KROHNE OPTISWITCH 5100 C User manual

OPTISWITCH 5100 C, 5150 C Handbook
Vibrating Level Switch
Relay (DPDT)

2
Contents
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
Contents
1 About this document
1.1 Function ........................................................................................................................... 3
1.2 Target group ..................................................................................................................... 3
1.3 Symbols used................................................................................................................... 3
2 For your safety
2.1 Authorised personnel ....................................................................................................... 4
2.2 Appropriate use................................................................................................................ 4
2.3 Warning about incorrect use............................................................................................. 4
2.4 General safety instructions............................................................................................... 4
2.5 Safety label on the instrument .......................................................................................... 5
2.6 EU conformity................................................................................................................... 5
2.7 SIL conformity .................................................................................................................. 5
2.8 Safety instructions for Ex areas........................................................................................ 5
3 Product description
3.1 Conguration.................................................................................................................... 6
3.2 Principle of operation........................................................................................................ 6
3.3 Adjustment ....................................................................................................................... 7
3.4 Storage and transport....................................................................................................... 8
3.5 Accessories...................................................................................................................... 8
4 Mounting
4.1 General instructions ....................................................................................................... 10
4.2 Mounting instructions ..................................................................................................... 13
5 Connecting to power supply
5.1 Preparing the connection ............................................................................................... 15
5.2 Connection procedure.................................................................................................... 15
5.3 Wiring plan, single chamber housing.............................................................................. 16
6 Setup
6.1 General information........................................................................................................ 18
6.2 Adjustment elements...................................................................................................... 18
6.3 Function table................................................................................................................. 19
7 Maintenanceandfaultrectication
7.1 Maintenance .................................................................................................................. 21
7.2 Rectify faults................................................................................................................... 21
7.3 Exchanging the electronics ............................................................................................ 22
7.4 Instrument repair ............................................................................................................ 22
8 Dismount
8.1 Dismounting steps.......................................................................................................... 23
8.2 Disposal ......................................................................................................................... 23
9 Supplement
9.1 Technical data ................................................................................................................ 24
9.2 Dimensions .................................................................................................................... 31
9.3 Trademark ...................................................................................................................... 34
Editing status: 2016-11-18

3
1 About this document
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
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 instruc-
tionsformaintenanceandfaultrectication.Pleasereadthisinforma-
tion 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 specialist
personnel.The contents of this manual should be made available to
these personnel and put into practice by them.
1.3 Symbols 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.
SIL applications
This symbol indicates instructions for functional safety which must be
taken into account particularly for safety-relevant applications.
• List
The dot set in front indicates a list with no implied sequence.
→ Action
This arrow indicates a single action.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.

4
2 For your safety
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
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 OPTISWITCH 5100 C, 5150 C is a sensor for point level detec-
tion.
Youcannddetailedinformationabouttheareaofapplicationin
chapter "Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecications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. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.
2.3 Warning about incorrect use
Inappropriate or incorrect use of the instrument can give rise to
application-specichazards,e.g.vesseloverllordamagetosystem
components through incorrect mounting or adjustment.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and guidelines.The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsible
for the 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 regula-
tions.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
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. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.
The safety approval markings and safety tips on the device must also
be observed.

5
2 For your safety
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
2.5 Safety label on the instrument
The safety approval markings and safety tips on the device must be
observed.
2.6 EU conformity
ThedevicefullsthelegalrequirementsoftheapplicableEUguide-
lines.ByaxingtheCEmarking,weconrmsuccessfultestingofthe
product.
2.7 SIL conformity
OPTISWITCH5100C,5150Cfulllstherequirementsonfunctional
safetyaccordingtoIEC61508resp.IEC61511.Youcanndfurther
information in the Safety Manual "OPTISWITCH 5XXX".
2.8 Safety instructions for Ex areas
PleasenotetheEx-specicsafetyinformationforinstallationandop-
eration in Ex areas. These safety instructions are part of the operating
instructions manual and come with the Ex-approved instruments.

6
3 Product description
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• OPTISWITCH 5100 C, 5150 C point level switch
• Documentation
– This operating instructions manual
– Safety Manual "Functional safety (SIL)" (optional)
– Ex-specic"Safety instructions" (with Ex versions)
– Ifnecessary,furthercerticates
The OPTISWITCH 5100 C, 5150 C consists of the components:
• Housing lid
• Housing with electronics
• Processttingwithtuningfork
1
2
3
Fig. 1: OPTISWITCH 5100 C, 5150 C
1 Housing lid
2 Housing with electronics
3 Processtting
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
• Article number
• Serial number
• Technical data
• Article numbers, documentation
• SILidentication(withSILratingexworks)
Inadditiontothetypelabeloutsideontheinstrument,youndthe
serial number also inside the instrument.
3.2 Principle of operation
OPTISWITCH 5100 C, 5150 C is a point level sensor with tuning fork
for point level detection.
It is designed for industrial use in all areas of process technology and
can be used in liquids.
Scope of delivery
Constituent parts
Type label
Application area

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3 Product description
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
Typicalapplicationsareoverllanddryrunprotection.Withitstuning
fork of only 40 mm length, OPTISWITCH 5100 C, 5150 C can also
be 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, OPTISWITCH 5100 C, 5150 C is virtually unaf-
fected by the chemical and physical properties of the liquid.
Itfunctionsevenunderdicultconditionssuchasturbulence,airbub-
bles, foam generation, buildup, strong external vibration or changing
products.
Function monitoring
The electronics module of OPTISWITCH 5100 C, 5150 C continu-
ously monitors the following criteria via frequency evaluation:
• Strong corrosion or damage on the tuning fork
• Loss of vibration
• Linebreaktothepiezodrive
If a malfunction is detected or in case of power failure, the electron-
icstakesonadenedswitchingcondition,i.e.therelaydeenergises
(safe state).
Thetuningforkispiezoelectricallyenergisedandvibratesatits
mechanicalresonancefrequencyofapprox.1200Hz.Thepiezosare
xed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.
OPTISWITCH 5100 C, 5150 C is a compact instrument, i.e. it can be
operated without external evaluation system.The integrated electron-
ics 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speciedinchapter"Technical data".
3.3 Adjustment
The switching condition of OPTISWITCH 5100 C, 5150 C with plastic
housing 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 are to be measured.
Ontheelectronicsmoduleyouwillndthefollowingdisplayand
adjustment elements:
• Signal lamp for indication of the switching condition (green/red)
• DIL switch for sensitivity adjustment
• Mode adjustment for selection of the switching condition (A/B)
Functional principle
Voltage supply

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3 Product description
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
3.4 Storage and transport
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable carton material.The sensing element is additional-
ly protected with a cardboard cover. For special versions, PE foam or
PE foil is also used. Please dispose of the packaging material through
specialised recycling companies.
Transport must be carried out in due 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 con-
cealed 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:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter "Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
3.5 Accessories
Screwedangesareavailableindierentversionsaccordingtothe
following standards: DIN 2501, EN 1092-1, BS 10, ASME B 16.5,
JIS B 2210-1984, GOST 12821-80.
Youcanndadditionalinformationinthesupplementaryinstructions
manual "Flanges according to DIN-EN-ASME-JIS".
The electronics module SW E60 is a replacement part for level switch-
es OPTISWITCH 5100 C, 5150 C.
Youcanndinformationintheoperatinginstructionsmanualofthe
electronics module.
For connecting the sensors with a separator to voltage supply or sig-
nal processing, the sensors are also available with plug connectors.
The following plug connectors are available:
• M12 x 1
• ISO 4400
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
Flanges
Electronics module
Plug connector

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3 Product description
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
• Harting HAN 7D
• Harting HAN 8D
• Amphenol-Tuchel

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4 Mounting
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
4 Mounting
4.1 General instructions
Make sure that all parts of the instrument coming in direct contact
with the process, especially the sensor element, process seal and
processtting,aresuitablefortheexistingprocessconditions,such
as process pressure, process temperature as well as the chemical
properties of the medium.
Youcanndthespecicationsinchapter"Technical data" and on the
nameplate.
In general, OPTISWITCH 5100 C, 5150 C 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 applies
to water in conjunction with the basic setting of the density switch
≥0.7g/cm³(0.025lbs/in³).WhenmountingOPTISWITCH5100C,
5150 C, make sure that this marking is at the height of the requested
switching point. Keep in mind that the switching point of the instru-
ment will shift if the medium has a density other than water - water is
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.
Keepinmindthatfoamswithadensity≥0.45g/cm³(0.016lbs/in³)
are detected by the sensor. This can lead to erroneous switchings,
particulary when the sensor is used for dry run protection.
Suitability for the process
conditions
Switching point

11
4 Mounting
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
2
3
14
Fig. 2: Vertical mounting
1 Switching point approx. 13 mm (0.51 in)
2 Switching point with lower density
3 Switching point with higher density
4 Switching point approx. 27 mm (1.06 in)
1
Fig. 3: Horizontal mounting
1 Switching point
1
2
Fig. 4: Horizontal installation (recommended mounting position, particularly for
adhesive products)
1 Switching point
2 Marking with screwed version, facing up
Inthecaseofangeversions,theforkisalignedasfollows.

12
4 Mounting
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
1
Fig.5:Forkpositionwithangeversions
1 Markingwithangeversion,facingup
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o.Thisap-
plies 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.
Fig. 6: Measures against moisture ingress
Caution:
Do not hold OPTISWITCH 5100 C, 5150 C on the tuning fork. Particu-
larlywithange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tting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speciedinchapter"Technical
data" or on the type label of the sensor.
Moisture
Transport
Pressure/Vacuum

13
4 Mounting
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
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.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
4.2 Mounting instructions
OPTISWITCH5100C,5150Chasadenedthreadstartingpoint.
This means that every OPTISWITCH 5100 C, 5150 C is in the same
fork position after being screwed in. Remove therefore the supplied
seal from the thread of OPTISWITCH 5100 C, 5150 C.This seal is not
required when using a welded socket with O-ring in front.
Keep in mind that this welded socket is not suitable for coated instru-
ment versions.
Screw OPTISWITCH 5100 C, 5150 C 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 OPTISWITCH 5100 C, 5150 C 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ow.
1
Fig. 7: Marking on the welded socket
1 Marking
Handling
Cable entries - NPT
thread
Cable glands
Welded socket

14
4 Mounting
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
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nd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sucientto
reach the recommended installation position.
Inthecaseofangeversions,theforkisalignedwiththeangeholes.
When used in adhesive and viscous products, the tuning fork should
protrude into the vessel to avoid buildup. For that reason, sockets
forangesandmountingbossesshouldbeavoidedwhenmounting
horizontally.
IfOPTISWITCH5100C,5150Cismountedinthellingstream,un-
wanted false measurement signals can be generated. For this reason,
mount OPTISWITCH 5100 C, 5150 C at a position in the vessel where
nodisturbances,e.g.fromllingopenings,agitators,etc.,canoccur.
To make sure the tuning fork of OPTISWITCH 5100 C, 5150 C gener-
atesaslittleresistanceaspossibletoproductow,mountthesensor
so that the surfaces are parallel to the product movement.
Instruments with enamel coating should be treated very carefully
and shocks should be avoided. Unpack OPTISWITCH 5100 C, 5150
C directly before installation. Insert OPTISWITCH 5100 C, 5150 C
carefully into the vessel opening and avoid touching any sharp vessel
parts.
The second seal of the gas-tight leadthrough (option) prevents an
uncontrolled leakage of the medium.The service life of the gas-tight
leadthrough depends on the chemical resistance of the materials.
See "Technical data".
Caution:
If it is determined (e.g. via an error message from OPTISWITCH 5100
C, 5150 C) that medium has already penetrated into the vibrating ele-
ment, the instrument must be exchanged immediately.
Adhesive products
Inowingmedium
Productow
Enamel coating
Gas-tight leadthrough

15
5 Connecting to power supply
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
Warning:
Connect only in the complete absence of line voltage.
• The electrical connection must only be carried out by trained
personnel authorised by the plant operator.
• Alwaysswitchopowersupply,beforeconnectingordisconnect-
ing the instrument.
Note:
Install a separating facility for the instrument which is easy to access.
The separating facility must be marked for the instrument (IEC/
EN 61010).
Inhazardousareasyoumusttakenoteoftherespectiveregulations,
conformityandtypeapprovalcerticatesofthesensorsandpower
supply units.
Connect the voltage supply according to the connection diagrams.
The electronics module with relay output is designed in protection
class I.To maintain this protection class, it is absolutely necessary
that the earth conductor be connected to the inner earth conductor
terminal. Keep the general installation regulations in mind. Take note
ofthecorrespondinginstallationregulationsforhazardousareaswith
Ex applications.
Thedataforpowersupplyarespeciedinchapter"Technical data".
The instrument is connected with standard three-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 outer diameter of
5…9mm(0.2…0.35in)ensuresthesealeectofthecablegland.
Ifyouareusingcablewithadierentdiameterorcross-section,
exchange the seal or use a suitable cable gland.
Inhazardousareas,useonlyapprovedcableconnectionsforOPTIS-
WITCH 5100 C, 5150 C.
Take note of the corresponding installation regulations for Ex applica-
tions.
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:
Note safety instructions
Take note of safety
instructions for Ex
applications
Voltage supply
Connection cable
Connection cable
for Ex applications

16
5 Connecting to power supply
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
1. Unscrew the housing lid
2. Loosen compression nut of the cable gland and remove blind
plug
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
5. Open the terminals with a screwdriver
6. Insert the wire ends into the open terminals according to the wir-
ing 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 gland. The seal
ring must completely encircle the cable
10. Screw the housing lid back on
Theelectricalconnectionisnished.
5.3 Wiring plan, single chamber housing
The following illustrations apply to the non-Ex as well as to the Ex-d
version.
5
5
55
1 2
4
3
Fig. 8: Material versions, single chamber housing
1 Plastic (not with Ex d)
2 Aluminium
3 Stainless steel, precision casting
4 Stainless steel, electropolished (not with Ex d)
5 Filter element for pressure compensation (not with Ex d)
Housing overview

17
5 Connecting to power supply
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
3
5
1
2
4
20-250V AC
20-72V DC
A
B
LN
12 345678
0,5 g / cm3
0,7 g / cm3
3 4 5 6 7 8
+
SW E60R
Fig. 9: Electronics and terminal compartment, single chamber housing
1 Control lamp
2 DIL switch for mode adjustment
3 DIL switch for switching point adaptation
4 Ground terminal
5 Connection terminals
We recommend connecting OPTISWITCH 5100 C, 5150 C in such a
way that the switching circuit is open when there is a level signal, line
break or failure (safe state).
Information:
The relays are always shown in non-operative condition.
1
2
3
123456
+
L1 - N
78
Fig. 10: Wiring plan, single chamber housing
1 Relay output
2 Relay output
3 Voltage supply
Electronics and terminal
compartment
Wiring plan

18
6 Setup
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
6 Setup
6.1 General information
Theguresinbracketsrefertothefollowingillustrations.
With plastic housings, the switching condition of the electronics can
be checked when the housing cover is closed (control lamp).With 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ndthefollowingdisplayand
adjustment elements:
• Signal lamp (1)
• DIL switch for mode adjustment - A/B (2)
• DIL switch for sensitivity adjustment (3)
Note:
Always immerse the tuning fork of OPTISWITCH 5100 C, 5150 C in
a liquid to test its function. Do not test the function of OPTISWITCH
5100 C, 5150 C with your hand. This can damage the sensor.
6.2 Adjustment elements
12345678
1
2
3
Fig. 11: Oscillator SWE60R - Relay output
1 Control lamp (LED)
2 DIL switch for mode adjustment
3 DIL switch for sensitivity adjustment
Control lamp for indication of the switching status
• green=relayenergized
• red=relaydeenergized
• red(ashing)=failure
With the mode adjustment (A/B) you can change the switching
condition of the relay.You can set the required mode according to the
Function/Conguration
Signal lamp (1)
Mode adjustment (2)

19
6 Setup
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
"Function table"(A-max.detectionoroverowprotection,B-min.
detection or dry run protection).
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specicationsforthe
positionoftheswitchingpointrelatetowater-densityvalue1g/cm³
(0.036lbs/in³).Inproductswithadierent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)
are detected by the sensor. This can lead to erroneous switchings,
particulary when the sensor is used for dry run protection.
6.3 Function table
The following table provides an overview of the switching conditions
depending on the set mode and the level.
Level Switching status Control lamp
Mode A
Overowprotec-
tion 53 4
(8)(6) (7)
Relayenergized Green
Mode A
Overowprotec-
tion 53 4
(8)(6) (7)
Relay deener-
gized
Red
Mode B
Dry run protection 53 4
(8)(6) (7)
Relayenergized Green
Mode B
Dry run protection 53 4
(8)(6) (7)
Relay deener-
gized
Red
Failure of the sup-
ply voltage
(mode A/B)
any
53 4
(8)(6) (7)
Relay deener-
gized
O
Sensitivity adjustment (3)

20
6 Setup
OPTISWITCH 5100 C, 5150 C • Relay (DPDT)
30426-EN-161125
Level Switching status Control lamp
Fault any
53 4
(8)(6) (7)
Relay deener-
gized
ashesred