ANDERSON-NEGELE ILM-4 User manual

Operating Manual
Inductive Conductivity Meter
ILM-4 / ILM-4R
SENSORS FOR FOOD AND LIFESCIENCE.
ILM-4 / ILM-4R
30012 / 3.4 / 2019-12-16 / AR / EU

Operating Manual ILM-4 2
Table of contents
Table of contents...............................................................................................2
1Application / Intended use ......................................................................3
2Conformity with standards......................................................................3
3Safety instructions..................................................................................3
4Special features / advantages..................................................................4
5Options / Accessories..............................................................................4
6Installation and Connection ....................................................................4
6.1 Mechanical installation..............................................................................................4
6.2 Requirements for hygienic installation.................................................................5
6.3 Settings using the MPI-200 programming adapter ......................................... 10
6.4 Settings using the User Interface......................................................................... 12
6.4.1 Screen display........................................................................................................... 14
6.4.2 LED Configuration.................................................................................................... 14
7Settings of Sensor .................................................................................15
7.1.1 Default Settings for LED......................................................................................... 15
7.1.2 Default Settings of mA Output .............................................................................15
7.1.3 Default settings of Ranges.....................................................................................15
7.2 Examples of sensor settings.................................................................................. 16
7.2.1 Setting of customer-specific concentration curve via MPI-200 software . 16
7.2.2 Example for setting conductivity 1 using the display.....................................17
8Installation of the „Large User Interface“ (LUI)......................................18
8.1 Retrofitting the display if a display was not yet installed............................. 18
8.2 Retrofitting the display if a small display (SUI) was already installed .......19
9Dimensions...........................................................................................20
10 Electrical Connection Analog Signal Modules........................................21
11 Electrical Connection Digital Signal Modules ........................................24
12 ILM-4 IO-Link Device Identity ................................................................26
13 ILM-4 IO-Link User Interface..................................................................27
14 ILM-4 IO-Link Process Data Description .................................................28
15 Repair and maintenance........................................................................31
16 Technical data.......................................................................................31

Operating Manual ILM-4 3
1Application / Intended use
•Inductive measurement of specific conductivity and concentration of fluid media in the
range of 0…1000 mS / cm
•For use in hygienic applications of the food, beverage, and pharmaceutical industries
•Not suitable for use in explosive atmospheres
•Not suitable for safety-related unit parts (SIL)
2Conformity with standards
The basic safety and health requirements are met through fulfillment of:
•2014/30/EU Electromagnetic Compatibility
•1935/2004/EU Consumer Goods Ordinance
•Directive (EU) 10/2011 (Articles in Contact with Food)
•EN 61000-6-2:2005 (Interference Immunity)
•EN 61000-6-4:2007 + A1:2011 (Interference Emissions)
3Safety instructions
These safety instructions must be followed to
•Avoid endangering persons and the environment.
•Avoid damage to the sensors.
•Prevent faulty batches during production.
The electrical connections may only be performed by persons with the necessary technical skills
(e.g. certified electricians or persons with technical training in electrics) and by persons with the
necessary authorization from the operator.
The power supply and the control circuit inputs and outputs must be professionally wired. The
current state-of-the-art of electrical connections must be adhered to. See also section 8 "Wiring
diagram".
The following details must be noted in particular:
•Safety instructions
•Electrical connection data
1. All persons involved with the setup, commissioning, operation, service, and maintenance
of the sensor must be suitably qualified.
2. This operating manual must be followed closely. The operator must ensure that the per-
sonnel has read and fully understood the operating manual.
3. All work must be performed with utmost care and may only be executed by authorized and
trained personnel. The applicable national regulations regarding opening and repairing of
devices must be complied with.
4. We recommend storing the operating manual near the measuring device in an easily ac-
cessible location.
5. The sensor must be de-energized prior to alterations and maintenance.
6. The working area of the operator must offer enough space to minimize the risk of injury.
7. The technical data specified in the operating manual and on the type label must be noted.
Warranty coverage shall not be granted for any damage that can be attributed to improper execu-
tion of work on the device.

Operating Manual ILM-4 4
4Special features / advantages
•The sensor structure is based on a modular device platform which can be tailored to re-
quirements and is easy to exchange if faulty
•Wear-free, inductive measurement procedure
•In contrast to conductive measurement procedures, there are no problems due to elec-
trode deterioration or polarization.
•Hygienic design with Negele weld-in sleeve
•Individual setting/programming via PC or User Interface
•Two configurable LEDs on the display unit
5Options / Accessories
•User Interface with small or large display (retrofittable)
•Programming adapter MPI-200 (PC-based) or IO-Link
•Tool for detaching the signal module
•Pre-assembled PVC cables
6Installation and Connection
6.1 Mechanical installation
Mechanical connection / installation notes
•The device must be installed such that the submersible body is fully surrounded by
the medium and no air bubbles can form in the sensor area. It therefore is advisable
to install the device in rising pipes.
•The device must be aligned such that the lettering "FLOW" is at the bottom of the
device in the direction of flow.
•Very strong vibrations can lead to false measurements (e.g. if installed near a
pump).
•Use the Negele CLEANadapt system to ensure that the measuring point functions
properly.
•When installing the device, adhere to the maximum tightening torque of 20 Nm.
•To correctly install CLEANadapt weld-in sleeves, use a suitable welding mandrel.
Follow the weld-in and installation instructions in the CLEANadapt product infor-
mation.

Operating Manual ILM-4 5
6.2 Requirements for hygienic installation
Recommended dimensions for hygienic installation using Tri-Clamp
Tri-Clamp: T < (D-d)
Recommended mounting positions
ILM-4 in vertical pipe
ILM-4 in horizontal pipe
Conditions for hygienic installation according 3A and EHEDG
•The ILM-4 / ILM-4R is designed for CIP/SIP cleaning. The sensor can withstand a
maximum of 150 °C / 60 min.
•The mounting position must guarantee self-draining properties.
•The mounting position and gasket need to follow the actual 3A or EHEDG stand-
ards and guidelines.
•When using Tri-Clamp process connections, observe the requirements of the cur-
rent 3A and EHEDG regulations regarding installation position, process connec-
tions and approved seals.

Operating Manual ILM-4 6
Not permitted mounting positions using Tri-Clamp
Installation from top or from bottom should be avoided.
This can lead to incorrect measurement due to accumulation of air or deposits.
Disregarded flow direction
The device should be aligned so that the "FLOW" label on the bottom of the de-
vice in the direction of flow.
The ILM-4 inductive conductivity meter is set to operate without requiring special adapta-
tions. In isolated instances, some parameters may need to be adjusted. The parameterization
may be changed using the PC-based MPI-200 programming adapter or the User Interface di-
rectly on the sensor. This can be performed either directly on location or in the office in a dry
simulation.

Operating Manual ILM-4 7
The parameter list accompanying the sensor contains the sensor settings for analog output 1 (ter-
minals 4 and 5) under X45 and for analog output 2 (terminals 6 and 7) under X67.
The sensor can be parameterized either via the PC-based MPI-200 programming adapter, IO-Link
or directly on the sensor using the User Interface with Display
The ILM-4 inductive conductivity meter features a modular design with a “tree structure”, which
can be tailored to meet requirements and can be easily exchanged in the event of a fault.
This tree structure is also used by the MPI-200 programming adapter software for the PC and the
User Interface in the sensor. The software is subdivided into Display, Electronic (signal interface)
and Sensor (conductivity measurement).
Sensor (conductivity measurement): One or two analog outputs of the sensor for conductivity, con-
centration and temperature can be freely configured.
Conductivity: Two different conductivities can be set here, independently of one another. The upper
range limit can be freely selected. In addition, the customer can freely adjust temperature compen-
sation and damping.
Concentration: Two predefined ranges for common CIP media (NaOH or HNO3) are available for se-
lection. In addition, there is the possibility of entering up to 8 customized media specific points
(each for conductivity and concentration). A customer defined range is entered by specifying at least
2 points with values > 0. This customized entry of support points is only possible in the “Setup”
level or higher. The temperature compensation, damping and upper range limit can also be set.
Temperature: Output of the medium temperature measured at the tip of the PEEK part on the sensor.
The temperature unit and response time can be adjusted here.
Signal module
Sensor
Display
Cap

Operating Manual ILM-4 8
The table below shows possible sensor settings and corresponding ID number.
Parameter
ID Number
Adjustable settings
Sensor
Sensor Settings
Temperature Compensation Unit
013021
%/K, %/°F
Conductivity 1
Temperature Compensation 1
013031
0…100 %/K
Damping Conductivity 1
013041
inactive, 2.5 s, 5 s, 10 s, 20 s
Upper Range Value of Conductivity 1
013091
0.5…1000 mS/cm
(in increments of 0.5)
Concentration
Temperature Compensation
013032
0…100 %/K
Damping Concentration
013042
inactive, 2.5, 5 , 10 , 20 s
Media
013061
NaOH 0…10%, HNO3 0…20%
or customer-specific concen-
tration
Upper Range Value of Concentration
013092
1…100 %
(+) Customer-specific points,
X-Conductivity, Y-Concentration
Up to 8 support points for con-
ductivity and concentration
Conductivity 2
Temperature Compensation 2
013033
0…100 %/K
Damping Conductivity 2
013043
inactive, 2.5, 5, 10, 20 s
Upper Range Value of Conductivity 2
013093
0.5…1000 mS/cm
(in increments of 0.5)
Temperature
Unit Temperature
013144
°C or °F
Response Time
013145
Normal or rapid
Analog Output (X45a)
Signal selection
330031
Conductivity 1, Concentration,
Conductivity 2, Temperature
4mA Setpoint in % of URV
330111
-50.0 … 150.0 %
20mA Setpoint in % of URV
330191
-50.0 … 150.0 %
Underrange Limit
330141
2.40, 3.20, 3.40, 3.60, 3.80,
3.95, 4.00 mA
Overrange Limit
330211
20.00, 20.05, 20.50, 21.00,
21.20, 21.40, 21.60, 21.80,
22.00 mA
Warning-Signal: No Media
330121
2.40, 3.20, 3.40, 3.60, 3.80,
3.95, 4.00 mA
Warning-Signal: Outside of Specifica-
tion
330221
2.40, 3.20, 3.40, 3.60, 3.80,
3.95, 4.00 mA
Error-Signal: Global Failure
330131
20.00, 20.05, 20.50, 21.00,
21.20, 21.40, 21.60, 21.80,
22.00 mA
Digital Input (x3)
Active State
330821
active high, active low

Operating Manual ILM-4 9
The table below shows possible display settings and corresponding ID number.
Parameter
ID Number
Adjustable settings
Display
Settings Display
Language
451010
English, German
LED 1 (left)
Signal Selection
330034
Conductivity 1, Concentration,
Conductivity 2, Temperature
Warning-Signal: No Media
331191
No effect, Fast Blinking, Slow
blinking, On, Off
Warning-Signal:
Outside of Specification
331201
No effect, Fast Blinking, Slow
blinking, On, Off
Error-Signal: Global Failure
331231
No effect, Fast Blinking, Slow
blinking, On, Off
LED 2 (right)
Signal Selection
330035
Conductivity 1, Concentration,
Conductivity 2, Temperature
Warning-Signal: No Media
331192
No effect, Fast Blinking, Slow
blinking, On, Off
Warning-Signal:
Outside of Specification
331202
No effect, Fast Blinking, Slow
blinking, On, Off
Error-Signal: Global Failure
331232
No effect, Fast Blinking, Slow
blinking, On, Off
Signaling interface:
•Signal selection for the 4…20 mA signal: Selection between conductivity 1 or 2, concentration
and temperature
•Set value for 4 or 20 mA signal: By default, the lower range limit is used for the 4 mA signal
and the upper range limit for the 20 mA signal. This can be adjusted as necessary.
•"No Media" warning signal: Current loop signal when the sensor is not immersed in a medium
→dry running.
•"Outside Spec." warning signal: Current loop signal if an operating state is outside of the spec-
ified range. The measurement accuracy can no longer be guaranteed.
•"Global Failure" error signal: Current loop signal if a malfunction occurs, for example if the
device fails.
•Signal limit for under range and over range: Lower or upper limit of the current loop signal
that is still valid and linear when output below 4 mA or above 20 mA.
•"Underflow/overflow" error signal: Current loop signal is below or above the under range or
over range limit.
•Signaling Simulation: Simulates the current loop signal, where the entered parameter value
briefly replaces the source value.
•LED configuration: These two LEDs can be configured as required.
A list of the parameters set in the conductivity sensor is included with the delivery. These param-
eter values, as well as those changed by the users themselves, can be printed out using the MPI-
200 programming adapter and the PC software or using IO-Link.
When making the settings, note the help texts in the MPI software for each parameter. They
provide useful information on changing the selected parameter.

Operating Manual ILM-4 10
6.3 Settings using the MPI-200 programming adapter
The MPI-200 programming adapter is connected to the ILM-4 conductivity meter via the external
MPI-200-F adapter. It must be ensured that the ILM-4 conductivity meter is permanently connected
to the supply voltage while the parameters are being set.
After the sensor is connected to the PC and the user software is opened, the following window ap-
pears:
1. Information on the current process value
2. Buttons for changing the parameter setting
3. Information on the current source value
4. Adjustable PC parameters
5. Adjustable sensor parameters
Clicking on the + in the menu opens a submenu
in which parameters can be adjusted.
Note:
For further settings, please see also the description in the MPI-200 product information.
5.
Connection plug for the MPI-200-F
adapter as an intermediate plug be-
tween the ILM-4 electronics and the
MPI-200 connection 3 (see the next fig-
ure).
3
1: not needed
2: USB port for connecting to a
PC
3: Connection cable to adapter
for ILM-4
Connection of the MPI-200 programming
adapter
1
2
3
1.
2.
3.
4.

Operating Manual ILM-4 11
To set or change parameters directly in the sensor (see section 6.2 "Settings using the Simple User
Interface"), you need the ID codes contained in the table below. This table only lists the most im-
portant ID codes.
Further ID codes can be found in the user software. To view these, right-click on "Info" by the pa-
rameter name. An info box appears with the respective ID (see graphic below):
Because the search number must have 6 digits, an additional digit is always added in front of the
five-digit ID (30034 in the graphic above). This digit depends on the node as follows:
4for changes to the display
3for changes to the signal module (signal interface)
0for changes to the sensor (conductivity measurement)
Because the signal selection is in the single interface, the ID code for the "Signal selection" exam-
ple above is: 330034.
A list of all ID codes can be printed out via the PC user interface. To do so, click on File →Parameter
Data →Print to open the corresponding window and print out the complete list of ID codes.

Operating Manual ILM-4 12
6.4 Settings using the User Interface
The software structure of the User Interface is like the structure of the PC version.
The system is operated using two control buttons to the left and right or below the display.
These two buttons can be used to navigate through the tree structure of the User Interface to
change parameters. The button functions are as follows:
Note:
Explanation for the programming example shown on the next page.
1) Briefly press the right button.
2) Press and hold the right button, select the required mode (e.g. Setup) and scroll through the
menu using the right/left buttons and confirm the selection by pressing and holding the right
button.
3) Press and hold the right button and then enter the ID number from right to left. Proceed as
follows:
a.) Select the desired position (navigation with the right/left buttons, press the left button:
Change the position to the left, press the right button, change the position to the right).
b.) At the desired position, press and hold the right button until the field becomes gray. Then
enter the numerical value using the right / left buttons and confirm by pressing and hold-
ing the right button until the gray area disappears. Then enter the next digit.
c.) After all digits have been entered, move all the way to the left with the left button until the
field become gray.
Then press and hold the right button. The system jumps to the selected parameter, which
can now be entered or changed in the same manner. Start by pressing and holding the
right button.
For some system-related parameters, you are asked to confirm that you really wish to
make the change. Do this by pressing the left or right button.
▪Press the right button to change the parameter or save the change.
▪Press the left button to leave the setting without making a change.

Operating Manual ILM-4 13
Menu Structure
R : Right button
R l. : Right button (long)
L : Left button
L l. : Left button (long)
Calibr. Calibr. Calibr. Calibr.
Display
A-Out X45b
Conducty 2
X45a 20mA
X45b 4mA
X45b 20mA
ID-Search
Setup
Sensor
Display
ID Search
ID Search
ID Search
Unit TComp
Sensor
Menu
QuickSetup
QuickSetup
QuickSetup
LED2
Set Displ.
LED1
Sensor
Quick Setup
Setup
TempComp 1
Display
TempComp C
Range Cd C
Range Cd 2
Unit Temp.
Language
A-Out X67
Media
Menu
Menu
ID Search
QuickSetup
Menu
TempComp 2
Range Cd 1
ILM-4
000000
Setup
Setup
Setup
Setup
Menu
QuickSetup
Setup
ID Search
Calibr.
TempCompC
TempComp2
Range Cd 1
Media
Range Cd C
Calibration
Unit Tcomp
TempComp1
Range Cd 2
Unit Temp.
X45a 4mA
D-In X3
X67 4mA
X67 20mA
Temperatur
A-Out X45a
Set Sensor
Conducty 1
Concentr C
Relay X67
R
Rl.
Rl.
R
R l.
R
R
Rl.
Rl.
R
R l.

Operating Manual ILM-4 14
6.4.1 Screen display
After the sensor parameters have been adapted/changed, or after the sensor is switched on and
no change is made, the sensor shows the current measurement value. By pressing the right button,
different measurement values will be shown. After pressing the left button long, the default meas-
urement will be displayed.
To leave the display mode and create settings on the sensor, press one of the two buttons on the
left and right next to the display. The sensor then displays the start page, from where the settings
can be created.
6.4.2 LED Configuration
The display unit features two LEDs that can be individually configured. These can be used to visu-
ally indicate faults directly on-site. The LED to the left of the display is LED 1 while the one to the
right is LED 2.
The following options can be selected when setting the LEDs:
•Signal Selection: The following signals can be selected: conductivity 1 and 2, temperature
and concentration.
•Output function, direction of action, switch point entry method, switch point, hysteresis
•Switch ON Delay, Switch OFF Delay: The digital output is switched on or off with the delay
set here. Values can be set between 0...30 s.
•Warn-S: no Media, Warn-S: Outside Spec., Err-Sig: Underflow, Err-Sig: Overflow, Err-Sig:
Global Failure: The effect of each parameter on the LED display can be set. The following
can be selected: "No Effect on Output", Output Fast Blinking" (0.4 s interval), "Output Slowly
Blinking" (1 s interval), "Output ON" (LED on continuously) and "Output OFF". "Output" refers
to the LED here.
•Signaling Simulation: the entered parameter value briefly replaces the source value. The
following situations can be simulated: "Output OFF", "Output ON", "Output Slowly Blinking"
and "Output flashes rapidly". "Output" refers to the LED here.
Module
Parameter name
Measured value cur-
rently being output
at the current output
ID code
Value currently set for this parameter

Operating Manual ILM-4 15
7Settings of Sensor
7.1.1 Default Settings for LED
During normal operation, both LEDs are switched off. The LEDs will indicate different status of
the sensor
LED 1 (left side)
Indication of Warning
LED 2 (right side)
Indication of Error
Flashing slowly
Warning because of no media
Error because of range
overflow
Flashing rapidly
Warning because current
measurement accuracy can’t be
guaranteed because sensor is outside
of specification.
General device error
indicated as global failure.
7.1.2 Default Settings of mA Output
During normal operation, the sensor will transmit the results of the measurment on the analog
output in the range of 4…20 mA. In case of specific situations, the senor will indicate the status
in the factory settings using 3,95 mA; 20.05 mA or 22.00 mA.
Description of Status
mA Value
Category
Underrange limit
3.95mA
Warning
Overrange limit
20.05mA
Warning
No Media
3.95mA
Warning
Outside Specification
3.95mA
Warning
Underflow
3.95mA
Error
Overflow
20.05mA
Error
Global Failure
22.00mA
Error
7.1.3 Default settings of Ranges
The sensor is delivered with the following default settings.
Analog Output 1 (X45 on terminals 4 and 5)
Conductivity 1 with measurement range 0…200 mS/cm
Analog Output 2 (X67 on terminals 6 and 7)
Temperature with measurement range 0…150 °C
Digital Input (X3 on terminal 3)
Active high

Operating Manual ILM-4 16
7.2 Examples of sensor settings
Several examples of settings that can be created on the Simple User Interface or on the user inter-
face of the PC follow (setting of a customized conductivity 1, the associated temperature coeffi-
cient and the concentration curve).
7.2.1 Setting of customer-specific concentration curve via MPI-200 software
After the PC software is started, a customer-specific curve for the concentration can be entered via
the following node: Conductivity Measurement →Concentration C →(+). Values need to be en-
tered for at least two X and Y points. Up to 8 support points for X and the associated Y values can
be entered to establish the relationship between conductivity (X) and concentration (Y). The Y val-
ues together with the associated X values form coordinates that act as support points for the line-
arization curve. If 0 is entered for any of these points, that support point is deactivated.
X-Point 01 up to X-Point 08 (Conductivity): This parameter is used to define the customer-specific
measurement range of the conductivity. Values can be entered from 0…1000 mS/cm.
Y-Point 01 up to Y-Point 08 (Concentration): This parameter is used to define the customer-spe-
cific measurement range of the concentration. Values can be entered from 0...100%.

Operating Manual ILM-4 17
7.2.2 Example for setting conductivity 1 using the display
Alternatively, to entering the measurement range as described above, the measurement range can
also be adjusted by entering an ID code.
To do so, go to “YES” on the ID search page and enter the ID code using the buttons. After the code
is confirmed, the sensor display shows the menu in which the parameter can be adjusted.
Calibr.
QuickSetup
Setup
ID Search
0 mS/cm
ID: 013091
200.0mS/cm
0200.00
Range Cd 1
TempComp C
TempComp 2
Conducty 1
Quick Setup
TempComp C
TempComp 2
Range Cd 1
Quick Setup
Range Cd 1
xxx °C
Range Cd 1
Conducty 1
0 mS/cm
Conducty 1
Range Cd 1
Conducty 1
0 mS/cm
ID: 013091
Range Cd 1
0 mS/cm
ID: 013091
Range Cd 1
ID: 013091
Conducty 1
0 mS/cm
ID: 013091
Range Cd 1
Conducty 1
0 mS/cm
ID: 013091
Conducty 1
Range Cd 1
last step
for all
digits
Repeat the
ID: 013091
0 mS/cm
Menu
0200.0
0200.0
0200.0
0200.0
Save Data?
No / Yes
Temperatur
0200.0
ILM-4
Conducty 1
0 mS/cm
R l.
R
R l.
R
Rl.
R/L
R l.
Rl.
R
Rl.
Rl.
R l.
R : Right button
R l. : Right button (long)
L : Left button
L l. : Left button (long)

Operating Manual ILM-4 18
8Installation of the „Large User Interface“ (LUI)
1. Remove the complete signal module in case a small display (SUI) is mounted (cont. 4)
2. Remove the small display unit from the signal module
3. Install the signal module in the sensor head
4. Mount large display interface
Hot-plug function: The large display can be installed while the sensor is energized, but this re-
quires the usual precautionary measures when working with electronic components.
If the display is being installed while energized, it is necessary to press both buttons simultane-
ously for > 10 s after the display is installed to activate the display.
8.1 Retrofitting the display if a display was not yet installed
In case the connection unit is hidden by a plastic cover, please remove the plastic cover. The large
display can be inserted in the head of the sensor. The tabs (Fig. 2) must be inserted in the appro-
priate openings on the puck (Fig. 1). Then the display can be easily pressed onto the puck. No wir-
ing is required.
Note: After the Large User Interface is mounted, the sensor can only be operated on this display
since the display conceals the connector for the MPI-200 adapter. If operating the sensor using the
programming software is preferred, the display must be removed. Then the connector of the pro-
gramming adapter can be plugged in.
Fig. 1
Fig. 2
Fig. 3
Attention: The connector of the programming adapter (Fig. 3) must be connected in the correct
direction →the green spacer must face the cable exit (M12 connector or PG).
Remove the plastic cover: To do so, bend the tabs
slightly inwards with a screwdriver to be able to
remove the cover easily.

Operating Manual ILM-4 19
8.2 Retrofitting the display if a small display (SUI) was already installed
First the puck with the mounted display needs to be removed using the puck puller tool (Fig. 4). To do so,
detach the wires from the cable terminal. Then insert the five arms of the puck puller in the plastic tabs
of the puck (Fig. 5).
Push the puck puller all the way into the sensor head and push
the disk as far as possible toward the sensor head so that the
arms of the puck puller firmly grasp the puck.
Pull the puck with the display out of the sensor housing and
pull the small display off the puck.
Now the puck without the display can be properly positioned and installed back in the sensor head
and the wiring can be reconnected to the cable terminal. Then the large display can be mounted →
see "Retrofitting the display if a display was not yet installed".
8.3 Using the large display
The large display (LUI) is operated in the same way as the small display (SUI). It is operated using two
operating buttons below the display:
After the sensor is started, the screen saver appears in which the process values of the sensor are
displayed one after the other. To reach the start page from here, press one of the two buttons briefly.
Further information on operating the display can be found in the quick start manual and in the oper-
ating manual.
Fig. 4
Fig. 5

Operating Manual ILM-4 20
9Dimensions
For all process connections, the conductivity sensor can be ordered with a submersion length of
L20 (20 mm) or L50 (50 mm).