Please read this
information before putting the instrument into operation and keep this
manual accessible in the immediate vicinity of the device.
1.2 Target group
This operating instructions manual is directed to trained qualified
personnel. The contents of this manual should be made available to
these personnel and put into practice by them.
1.3 Symbolism used
Information, tip, note
This symbol indicates helpful additional information.
Caution: If this warning is ignored, faults or malfunctions can
result.
Warning: If this warning is ignored, injury to persons and/or serious
damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.
Ex applications
This symbol indicates special instructions for Ex applications.
lList
The dot set in front indicates a list with no implied sequence.
àAct
1Sequence
4LEVEL SWITCH 8111 • with NAMUR output
ion
This arrow indicates a single action.
Numbers set in front indicate successive steps in a procedure.
32048-EN-120418
2 For your safety
2 For your safety
2.1 Authorised personnel
All operations described in this operating instructions manual must be
carried out only by trained specialist personnel authorised by the plant
operator.
During work on and with the device the required personal protective
equipment must always be worn.
2.2 Appropriate use
The LEVEL SWITCH 8111 is a sensor for level detection.
You can find detailed information on the application range in chapter
"Product description".
Operational reliability is ensured only if the instrument is properly used
according to the specifications in the operating instructions manual as
well as possible supplementary instructions.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbitrary
conversions or modifications are explicitly forbidden.
2.3 Warning about misuse
Inappropriate or incorrect use of the instrument can give rise to
application-specific hazards, e.g. vessel overfill or damage to system
components through incorrect mounting or adjustment.
2.4 General safety instructions
This is a high-tech instrument requiring the strict observance of
standard regulations and guidelines. The user must take note of the
safety instructions in this operating instructions manual, the countryspecific installation standards as well as all prevailing safety
regulations and accident prevention rules.
The instrument must only be operated in a technically flawless and
reliable condition. The operator is responsible for trouble-free
operation of the instrument.
During the entire duration of use, the user is obliged to determine the
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new
regulations.
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output5
2 For your safety
2.5 Safety label on the instrument
The safety approval markings and safety tips on the device must be
observed.
2.6 CE conformity
This device fulfills the legal requirements of the applicable EC
guidelines. By attaching the CE mark, we provide confirmation of
successful testing.
2.7 SIL conformity
LEVEL SWITCH 8111 fulfills the requirements to functional safety
according to IEC 61508 resp. IEC 61511. You find further information
in the Safety Manual "LEVEL SWITCH".
2.8 Safety instructions for Ex areas
Please note the Ex-specific safety information for installation and
operation in Ex areas. These safety instructions are part of the
operating instructions manual and come with the Ex-approved
instruments.
6LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
3 Product description
1
2
3
3.1 Structure
3 Product description
pe of delivery
Sco
Constit
uent parts
The scope of delivery encompasses:
l LEVEL SWITCH 8111 point level switch
l Documentation
- this operating instructions manual
- Safety Manual "Functional safety according to IEC 61508
resp. IEC 61511 (SIL)"
- Ex-specific "Safety instructions" (with Ex versions)
- if necessary, further certificates
The LEVEL SWITCH 8111 consists of the components:
l Housing cover
l Housing with electronics
l Process fitting with tuning fork
Fig. 1: LEVEL SWITCH 8111
1Housing cover
2Housing with electronics
3Process fitting
Type
label
The type label contains the most important data for identification and
use of the instrument:
l Article number
l Serial number
l Technical data
l Article numbers, documentation
In addition to the type label outside on the instrument, you find the
serial number also inside the instrument.
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output7
3 Product description
3.2 Principle of operation
Appli
cation area
Func
tional principle
LEVEL SWITCH 8111 is a point level sensor with tuning fork for level
detection.
It is designed for industrial use in all areas of process technology and
can be used in liquids.
Typical applications are overfill and dry run protection. With a tuning
fork of only 40 mm length, LEVEL SWITCH 8111 can be also mounted
e.g. in pipelines from DN 32. The small tuning fork allows use in
vessels, tanks and pipes. Thanks to its simple and robust measuring
system, LEVEL SWITCH 8111 is virtually unaffected by the chemical
and physical properties of the liquid.
It functions even under difficult conditions such as turbulence, air
bubbles, foam generation, buildup, strong external vibration or
changing products.
Fault monitoring
The electronics module of LEVEL SWITCH 8111 continuously
monitors via frequency evaluation the following criteria:
l Strong corrosion or damage on the tuning fork
l Loss of vibration
l Line break to the piezo drive
If one of these faults is detected or if the power supply fails, the
electronics takes on a defined output status (safe condition).
The tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx. 1200 Hz. The piezos are
fixed mechanically and are hence not subject to temperature shock
limitations. The frequency changes when the tuning fork is covered by
the medium. This change is detected by the integrated electronics
module and converted into a switching command.
Volta
ge supply
LEVEL SWITCH 8111 is a compact instrument, i.e. it can be operated
without external evaluation system. The integrated electronics
evaluates the level signal and outputs a switching signal. With this
switching signal, a connected device can be operated directly (e.g. a
warning system, a pump etc.).
The data for power supply are specified in chapter "Technical data".
3.3 Operation
The switching condition of LEVEL SWITCH 8111 can be checked
when the housing is closed (signal lamp). With the basic setting,
products with a density > 0.7 g/cm³ (0.025 lbs/in³) can be detected.
The instrument can be adapted if products with lower density should
be measured.
On the electronics module you will find the following indicating and
adjustment elements:
8LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
3 Product description
l Signal lamp for indication of the switching condition (green/red)
l DIL switch for sensitivity adjustment
l Mode adjustment for selection of the switching condition (A/B)
3.4 Storage and transport
Packag
ing
Tr
ansport
Tr
ansport inspection
Stora
ge
Stora
ge and transport
temperature
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
according to DIN EN 24180.
The packaging of standard instruments consists of environmentfriendly, recyclable cardboard. The sensor is also equipped with a
protective cap of ABS. For special versions, PE foam or PE foil is also
used. Dispose of the packaging material via specialised recycling
companies.
Transport must be carried out under consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or
concealed defects must be appropriately dealt with.
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:
l Not in the open
l Dry and dust free
l Not exposed to corrosive media
l Protected against solar radiation
l Avoiding mechanical shock and vibration
l Storage and transport temperature see chapter "Supplement -
Technical data - Ambient conditions"
l Relative humidity 20 … 85 %
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output9
4 Mounting
4 Mounting
4.1 General instructions
Suita
bility for the proc-
ess conditions
Swit
ching point
Make sure that all parts of the instrument exposed to the process, in
particular the sensor element, process seal and process fitting, are
suitable for the existing process conditions. These include above all
the process pressure, process temperature as well as the chemical
properties of the medium.
You can find the specifications in chapter "Technical data" and on the
type label.
In general, LEVEL SWITCH 8111 can be installed in any position. The
instrument only has to be mounted in such a way that the tuning fork is
at the height of the desired switching point.
The tuning fork has lateral markings (notches) that indicate the
switching point with vertical mounting. The switching point refers to
water with the basic setting of the sensitivity switch ≥ 0.7 g/cm³
(0.025 lbs/in³). When mounting LEVEL SWITCH 8111, make sure that
this marking is at the height of the requested switching point. Keep in
mind that the switching point of the instrument is shifted if the medium
has a density other than water - water 1 g/cm³ (0.036 lbs/in³). For
products < 0.7 g/cm³ (0.025 lbs/in³) and > 0.5 g/cm³ (0.018 lbs/in³) the
density switch must be set to ≥ 0.5 g/cm³.
10LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
2
3
1
4
Fig. 2: Installation vertical
1
1Switching point approx. 13 mm (0.51 in)
2Switching point with lower density
3Switching point with higher density
4Switching point approx. 27 mm (1.06 in)
1Switching point
2Marking with screwed version on top, with flange versions directed to the
flange holes
With flange versions, the fork is directed as follows to the flange holes.
Fig. 5: Fork position with flange versions
Moisture
Use the recommended cables (see chapter "Connecting to power
supply") and tighten the cable gland.
You can give your instrument additional protection against moisture
penetration by leading the connection cable downward in front of the
cable entry. Rain and condensation water can thus drain off. This
applies mainly to outdoor mounting as well as installation in areas
where high humidity is expected (e.g. through cleaning processes) or
on cooled or heated vessels.
12LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
Fig. 6: Measures against moisture penetration
4 Mounting
ansport
Tr
Press
Handlin
Welde
ure/Vacuum
g
d socket
Caution:
Do not hold LEVEL SWITCH 8111 on the tuning fork. Particularly with
flange or tube versions, the tuning fork can be damaged just by the
weight of the instrument. Transport coated instruments very carefully
and avoid touching the tuning fork.
Remove the packaging or the protective cover just before installation.
The process fitting must be sealed if there is gauge or low pressure in
the vessel. Before use, check if the seal material is resistant against
the measured product and the process temperature.
The max. permissible pressure is specified in chapter "Technical data"
or on the type label of the sensor.
The vibrating level switch is a measuring instrument and must be
treated accordingly. Bending the vibrating element will destroy the
instrument.
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Use the hexagon above the thread for screwing in.
4.2 Instructions for installation
LEVEL SWITCH 8111 has a defined thread starting point. This means
that every LEVEL SWITCH 8111 is in the same fork position after
being screwed in. Remove therefore the supplied seal from the thread
of LEVEL SWITCH 8111. This seal is not required when using a
welded socket with O-ring in front.
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output13
1
4 Mounting
Keep in mind that this welded socket is not suitable for coated
instrument versions.
Screw LEVEL SWITCH 8111 completely into the welded socket. The
later position can be determined already before welding. Mark the
appropriate position of the welded socket. Before welding, unscrew
LEVEL SWITCH 8111 and remove the rubber ring from the welded
socket. The welded socket has a marking (notch). Weld the socket
with the notch facing upward, or in case of pipelines (DN 32 up to
DN 50), aligned with the direction of flow.
Fig. 7: Marking on the welded socket
1Marking
Adhesiv
e products
In case of horizontal mounting in adhesive and viscous products, the
surfaces of the tuning fork should be vertical in order to reduce buildup
on the tuning fork. On the screwed version you will find a marking on
the hexagon. With this, you can check the position of the tuning fork
when screwing it in. When the hexagon touches the seal, the thread
can still be turned by approx. half a turn. This is sufficient to reach the
recommended installation position.
With flange versions, the fork is directed to the flange holes.
When used in adhesive and viscous products, the tuning fork shouldprotrude into the vessel to avoid buildup. For that reason, sockets for
flanges and mounting bosses should be avoided when mounting
horizontally.
Inflow
ing medium
If LEVEL SWITCH 8111 is mounted in the filling stream, unwanted
false measurement signals can be generated. For this reason, mount
LEVEL SWITCH 8111 at a position in the vessel where no
disturbances, e.g. from filling openings, agitators, etc., can occur.
Fl
ows
To minimise flow resistance caused by the tuning fork, LEVEL
SWITCH 8111 should be mounted in such a way that the surfaces of
the blades are parallel to the product movement.
14LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
4 Mounting
Enamel coating
Instruments with enamel coating should be treated very carefully and
shocks should be avoided. Unpack LEVEL SWITCH 8111 directly
before installation. Insert LEVEL SWITCH 8111 carefully into the
vessel opening and avoid touching any sharp vessel parts.
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output15
5 Connecting to power supply
5 Connecting to power supply
5.1 Preparing the connection
safety instructions
Note
Ta
ke note of the
safety instructions for Ex applications
Volta
ge supply
Conne
ction cable
Conne
ction ca-
ble for Ex applications
Always keep in mind the following safety instructions:
l Connect only in the complete absence of line voltage
In hazardous areas you must take note of the respective regulations,
conformity and type approval certificates of the sensors and power
supply units.
Connect the operating voltage according to the following diagrams.
Take note of the general installation regulations. As a rule, connect
LEVEL SWITCH 8111 to vessel ground (PA), or in case of plastic
vessels, to the next ground potential. On the side of the instrument
housing there is a ground terminal between the cable entries. This
connection serves to drain off electrostatic charges. In Ex applications,
the installation regulations for hazardous areas must be given priority.
The data for power supply are specified in chapter "Technical data".
The instrument is connected with standard two-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should be
used.
Use cable with round cross-section. A cable outerdiameterof 5 … 9 mm
(0.2 … 0.35 in) ensures the seal effect of the cable gland. If you are
using cable with a different diameter or cross-section, exchange the
seal or use a suitable cable gland.
In hazardous areas, only use approved cable connections for LEVEL
SWITCH 8111.
Take note of the corresponding installation regulations for Ex
applications.
Cover all housing openings conforming to standard according to
EN 60079-1.
5.2 Connection procedure
With Ex instruments, the housing cover may only be opened if there is
no explosive atmosphere present.
Proceed as follows:
1 Unscrew the housing cover
2 Loosen compression nut of the cable entry
3 Remove approx. 10 cm (4 in) of the cable mantle, strip approx.
1 cm (0.4 in) of insulation from the ends of the individual wires
4 Insert the cable into the sensor through the cable entry
16LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
N
N AM UR
( IE C 60 94 7- 5- 6 )
m ax .
m in .
S im ul .
+ -
0,5 g / cm
3
0,7 g / cm
3
3
6
5
7
1
2
4
nics and connec-
Electro
tion compartment
5 Connecting to power supply
5 Open the terminals with a screwdriver
6 Insert the wire ends into the open terminals according to the wiring
plan
7 Tighten the terminals with a screwdriver
8 Check the hold of the wires in the terminals by lightly pulling on
them
9 Tighten the compression nut of the cable entry. The seal ring must
completely encircle the cable
10 Screw the housing cover back on
The electrical connection is finished.
5.3 Wiring plan, single chamber housing
Fig. 8: Electronics and connection compartment, single chamber housing
1Control lamp
2DIL switch for characteristics reversal
3DIL switch for sensitivity adjustment
4Ground terminal
5EMC filter element
6Simulation key
ing plan
Wir
7Connection terminals
For connection of the amplifier according to NAMUR (IEC 60947-5-6,
EN 50227). You can find further information in the " Technical data".
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output17
1 2
++-
-
5 Connecting to power supply
Fig. 9: Wiring plan, single chamber housing
18LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
6 Set up
1
5
2
3
4
6.1 General information
The figures in brackets refer to the following illustrations.
6 Set up
tion/Configuration
Func
The switching condition of the electronics can be checked with closed
housing cover (control lamp). In the basic setting, products with a
density > 0.7 g/cm³ (0.025 lbs/in³) can be detected. For products with
lower density, the switch must be set to > 0.5 g/cm³ (0.018 lbs/in³).
On the electronics module you will find the following indicating and
adjustment elements:
l Signal lamp (1)
l DIL switch for characteristics reversal - min./max. (2)
l DIL switch for sensitivity adjustment (3)
l Simulation key (4)
Note:
For test purposes, immerse the tuning fork of LEVEL SWITCH 8111
always in liquids. D o not test the function of LEVEL SWITCH 8111 with
your hand. This can damage the sensor.
2DIL switch for characteristics reversal
3DIL switch for sensitivity adjustment
4Simulation key
5EMC filter element
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output19
6 Set up
nal lamp (1)
Sig
Characte
ristics reversal
(2)
Sen
sitivity adjustment
(3)
Single-coloured control lamp for indication of the switching condition.
l red = High current ≥ 2.6 mA
l dark = Low current ≤ 0.6 mA
l red (flashing) = Failure ≤ 0.6 mA
The characteristics reversal can be carried out with the DIL switch.
You can choose between falling characteristic curve (switch position
max.) and rising characteristic curve (switch position min.). This allows
you to output the desired current.
Modes
l min. - rising characteristic curve (High current when immersed)
l max. - falling characteristics (Low current when immersed)
The NAMUR output can be switched over to falling or rising
characteristics (see also "Function chart").
For applications according to WHG, the DIL switch must be set to
position max.
With this DIL switch (3) you can set the switching point to liquids
having a density between 0.5 and 0.7 g/cm³ (0.018 and 0.025 lbs/in³).With the basic setting, liquids with a density of > 0.7 g/cm³ (0.025 lbs/
in³) can be detected. In liquids with lower density, you must set the
switch to > 0.5 g/cm³ (0.018 lbs/in³). The specifications for the position
of the switching point relate to water - density value 1 g/cm³ (0.036 lbs/
in³). In products with a different density, the switching point will shift in
the direction of the housing or tuning fork end depending on the
density and type of installation.
Note:
Keep in mind that foams with a density > 0.45 g/cm³ (0.016 lbs/in³) a re
detected by the sensor. This can cause faulty switchings particulary
when used as dry run protection system.
Sim
ulation key (4)
The simulation key is located in a recess on the upper side of the
electronics module. Push the simulation key with a suitable object
(screwdriver, pen, etc.).
When the key is pushed, a line break between sensor and processing
unit is simulated. The signal lamp on the sensor extinguishes. The
measuring system must signal a fault and take on a safe condition
when the key is pushed.
Keep in mind that downstream connected instruments will be activated
during operation. This allows you to check the correct function of the
measuring system.
6.3 Function chart
The following chart provides an overview of the switching conditions
depending on the adjusted mode and level.
20LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
6 Set up
Note:
The mode setting on the NAMUR amplifier must be selected in such a
way that the switching output takes on safe condition in case of failure
(I ≤ 0.6 mA).
LevelSignal current -
Falling characteristics max.
Falling characteristics max.
Rising characteristics min.
Rising characteristics min.
Malfunctionany≤ 0.6 mA
Sensor
≥ 2.6 mA
≤ 0.6 mA
≥ 2.6 mA
≤ 0.6 mA
Control lamp
flashes
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output21
7 Maintenance and fault rectification
7 Maintenance and fault rectification
7.1 Maintenance
If the instrument is used properly, no special maintenance is required
in normal operation.
7.2 Remove interferences
ction when malfunc-
Rea
tions occur
Fa
ilure reasons
Fa
ult rectification
Checkin
g the switching
signal
The operator of the system is responsible for taking suitable measures
to rectify faults.
LEVEL SWITCH 8111 offers maximum reliability. Nevertheless, faults
can occur during operation. These may be caused by the following, e.
g.:
l Sensor
l Process
l Voltage supply
l Signal processing
The first measure to be taken is to check the output signal. In many
cases, the causes can be determined this way and the faults rectified.
ErrorCauseRectification
L
LEVE
SWITCH 8111
signals "covered"
without being
submerged (overfill protection)
LEVEL
SWITCH 8111
signals "uncovered" when being
submerged (dry
run protection)
Operating voltage
too low
Electronics defective
Unfavourable installation location
Buildup on the vibrating element
Check operating voltage
Press the characteristic reversal
switch. If the instrument then changes
the mode, the vibrating element may
be covered with buildup or mechanically damaged. Should the switching
function in the correct mode still be
faulty, return the instrument for repair.
Push the characteristic reversal
switch. If the instrument then does not
change the mode, the electronics
module may be defective. Exchange
the electronics module.
Mount the instrument at a location in
the vessel where no dead zones or air
bubbles can form.
Check the vibrating element and the
sensor if there is buildup and remove
it.
32048-EN-120418
22LEVEL SWITCH 8111 • with NAMUR output
7 Maintenance and fault rectification
ErrorCauseRectification
Signal lamp
flashes red
Wrong characteristic selected
Error on the vibrating element
Interference on
the electronics
module
instrument defective
Set the correct characteristics on the
characteristics reversal switch (overflow protection, dry run protection).
Wiring should be carried out according to the quiescent current principle.
Check if the vibrating element is
damage or extremely corroded.
Exchanging the electronics module
Exchange the instrument or send it in
for repair
ction after fault rec-
Rea
tification
ing on the reason for the fault and the measures taken, the
Depend
steps described in chapter "Set up" may have to be carried out again.
7.3 Exchange of the electronics
If the electronics module is defective, it can be replaced by the user.
In Ex applications only an electronics module with respective Ex
approval may be used.
You find all information to the electronics exchange in t he operating
instructions of the new electronics module.
In general, all electronics modules of series SW60 can be inter-
changed. If you want to use an electronics module with a different
signal output, you carry out the complete setup. You find the
necessary, suitable operating instruction on our homepage.
Note:
Keep in mind that enamelled instrument versions need special
electronics modules. These electronics modules are called SW60E or
SW60E1.
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output23
8 Dismounting
8 Dismounting
8.1 Dismounting steps
Warning:
Before dismounting, be aware of dangerous process conditions such
as e.g. pressure in the vessel, high temperatures, corrosive or toxic
products etc.
Take note of chapters "Mounting" and "Connecting to power supply"
and carry out the listed steps in reverse order.
With Ex instruments, the housing cover may only be opened if there is
no explosive atmosphere present.
8.2 Disposal
The instrument consists of materials which can be recycled by
specialised recycling companies. We use recyclable materials and
have designed the electronics to be easily separable.
WEEE directive 2002/96/EG
This instrument is not subject to the WEEE directive 2002/96/EG and
the respective national laws. Pass the instrument directly on to a
specialised recycling company and do not use the municipal collecting
points. These may be used only for privately used products according
to the WEEE directive.
Correct disposal avoids negative effects on humans and the environment and ensures recycling of useful raw materials.
Materials: see chapter "Technical data"
If you have no way to dispose of the old instrument properly, please
contact us concerning return and disposal.
24LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
9 Supplement
9 Supplement
9.1 Technical data
General data
Material 316L corresponds to 1.4404 or 1.4435
Materials, wetted parts
- Process fitting - thread316L, Hastelloy C22 (2.4602)
- Process fitting - flange316L, 316L with Hastelloy C22 coating, steel
- Process sealKlingersil C-4400
- Tuning fork316L, Hastelloy C22 (2.4602)
Sensor length
- Length LEVEL SWITCH 8111See chapter "Dimensions"
Materials, non-wetted parts
- Housingplastic PBT (Polyester)
- Seal between housing and housing
cover
- Ground terminal316L
- Temperature adapter (optional)316L
- Gas-tight leadthrough (optional)316L/glass
Weight
- Plastic housingapprox. 850 g (30 oz)
Layer thickness
ISO 2852/316L, Clamp 1½" PN 10 DIN 32676
ISO 2852/316L, conus DN 25 PN 40, Tuchenhagen
Varivent DN 50 PN 10
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output25
9 Supplement
- Thread G¾ A, ¾ NPT75 Nm (55 lbf ft)
- Thread G1 A, 1 NPT100 Nm (73 lbf ft)
High voltage test (enamel)max. 5 KV
Gas-tight leadthrough (optional)
- Leakage rate< 10
-6
mbar l/s
- Pressure resistancePN 64
Output variable
OutputTwo-wire NAMUR output
Current consumption
- Falling characteristics≥ 2.6 mA uncovered/≤ 0.6 mA covered
- rising characteristics≤ 0.6 mA uncovered/≥ 2.6 mA covered
- Fault message≤ 0.6 mA
Necessary processing systemNAMUR processing system according to
IEC 60947-5-6 (EN 50227/DIN 19234)
Modes (NAMUR output adjustable to falling or rising characteristics)
- Min.rising characteristic curve (High current when
immersed)
- Max.falling characteristics (Low current when immersed)
Measuring accuracy
Deviation± 1 mm (0.04 in)
26LEVEL SWITCH 8111 • with NAMUR output
32048-EN-120418
Influence of the process temperature on the switching point
1
3
4
2
10 (
25
/
64
")
8
(
5
/
1
6
")
6
(
15
/
6
4
")
4
(
5
/
3
2
")
2 (
5
/
64
")
-2
(
-5
/
6
4
")
-4
(
-5
/
32
")
-6 (
-15
/
64
")
-8
(
-5
/
16
")
-10
(
-25
/
64
")
0
0°C
(32 °F)
100°C
(212 °F)
150°C
(302 °F)
200°C
(392 °F)
250°C
(482 °F)
50°C
(122 °F)
1
2
4
3
5
6
1,2
(0,043)
1
(0,036)
0,8
(0,029)
0,6
(0,022)
1,4
(0,051)
1,6
(0,058)
1,8
(0,065)
2
(0,072)
2,2
(0,079)
2,4
(0,087)
10 (
25
/
64
")
8
(
5
/
1
6
")
6
(
15
/
64
")
4 (
5
/
3
2
")
2
(
5
/
64
")
-2
(
-5
/
64
")
-4
(
-5
/
3
2
")
-6
(
-15
/
64
")
-8
(
-5
/
16
")
-10
(
-25
/
64
")
0
Fig. 20: Influence of the process temperature on the switching point
1Shifting of the switching point in mm (in)
2Process temperature in °C (°F)
3Switching point at reference conditions (notch)
4Tuning fork
Influence of the product density on the switching point
9 Supplement
Fig. 21: Influence of the product density on the switching point
1Shifting of the switching point in mm (in)
2Product density in g/cm³ (lb/in³)
3Switch position 0.5 g/cm³ (0.018 lb/in³)
4Switch position 0.7 g/cm³ (0.025 lb/in³)
5Switching point at reference conditions (notch)
6Tuning fork
32048-EN-120418
LEVEL SWITCH 8111 • with NAMUR output27
1
2
3
4
12
(174,1)
38
(551,1)
25
(362,6)
51
(739,7)
64
(928,2)
10 (
25
/
64
")
8
(
5
/
16
")
6
(
15
/
6
4
")
4 (
5
/
3
2
")
2
(
5
/
64
")
-2
(
-5
/
64
")
-4
(
-5
/
3
2
")
-6
(
-15
/
64
")
-8
(
-5
/
16
")
-10
(
-25
/
64
")
0
9 Supplement
Influence of the process pressure to the switching point
Fig. 22: Influence of the process pressure to the switching point
1Shifting of the switching point in mm (in)
2Process pressure in bar (psig)
3Switching point at reference conditions (notch)
4Tuning fork
Repeatability0.1 mm (0.004 in)
Hysteresisapprox. 2 mm (0.08 in) with vertical installation
Switching delayapprox. 500 ms (on/off)
Frequencyapprox. 1200 Hz
Ambient conditions
Ambient temperature on the housing-40 … +70 °C (-40 … +158 °F)
Storage and transport temperature-40 … +80 °C (-40 … +176 °F)
Process conditions
Measured variableLimit level of liquids
Process pressure-1 … 64 bar/-100 … 6400 kPa (-14.5 … 928 psig)
Process temperature (thread or flange tem-
perature)
- LEVEL SWITCH 8111 of 316L/Hastelloy
C22 (2.4602)
Process temperature (thread or flange tem-
perature) with temperature adapter (option)
- LEVEL SWITCH 8111 of 316L/Hastelloy
C22 (2.4602)
28LEVEL SWITCH 8111 • with NAMUR output
depending on the process fitting, e.g. flange (see
following diagrams)