Aplisens LI-24G User manual

USER’S MANUAL
TEMPERATURE TRANSMITTERS
LI-24L
LI-24G
EN.IO.LI.24.L.G
AUGUST 2021
APLISENS S.A., 03-192 Warsaw, Morelowa 7 St,
tel. [phone]; fax [phone]
www.aplisens.com, e-mail: [email protected]
Revision 01.A.003

PRODUCT CODE –see (➔Transmitter identification).
The QR code or ID number identifies the transmitter and provides quick access to the following documentation
on the manufacturer’s website: user’s manual, explosion-proof device user manual, declarations of conformity
and copies of certificates.
LI-24L
ID: 0024 0009 0008 0000 0000 0000 0001 05
ID: 0024 0013 0010 0000 0000 0000 0001 25
www.aplisens.pl/ID/002400090008000000000000000105/
LI-24L (Exi)
ID: 0024 0009 0008 0000 0000 0001 0001 53
ID: 0024 0013 0010 0000 0000 0001 0001 73
www.aplisens.pl/ID/002400090008000000000001000153/
LI-24G
ID: 0025 0010 0008 0000 0000 0000 0001 68
ID: 0025 0014 0010 0000 0000 0000 0001 88
www.aplisens.pl/ID/002500100008000000000000000168/
LI-24G (Exi)
ID: 0025 0010 0008 0000 0000 0001 0001 19
ID: 0025 0014 0010 0000 0000 0001 0001 39
www.aplisens.pl/ID/002500100008000000000001000119/

Symbols used
Symbol
Description
Warning to proceed strictly in accordance with the information contained in the doc-
umentation in order to ensure the safety and full functionality of the device.
Information particularly useful during installation and operation of the device.
Information particularly useful during installation and operation of an Ex type device.
Information on disposal of used equipment.
BASIC REQUIREMENTS AND SAFE USE
The manufacturer will not be liable for damage resulting from incorrect installation,
failure to maintain a suitable technical condition of the device or use of the device
other than for its intended purpose.
Installation should be carried out by qualified staff having the required authoriza-
tions to install electrical and I&C equipment. The installer is responsible for perform-
ing the installation in accordance with manual as well as with the electromagnetic
compatibility and safety regulations and standards applicable to the type of installa-
tion.
All safety and protection requirements must be observed during installation, opera-
tion and inspections.
If a malfunction occurs, the device should be disconnected and handed over to the
manufacturer for repair.
In order to minimize the risk of malfunction and associated risks to staff, the device
is not to be installed or used in particularly unfavourable conditions, where the fol-
lowing hazards occur:
-possible mechanical impacts, excessive shocks and vibration;
-excessive temperature fluctuation;
-water vapour condensation, dusting, icing.
Changes made to the manufacturing of products may be introduced before the paper version of the
manual is updated. The up-to-date manuals are available on the manufacturer's website:
www.aplisens.com.

EN.IO.LI.24.L.G
4Revision 01.A.003/2021.08
TABLE OF CONTENTS
1. INTRODUCTION..........................................................................................6
1.1. Purpose of the document............................................................................................6
1.2. Registered trademarks................................................................................................6
1.3. Definitions and abbreviations......................................................................................7
1.4. Transmitter set range..................................................................................................8
2. SAFETY.......................................................................................................9
3. TRANSPORT AND STORAGE..................................................................10
3.1. Delivery check...........................................................................................................10
3.2. Transport...................................................................................................................10
3.3. Storage .....................................................................................................................10
4. GUARANTEE ............................................................................................10
5. IDENTIFICATION.......................................................................................11
5.1. Manufacturer's address.............................................................................................11
5.2. Transmitter identification...........................................................................................11
5.3. CE mark, declaration of conformity...........................................................................11
6. INSTALLATION.........................................................................................12
6.1. General recommendations........................................................................................12
6.1.1. Installation of rail-mounted transmitter LI-24L on a DIN rail...............................12
6.1.2. Installation of head-mounted transmitter LI-24G in the housing.........................13
7. ELECTRICAL CONNECTION....................................................................15
7.1. Cable connection to transmitter terminals.................................................................15
7.1.1. Cable connection ...............................................................................................15
7.1.2. Options for connecting sensors, potentiometers and voltage sources to the
transmitter.......................................................................................................................16
7.2. Connection of transmitters with the option of using local HART communication.......17
7.3. Transmitter power supply..........................................................................................18
7.3.1. Transmitter supply voltage.................................................................................18
7.3.2. Specifications of electrical switching terminals...................................................18
7.3.3. Resistance load in power supply line .................................................................18
7.3.4. Shielding, equipotential bonding ........................................................................19
7.4. Final inspection of cabling.........................................................................................19
8. START-UP.................................................................................................19
8.1. Alarm configuration...................................................................................................19
8.2. Configuration of the operating mode.........................................................................22
8.3. Metrological parameters, types of sensors, measuring ranges and errors................22
9. OPERATION..............................................................................................26
9.1. Operating temperature..............................................................................................26
9.2. Remote configuration of setpoints (HART 5).............................................................26
9.2.1. Compatible devices............................................................................................26
9.2.2. Compatible configuration software.....................................................................26
9.2.3. Method of connecting communication devices...................................................26
10.MAINTENANCE.........................................................................................27
10.1. Periodic inspections..................................................................................................27

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 5
10.2. Non-periodic inspections...........................................................................................27
10.3. Spare parts................................................................................................................27
10.4. Repair........................................................................................................................27
10.5. Returns......................................................................................................................27
11.SCRAPPING, DISPOSAL ......................................................................... 27
12.HISTORY OF REVISIONS......................................................................... 27
LIST OF FIGURES
Figure 1. Set range and measurement limits...........................................................................8
Figure 2. Warning plate - protective seal.................................................................................9
Figure 3. Examples of LI-24G transmitter nameplates in standard and Exi version..............11
Figure 4. Examples of LI-24L transmitter nameplates in standard and Exi version...............11
Figure 5. LI-24L transmitter installation on a DIN rail. ...........................................................12
Figure 6. Installation of the LI-24G transmitter in an example enclosure manufactured by
Aplisens. ................................................................................................................................13
Figure 7. Fastening screw lock protection in the LI-24G transmitter. ....................................14
Figure 8. Markings of LI-24L transmitter terminals................................................................15
Figure 9. Markings of LI-24G transmitter terminals. ..............................................................15
Figure 10. Methods of connecting sensors, potentiometers and voltage sources.................16
Figure 11. Electrical connection 4…20 mA of HART to transmitters in standard version......17
Figure 12. Electrical connection 4...20 mA of HART to transmitters in Exi version. ..............17
Figure 13. Set range current, saturation currents, alarm currents in standard mode. ...........19
Figure 14. Set range current, saturation currents, alarm currents in NAMUR mode.............20
Figure 15. LED indicator on the LI-24L transmitter................................................................21
LIST OF TABLES
Table 1. Definitions and abbreviations.....................................................................................7
Table 2. Permissible transmitter supply voltages...................................................................18
Table 3. Metrological parameters of RTD sensors. ...............................................................23
Table 4. Metrological parameters of thermocouples..............................................................24
Table 5. Types of measurements, linearization and mathematical operations. .....................25

EN.IO.LI.24.L.G
6Revision 01.A.003/2021.08
1. INTRODUCTION
1.1. Purpose of the document
The subject of manual are rail-mounted smart temperature transmitters LI-24L and head-mounted
smart temperature transmitters LI-24G, hereinafter referred jointly to as LI-24L(G). The manual ap-
plies to the following versions: standard and intrinsically safe Exi.
The manual contains data, tips and general recommendations for safe installation and operation of
the transmitters, as well as troubleshooting in case of possible failure.
The manual does not cover explosion protection issues.
The use of the equipment in hazardous zones without appropriate approvals is forbidden.
It is mandatory to read EN.IX.LI.24.L.G Explosion-proof Device User Manual, containing
important information related to the installation of intrinsically safe version of the transmit-
ters.
1.2. Registered trademarks
HART®is a registered trademark of FieldComm Group.
Windows®is a registered trademark of Microsoft Corporation.
Google Play®is a service registered and managed by Google®Inc.

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 7
1.3. Definitions and abbreviations
Table 1. Definitions and abbreviations.
Item
no.
Abbr.
Meaning
1
LRV
“Lower Range Value” – the value of the set range expressed in the units of temperature,
resistance or voltage corresponding to the current of 4,000 mA, i.e. 0% of the output setpoint.
The set range must not exceed limits which depend on the selected measurement type. The
minimum width of the set voltage range |(URV-LRV)| is limited by software to 10°C for resis-
tive sensors (10 Ω for resistance measurement) or 50°C for voltage type sensors (50 mV for
voltage measurement).
2
URV
“Upper Range Value” — the value of the set range expressed in the units of temperature,
resistance or voltages corresponding to the current of 20,000 mA, i.e. 100% of the output
setpoint. The set range must not exceed the set range limits which depend on the selected
measurement type. The minimum width of the set voltage range |(URV-LRV)| is limited by
software to 10°C for resistive sensors (10 Ω for resistance measurement) or 50°C for voltage
type sensors (50 mV for voltage measurement).
3
LRL
LSL
“Lower Range Limit” or “Lower Sensor Limit” – the lower limit of the set range expressed in
the units of temperature, resistance or voltage. Value (URL-LRL) or (USL-LSL) is referred to
as the transmitter base range and depends on the selected measurement type.
4
URL
USL
“Upper Range Limit” or “Upper Sensor Limit” – the upper limit of the set range expressed in
the units of temperature, resistance or voltage. Value (URL-LRL) or (USL-LSL) is referred to
as the transmitter base range and depends on the selected measurement type.
5
LPL
“Lower Processing Limit” – the lower limit of digital processing of the measured value. The
transmitter digitally processes the measurement below the lower limit of the LRL/LSL set
range. When LPL is reached, the transmitter freezes digital value measurement refreshing.
Depending on the settings, the diagnostic alarm mode may be enabled. In addition, collective
statuses of the transmitter will be set: “Sensor error”, “First Process Variable Calculation Er-
ror”, “First Process Variable out of Range” and “Second or Subsequent Process Variables
out of Range”. These can be read out in the diagnostic tab via the HART communication.
6
UPL
“Upper Processing Limit” – the upper limit of digital processing of the measured value. The
transmitter digitally processes the measurement up to the upper limit of the URL/USL set
range. When UPL is reached, the transmitter freezes digital value measurement refreshing.
Depending on the settings, the diagnostic alarm mode may be enabled. In addition, collective
statuses of the transmitter will be set: “Sensor error”, “First Process Variable Calculation Er-
ror”, “First Process Variable out of Range” and “Second or Subsequent Process Variables
out of Range”. These can be read out in the diagnostic tab via the HART communication.

EN.IO.LI.24.L.G
8Revision 01.A.003/2021.08
1.4. Transmitter set range
The figure below shows the transmitter LRV/URV set range, limits related to the LRL/URL permissible
set range, LPL/UPL digital processing range of the A/D measuring transmitter. As standard, current
values of 4 mA/20 mA are assigned to LRV/URV points. In order to obtain reverse characteristics, it is
possible to reverse the assignment so that the LRV/URV points are assigned to 20 mA/4 mA currents.
Figure 1. Set range and measurement limits.

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 9
2. SAFETY
−The installation and start-up of the device and any activities related to operation shall
be carried out after thorough examination of the contents of user’s manual and the in-
structions related thereto;
−installation and maintenance should be carried out by qualified staff having the re-
quired authorizations to install electrical and measuring devices;
−the device shall be used according to its intended purpose in line with the permissible
parameters specified on the nameplate (➔Transmitter identification);
−the protection elements used by the manufacturer to ensure transmitter safety may be
less effective if the device is operated in a manner not consistent with its intended
purpose;
−before installing or disassembling the device, it is absolutely necessary to disconnect it
from the power source;
−no repairs or alterations to the transmitter electronic system are permitted. Assess-
ment of damages and possible repair may only be performed by the manufacturer or
authorized representative;
−do not use instruments if damaged. In case of malfunction, the device must be put out
of operation;
−it is not allowed to tear or damage the protective seal on the housing.
Figure 2. Warning plate - protective seal.

EN.IO.LI.24.L.G
10 Revision 01.A.003/2021.08
3. TRANSPORT AND STORAGE
3.1. Delivery check
After receiving the delivery of the equipment, it is necessary to:
-make sure that the packaging and its contents were not damaged during transport;
-check the completeness and correctness of the received order, and make sure no parts are
missing.
3.2. Transport
Transport of transmitters shall be carried out with the use of covered means of transport, in original
packages. The packaging shall be protected against movement and direct impact of atmospheric fac-
tors.
3.3. Storage
Transmitters shall be stored in a factory packaging, in a room without vapours and aggressive sub-
stances, protected against mechanical impact.
Allowable range of storage temperature:
-40…85°C (-40...185°F).
4. GUARANTEE
General terms and conditions of guarantee are available on the manufacturer’s website:
www.aplisens.com/ogolne_warunki_gwarancji
The guarantee shall be repealed if the device is used against its intended use, failure to
comply with user’s manual or interference with the structure of the device.

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 11
5. IDENTIFICATION
5.1. Manufacturer's address
APLISENS S.A.
03-192 Warsaw
Morelowa 7 St
Poland
5.2. Transmitter identification
Depending on the version of the transmitter, the nameplates may differ in the amount of information
and parameters.
Figure 3. Examples of LI-24G transmitter nameplates in standard and Exi version.
Figure 4. Examples of LI-24L transmitter nameplates in standard and Exi version.
1. Logo and name of the manufacturer.
2. Transmitter type.
3. CE mark.
4. Product QR code.
5. Transmitter model ID.
6. Types of measuring inputs.
7. Supply voltage values.
8. Permissible range of ambient temperature.
9. Output signal.
10. Note about the obligation to read the manual.
11. Transmitter serial number.
12. Year of manufacture.
13. Designation of the explosion-proof type, certificate designation in case of ATEX certified transmitters.
14. Intrinsic safety parameters, i.e.: Ui, Ii, Pi, Li, Ci, Uo, Io, Po, Co, Lo.
15. Number of the notified body for transmitters with ATEX certificate.
5.3. CE mark, declaration of conformity
The device has been designed to meet the highest safety standards, has been tested and has left the
factory in a condition that is safe for operation. The device complies with the applicable standards and
regulations listed in the EU Declaration of Conformity and has CE marking on nameplate.

EN.IO.LI.24.L.G
12 Revision 01.A.003/2021.08
6. INSTALLATION
6.1. General recommendations
It is recommended to install the transmitters in closed enclosures in order to ensure pro-
tection against environmental factors.
6.1.1. Installation of rail-mounted transmitter LI-24L on a DIN rail
Figure 5. LI-24L transmitter installation on a DIN rail.
1. Rail-mounted transmitter LI-24L.
2. Movable clip.
3. DIN 35 rail.
Insert the movable clip (2) of the LI-24L transmitter housing (1) over the DIN rail (3). Then press the
transmitter (1) towards the rail (3). Ensure that the movable clip (2) is clamped on the rail (3). To re-
move the transmitter, pull the movable clip (2) out with a flat-end screwdriver (put the screwdriver
through the clip lug (2)) and slide the transmitter (1) off the rail (3).

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 13
6.1.2. Installation of head-mounted transmitter LI-24G in the housing
Pull the connection cables of the measuring unit (6)
through the centre hole of the insulating washer (5) and
then through the centre hole of the head-mounted trans-
mitter (4).
Screw the fastening screws with the mounted springs (3)
into the transmitter mounting holes (4) and insert them
through the holes in the insulating washer (5) and the
measuring unit (6).
Mount the head-mounted transmitter (4) together with the
insulating washer (5) and the measuring unit (6) to the
housing (7) using the fastening screws with mounted
springs (3).
Connect the connection cables of the measuring unit (6)
to the measuring terminals of the head-mounted transmit-
ter (4) according to section 7 of user’s manual.
Unscrew the cable gland, pull the power cable through the
cable gland opening into the housing (7). Connect the
power supply cables according to section 7.1.1 of user’s
manual to the power terminals of the head-mounted
transmitter (4). Gently pull out the excess cable and tight-
en the cable gland.
Screw the housing cover (1) together with the gasket (2)
onto the housing (7).
Screw in the protective tube of the measuring unit (8).
Figure 6. Installation of the LI-24G transmitter in an example enclosure manufactured by Aplisens.
1. Housing cover.
2. Cover gasket.
3. Fastening screws.
4. Head-mounted transmitter LI-24G.
5. Insulating washer.
6. Measuring unit.
7. Housing.
8. Sensing element protective tube.

EN.IO.LI.24.L.G
14 Revision 01.A.003/2021.08
The head-mounted transmitter LI-24G is equipped with fastening screw lock protection in the form of
locks in the mounting holes. The lock is suitable for use with screw threads, and therefore the screws
must be screwed into the transmitter housing.
Pushing the fastening screws into the mounting holes instead of screwing them in may
damage the screw lock protection.
Figure 7. Fastening screw lock protection in the LI-24G transmitter.

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 15
7. ELECTRICAL CONNECTION
7.1. Cable connection to transmitter terminals
All connection and installation operations must be performed with disconnected supply volt-
age and other external voltages, if used.
Failure to provide proper connection of the transmitter may result in danger.
Risk of electric shock and/or ignition in potentially explosive atmospheres.
7.1.1. Cable connection
In the LI-24L(G) transmitter, the 4…20 mA current loop power supply and signal cables must be con-
nected to respective “+” and “-” terminals.
In order to perform correct connection of the cables, the following steps shall be performed:
−disconnect power supply of the supply cable line before connecting the transmitter cabling;
−connect the transmitter in accordance with figures below and section ➔7.1.2, paying attention
to the correct tightening of the screws fixing the conductor core to the terminal;
−depending on the assumed earthing model of the system, attach the cable screen to the bolted
terminal of the body ground or cut the excess of the screen and secure with the insulation
without connecting to the body ground (applies to LI-24G in housing).
Figure 8. Markings of LI-24L transmitter terminals.
Figure 9. Markings of LI-24G transmitter terminals.

EN.IO.LI.24.L.G
16 Revision 01.A.003/2021.08
7.1.2. Options for connecting sensors, potentiometers and voltage sources to the
transmitter
Figure 10. Methods of connecting sensors, potentiometers and voltage sources.

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 17
7.2. Connection of transmitters with the option of using local HART communication
The method of connecting a modem to transmitter for local HART communication is shown in the fig-
ures below.
In order to communicate using locally connected HART modem to the transmitter ‘’+’’ and
‘’-‘’ terminals, make sure that the ROresistance viewed from the side of transmitter termi-
nals towards power source is in the range of 240 Ω≤RO≤1100 Ω.
Figure 11. Electrical connection 4…20 mA of HART to transmitters in standard version.
Figure 12. Electrical connection 4...20 mA of HART to transmitters in Exi version.

EN.IO.LI.24.L.G
18 Revision 01.A.003/2021.08
It is mandatory to read EN.IX.LI.24.L.G Explosion-proof Device User Manual, containing
important information related to the installation of transmitters in intrinsically safe ver-
sion.
The converter may also be operated using Aplisens Mobile Configurator installed on smartphones
with Android system and connected using wireless communication.
The software is available on Google Play®
https://play.google.com/store/apps/details?id=com.aplisens.mobile.amc
7.3. Transmitter power supply
7.3.1. Transmitter supply voltage
Power cables may be live.
In case of incorrect connection there is a risk of electric shock and/or explosion.
Installation of the transmitter in explosion-risk atmospheres must comply with the require-
ments of relevant instructions and national standards and regulations.
All explosion protection data is given in manual EN.IX.LI.24.L.G.
Table 2. Permissible transmitter supply voltages.
Version
Minimum supply voltage
Maximum supply voltage
Standard
10 V DC
36 V DC
Exi*
10 V DC
30 V DC
*For details on the intrinsically safe version, see manual EN.IX.LI.24.L.G.
7.3.2. Specifications of electrical switching terminals
Electrical switching terminals are suitable for conductors with the cross-section area of:
-for LI-24L: ≤2,5 mm2;
-for LI-24G: ≤1,75 mm2.
Possible cables to be used:
-unshielded when using the analogue signal only;
-shielded, approved for the HART communication;
-shielded on the sensor(s) side for a cable length greater than 30 m.
7.3.3. Resistance load in power supply line
The power line resistance, power source resistance and other additional resistances connected in
series increase the voltage drops between the power source and the transmitter terminals. The max-
imum transmitter current under normal operation conditions may amount to 20,500 mA. However, the
power balance should take into account situation where user sets a ‘’Custom’’ alarm with a maximum
value of 23,000 mA.
The maximum resistance value in the power circuit (along with the power cables resistances) is de-
fined by the formula:
where:
U –voltage at the supply terminals of 4…20 mA current loop [V].
RL_MAX –maximum power line resistance [Ω].

EN.IO.LI.24.L.G
Revision 01.A.003/2021.08 19
7.3.4. Shielding, equipotential bonding
Optimal protection against interference is provided by the earthing of the screen on both sides (in the
cabinet and equipment). In case of potential difference between earthing points of devices which may
result in the flow of equipotential currents, the screen shall be earthed on one side.
7.4. Final inspection of cabling
After completing the electrical installation of the transmitter, it is necessary to check the following:
-does the supply voltage measured at the transmitter terminals at maximum set current match
the range of supply voltage specified on the transmitter nameplate?
-Is the transmitter connected according to the information given in section (➔Cable connection
to transmitter terminals)?
-Are all the screws tightened?
-Are the cable terminals tightened?
-Is the cable gland tightened?
8. START-UP
Upon request, the customer receives a transmitter configured according to the setpoints specified in
the order. The current base range and the basic unit of the transmitter can be read out from the de-
vice via the HART communication.
8.1. Alarm configuration
The LI-24L(G) transmitter has developed internal diagnostics which monitors the operation of trans-
mitter’s electronic circuits, process and environmental parameters. Diagnosed dangerous conditions
or malfunctions of the transmitter internal systems, depending on the settings, may result in enabling
alarm current. The user can enable/disable diagnostics. By default, current alarms are disabled.
The figures below shows the normal operation ranges of the transmitter process output as well as
saturation and alarm current ranges.
Figure 13. Set range current, saturation currents, alarm currents in standard mode.
1 –Set 4...20 mA current area corresponding to setpoint 0...100% of the process output.
2 –Lower saturation current of 3,900 mA.

EN.IO.LI.24.L.G
20 Revision 01.A.003/2021.08
3 –Upper saturation current of 20,500 mA.
4 –Alarm current area I_AL<3,750 mA for internal diagnostic alarms.
5 –Alarm current area I_AL>21,600 mA for internal diagnostic alarms.
The user can define the value of the alarm current (CUSTOM) in the range from 3,600 mA to
23,000 mA. The CUSTOM mode should be used with caution as it allows setting the alarm condition
(constant current value) in the basic working area of the current loop (4…20 mA).
Figure 14. Set range current, saturation currents, alarm currents in NAMUR mode.
1 –Set 4...20 mA current area corresponding to setpoint 0...100% of the process output.
2 –Lower saturation current of 3,800 mA.
3 –Upper saturation current of 20,500 mA.
4 –Alarm current area I_AL<3,600 mA for internal diagnostic alarms.
5 –Alarm current area I_AL>21,000 mA for internal diagnostic alarms.
Temperature transmitters LI-24L(G) manufactured by Aplisens meet the alarm require-
ments Namur NE 89 and Namur NE 43.
The user can define the value of the alarm current (CUSTOM) in the range from 3,600 mA to
23,000 mA. The CUSTOM mode should be used with caution as it allows setting the alarm condition
(constant current value) in the basic working area of the current loop (4…20 mA).
The transmitter diagnostics continually tests the environmental parameters:
-temperature of the ADC transducer converting the electric signal from the temperature sensor
to the digital value of measurement;
-temperature of the CPU unit (transmitter’s main microcontroller). If the transmitter operating
temperature limits are exceeded, the diagnostics, depending on the settings, will trigger an
alarm current. Temperature return to permissible operating range of the transmitter will result
in deactivation of the diagnostic alarm mode and restoration of normal operation.
The transmitter diagnostics continually tests the process parameters of temperature:
-if the measured process variable value increases above the upper value of the base range rel-
ative to URL, when UPL is reached, the diagnostics, depending on the settings, will trigger