LEVTECH LSP-TCT-WIFI User manual

User Manual
Lueta Nr. 319, Romania
[phone]
offi[email protected]
www.levtech.ro
Conductivity and temperature
transmitter
LSP-TCT-WIFI

PREFACE..................................................................................................................... 3
Document Revisions .....................................................................................................4
Approvals......................................................................................................................4
1. INTRODUCTION.......................................................................................................5
1.1. General Information .................................................................................... 5
1.2. Support and Services...................................................................................5
1.3. Disposal Remarks........................................................................................5
2. SAFETY INSTRUCTIONS.........................................................................................6
2.1.Symbols....................................................................................................... 6
2.2. Receipt and unpacking.................................................................................6
2.3. Environment................................................................................................ 6
2.4. Mounting......................................................................................................6
2.5. Cleaning ......................................................................................................7
3. INSTALLATION AND WIRING ...................................................................................8
3.1. Installation on TS-35 DIN Rail.......................................................................8
3.2. Connections with Screw Terminals...............................................................8
4. DESCRIPTION..........................................................................................................9
5. FEATURES ...............................................................................................................9
6. SPECIFICATIONS .................................................................................................. 10
7. TERMINAL DESIGNATION..................................................................................... 11
8. DIMENSIONS..........................................................................................................12
9. CONFIGURATION OF THE PARAMETERS............................................................13
10. DEFAULT CONFIGURATION ................................................................................20
11. FUNDAMENTALS OF CONDUCTIVITY MEASUREMENT ................................... 21
12. ELECTRICAL DIAGRAMS.....................................................................................22
13. APPLICATIONS .................................................................................................... 25
14.OPERATION AND MAINTENANCE .......................................................................26
14.1. Operation .................................................................................................26
14.2. Maintenance ............................................................................................26
15. WARRANTY DISCLAIMER....................................................................................26
16. CONTACT INFORMATION ....................................................................................27
Table of Contents

Thank you for selecting our isolated signal converter splitter.
This User Manual contains information needed for proper installation, operation, and
maintenance of your product. A thorough understanding of these simple instructions will
help you get the most of your product.
This document should be read thoroughly, and the safety instructions described in this
manual should be followed carefully. If you have questions or concerns about the
operation and maintenance of this product, please contact our customer support.
Should a problem arise with the product, check if you followed the installation steps
correctly. If the problem persists, contact an authorized Levtech dealer or our customer
support.
All information in this User Manual is based on the latest product information available at
the time of printing approval. Levtech reserves the right to make changes at any time
without notice and without incurring any obligation.
Please always keep this manual together with the isolator as a reference to everyone
who uses this product.
PREFACE
3

Approvals
This document requires following approvals:
Date Version Number Document Changes
03-11-2021 1.0 Initial draft
04-13-2021 2.0 Overall improvements
04-15-2021 3.0 Application examples added
Name Title
Levi Mihaly General Manager
Document Revisions
4

5
1.1.
General Information
1.2. Support and Services
1.3. Disposal Remarks
Lueta Nr. 319, Romania
[phone]
offi[email protected]o
www.levtech.ro
1. INTRODUCTION
This manual is the designated User Manual for the installation, safe operation, and
maintenance of your product. It is divided into nine chapters covering general
information, safety instructions, how to safely install and operate the product,
maintenance, warranty, and contact information.
All personnel involved in the installation, operation, and maintenance of this equipment
should read and understand this manual, particularly its safety instructions. Substandard
performance and longevity, property damage, and personal injury may result from not
knowing and following these instructions.
In order to ensure long product life, Levtech recommends that you utilize the product and
perform maintenance by correctly following the instructions described in this guide. The
manufacturer’s warranty does not cover any damage resulting from the neglect of these
instructions.
Levtech assumes no liability for damage caused by operation contrary to what is
specified in this operating manual.
For information about further questions that are not answer in this manual, additional
materials, and support, please contact:
DO NOT dispose of the outboard motor with domestic waste!
Electronic devices have to be disposed of according to the regional directives on
electronic and electric waste disposal. In case of further questions, please consult your
supplier. The supplier may take care of proper disposal.

6
2.2. Receipt and unpacking
2.3. Environment
2.4. Mounting
2. SAFETY INSTRUCTIONS
2.1. Symbols
WARNING
CAUTION
NOTICE
This symbol indicates information that, if ignored, could result possibly in
personal injury or even death due to incorrect handling.
This symbol indicates information that, if ignored, could possibly result in
personal injury or physical damage due to incorrect handling.
Indicates information considered important, but not hazard-related.
Unpack the device without damaging it and check whether the device type corresponds
to the one ordered. The packing should always follow the device until this has been
permanently mounted.
Avoid direct sunlight, dust, high temperatures, mechanical vibrations and shock, and rain
and heavy moisture.
Only technicians who are familiar with the technical terms, warnings, and
instructions in the manual and who are able to follow these should connect the
device.
Mounting and connection of the device should comply with national legislation for
mounting of electric materials, i.e. wire cross section, protective fuse, and location.
Descriptions of input / output and supply connections are shown in this installation
guide and on the side label.
Use this device only in accordance with this instruction manual, as well as all
applicable local and national laws and regulations. Only allow this device to be
installed, operated, maintained, repaired, etc. by others who have also read and
understood the user manual.
Do not allow minors, untrained personnel, or personnel suffering from physical or
mental impairment that would affect their ability to follow this manual to install,
operate, maintain, or repair this device.
Any untrained personnel who might be near the device while it is in operation
MUST be informed that it is dangerous and fully instructed on how to avoid injury
during its use.

7
WARNING
CAUTION
2.5. Cleaning
WARNING
To avoid the risk of electric shock and fire, the safety instructions of this guide
must be observed and the guidelines followed.
When disconnected, the device may be cleaned with a cloth moistened with distilled
water.
The specifications must not be exceeded, and the device must only be applied
as described in the following.
Do not use the device near water or moisture.
Do not install near any heat sources such as radiators, stoves or other heaters
that produce heat.
To prevent ignition of the explosive atmospheres, disconnect power before
servicing and do not separate connectors when energized and an explosive
gas mixture is present.
Do not mount or remove devices from the power rail when an explosive gas
mixture is present.
Before the commissioning of the device, this installation guide must be
examined carefully, and only qualified personnel (technicians) should install
this device.
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
To avoid the risk of explosion due to electrostatic charging of the enclosure, do
not handle the units unless the area is known to be safe, or appropriate safety
measures are taken to avoid electrostatic discharge.

3. INSTALLATION AND WIRING
3.2. Connections with Screw Terminals
3.1. Installation on TS-35 DIN Rail
Inserting the Module in the Rail:
Removing the Module in the Rail:
The module is designed to be installed, in a vertical position, on TS-35 DIN rail. For the
best module performance and duration, avoid placing objects that could obstruct the
ventilation. Never install the modules near heat sources.
1) Attach the module in the upper part of the rail, as shown in the left figure below.
2) Press the module downwards.
1) Apply leverage using a screwdriver, as shown in the left figure below.
2) Press the module upwards.
8
The module has been designed for screw-type terminal electrical connections. Proceed
as follows to make the connections:
1) Strip the cables by 8mm.
2) Insert a screwdriver in hole, unscrewing the screw.
3) Insert the cable in the round hole.
4) Again, use the screwdriver to tight the screw.
5) Remove the screwdriver and make sure that the cable is tightly fastened in the
terminal.
0,2...2,5 mm²
8 mm

9
4. DESCRIPTION
The LSP-TCT-WIFI conductivity transmitter is designed to measure the conductivity,
resistivity and temperature of the liquids with the corresponding sensor. This instrument
is suitable for high-purity water monitoring and water treatment applications, such as
reverse osmosis or ion exchanger. With its DIN rail mountable housing, it is easy to install
into industrial environments. Configuration of the parameters can be easily done by
accesing the device through its WiFi connection.
WiFi connection for configuration
MODBUS
Conductivity, resistivity and temperature measurement
Configurable signal output for the conductivity (0 -20mA; 4-20mA; 0-24mA; 0-10V)
Configurable signal output for the temperature (0 -20mA; 4-20mA; 0-24mA; 0-10V)
Switching digital output Relay (Switching point is configurable)
Cyclical self calibration
Linear temperature compensation
Electrically isolated input, output and supply
DIN rail mounting
Compensation of the cable capacity
Calibration of the cell constant
5. FEATURES
9

6. SPECIFICATIONS
10
Input 1
Input type
Resistive 2 electrode conductivity sensor
Conductivity cell types
k=0.01; k=0.1; k=1; k=10
Analog Output 1 Conductivity
Output Signal type 0-10V; 4-20mA; 0-20mA
Output Resistance 0-20mA or 4-20mA >75
Ω
Power Supply
Supply Voltage 12 ~ 30VDC
Power Consumption
<25mA
Reverse-Polarity Protection Yes
Enclosure
IP Rating Ip20
Dimensions (L x D x H) 114.5 x 99 x 22.5 mm
Weight 114g
Mounting TS-35 DIN
Maximum Cable Cross-Section 2.5mm2 (max.)
Enviromental Conditions
Ambient Temperature Range -10 ~ +60ºC
Storage Temperature Range -30 ~ +80ºC
Humidity Level 0 ~95% RH at 40ºC, no condensation
Over Voltage surge protection 36V
General
Output/ Input isolation 2800V
Output accuracy 0 to 200uS/cm +/-0.02 uS/cm
Response time 0.8ms
Output accuracy 0 to 2000uS/cm +/-0.1 uS/cm
Input 2
Input type
Temperature sensor
Temperature sensor types
Pt100, Pt1000, NTC, PTC
A/D Converter resolution 16 bit
Output accuracy -20 to 100 °C 0.5 °C
Analog Output 2 (current type) Temperature
Relay contact 0.5A 24 VDC/AC
Digital output
Output Resistance 0-10V
Analog Output 2 Temperature
Output Signal type 0-10V; 4-20mA; 0-20mA
Output Resistance 0-20mA or 4-20mA >75Ω
Output Resistance 0-10V
>1kΩ
>1kΩ

7. TERMINAL DESIGNATION
11
7
8RS485/USB
Converter
A
B
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
M
ICond
UCond
I
Temp
UTemp
9
10
11
12
V
I
V
I
13
14
L+
M
13
15
16
Relay
Out
Wire1
Wire2 3
4
Wire1
Wire2 1
5
Cell
Temp
Shield
Wire3
2
6
Terminal
number
Type
Description
1
Input
Temperature sensor wire
2
Input
Sensor shield
3
Input
Conductivity sensor wire
4
Input
Conductivity sensor wire
5
Input
Temperature sensor wire
6
Input
Temperature sensor wire
7
Communication
Rs485 B
8
Communication
Rs485 A
9
Output
Temperature value milliamp output
10
Output
Temperature value voltage output
11
Output
Conductivity value milliamp
12
Output
Conductivity value voltage output
13
Supply
0VDC
14
Supply
24VDC
15
Output
Relay output
16
Output
Relay output
WiFi/Init
Power

12
8. DIMENSIONS
22.5mm
114.5mm
99mm

9. CONFIGURATION OF THE PARAMETERS
Step 1
While the LED is blinking, turn on the WiFi
on your phone/computer and connect to
“Conductivity” network. There is a 1,5
minutes time limit that should be respected.
After that, the LED turns stable red again.
Step 2
After a successful connection, scan the
QR code from the faceplate of the device
or open your browser on your phone/
computer and type 192.168.4.1 IP address
in the searching line.
Step 3
When the page is loaded, the power LED
becomes stable blue, click on the “Setup”
button.
Step 4
It’s required to type in the username and
the password and click on Login button.
Username: admin
Password: password
Step 0
Before starting configuration, you need to
connect to a power supply. After 8 short blue
blinks, the Power LED turns a stable red.
Press and hold the WiFi/Init button gently
on the device until the LED starts blinking
blue.
13

10. CONFIGURATION OF THE PARAMETERS
If the connecting was successful, the flashing blue light
becomes to a stable blue light on the transmitter and you are
able to change the parameters to set up your device correctly. If
the LED turned red before get connected, the steps should be
repeated trying to fit into the 1,5 minutes time limit.
On the SETUP PAGE there are informations about the
transmitter, like the serial number and the firmware version.
Next, there are the actual values measured by the transmitter in
real time:
• Impedance (measured in Ohms)
• Conductivity (uS/cm)
• Conductivity TC (uS/cm)
• Temperature (C)
Below, there are all the settings that can be modified by clicking
on the 6 buttons(Measuring, Analog, Relay, Temperature,
Modbus, Calibration) or just scrolling down.
On the very bottom of the screen, the user can Load and
Save the parameters or Logout from the setup page by clicking
on them.
By clicking on the Load button, the actual parameters will
appear in the windows. With the Save button, the new
parameters can be saved.
14

10. CONFIGURATION OF THE PARAMETERS
Measuring parameters
Start Frequency(kHz)
Before the measuring, it can be set the
start frequency, where the measuring
starts.
Frequency Increment(Hz)
This value is added to Start Frequency
in every measuring cycle.
Frequency repeat
It means that how many measures
wanted to be performed.
Settling cycle
How many times will be applied the
settling time after every measurement.
15
Settling time
How long is the Settling time.
K Factor
It’s given by manufacturer of the probe that’s used
Reference Temperature
It means the temperature that the conductivity will be corrected to. In the given
screenshot, the value is 25 Celsius degree.

10. CONFIGURATION OF THE PARAMETERS
Analog
Configuration of the analog outputs
DAC - Digital to Analog Converter
It can be selected the type of the output
between :
• 0-10V
• 4-20mA
• 0-20mA
• 0-24mA
It changes the analog output of
temperature and conductivity outputs at
the same time.
By default, it shows the last loaded type.
TC
We can select the temperature
compensation type. Two possible
options here:
• TC-NO - no compensation
• TC-LIN - linear compensation
Conductivity High(uS/cm)
Assign the desired upper limit of the conductivity value to the upper limit of the
analog output. For example, if you want the analog output to be 20 mA, when
the measured conductivity is 200uS/cm we select the 4-20 mA output for the
DAC and enter 200 in the “Conductivity High” window, then “Save”.
Conductivity Low(uS/cm)
Assign the desired lower limit of the conductivity value to the lower limit of the
analog output. In that case, if you want to 100uS/cm corresponds to 4 mA, you
need to select the 4-20 mA output for the DAC and enter 100 in the
“Conductivity Low” window, then “Save”.
Temperature High(C)
Assign the desired upper limit of the temperature value to the upper limit of the
analog output. For example, if you want the analog output to be 20 mA, when
the measured temperature is 95 C degree, it should be select the 4-20 mA
output for the DAC and enter 95 in the “Temperature High” window, then “Save”.
Temperature Low(C)
Assign the desired lower limit of the temperature value to the lower limit of the
analog output. Same operation as for the upper value, only the lower value
entered here.
16

10. CONFIGURATION OF THE PARAMETERS
Relay
Configuration of the relay output
Switching point
The switching value of the relay output
must be entered here.
Switching hysteresis: The switching
hysteresis of the relay output can be
specified as a percentage.
Example:
Relay switching mode: Cond_H
Switching point: 100μS/cm
Switching hysteresis: 10%
This means that 10% of 100μS/cm is
10μS/cm, subtracting 10μS/cm from
100μS/cm is 90μS/cm. When the
measurement reaches 100μS/cm, the
relay turns on and until the conductivity
drops below 90μS/cm, the relay
remains on.
Relay switching mode
Configure the relay output. From the drop-down window,
select the mode in which you want to use the relay output (Cond_H, Cond_L,
Temp_H, Temp_L, TC Cond_H, TC Cond_L)
Example: Select Cond_H and when the conductivity measured value
(uncompensated value) exceeds the value entered in the Switching point
window, the relay switches. If the Cond_L mode is selected, the measured
conductivity value (uncompensated value) must be less than the value entered
in the Switching point window for the relay to switch. Temp_H and Temp_L
work just like Cond_H and Cond_L, only it switches based on the temperature
measurement value. TC Cond_H and TC Cond_L takes the temperature
compensated value into account for switching.
17

10. CONFIGURATION OF THE PARAMETERS
Temperature
Configuration of the temperature probe
Sensor Type
Here it can be selected the type of the
temperature sensor used between:
• Pt100
• Pt200
• Pt500
• Pt1000
• NTC10000
Modbus
Configuration of the modbus
Address
It can have an address up to 255
Baud rate
From 4800 to 115200
Parity
ODD or EVEN
Stop bit
ONE or TWO stop bits
18
From
To
Name
Format
0x0000
0x0001
Conductivity
32bit Float
0x0002
0x0003
Conductivity TC
32bit Float
0x0004
0x0005
Temperature
32bit Float
0x0006
0x0007
Impedance
32bit Float
Input Registers
NTC_Beta
This value is given by the manufacturer of the sensor. Applied when NTC10000
sensor type selected.
Temperature Offset
Fine tuning for temperature measurement.

10. CONFIGURATION OF THE PARAMETERS
Calibration
Wire resistivity compensation
The resistance value of the conductivity
probe wire must be specified. Entering
this value correctly will affect the result
of the temperature measurement.
Wire capacity compensation
If non-automatic cable capacity
compensation is used, the impedance
value measured with a dry probe must
be entered here. This eliminates the
effect of cable capacity on the
measurement.
TC compensation constant
• Acids: 1.0 - 1.6% /°C
• Bases: 1.8-2.2% /°C
• Salts: 2.2 - 3.0% /°C
• Drinking water: 2.0% /°C
• Ultra pure water: 5.2% /°C
Reference fluid
If the probe K factor is not specified, the meter can be calibrated using a reference
fluid. This value should only be entered during calibration, otherwise it will result a
false calibration and the measurement will not be real. When the conductivity probe
is in the reference fluid at 25 degrees Celsius,you can enter the value of the
reference fluid and calibrate the instrument by pressing the Send button. After this
operation you can see, that the value of the K factor has changed.
19
Changing these datas, need to consulting a specialized person.

10. DEFAULT CONFIGURATION
20
To reset the transmitter to factory settings, it can be performed
by turning off the device, then restart it. When it starting up, the
blue light starts blinking. During the blinking time, needed to
press the configurator button and all the saved datas will be
resetted.
To perform the resetting, follow the steps below.
Step 1
Disconnect the transmitter from the power source. It has to turn
off.
Step 2
Reconnect the power supply.
Step 3
At this step, need to be quick, because from the moment as it
get powered up, 3 seconds is given to push and hold the
WiFi/Init button for 2 seconds to reset the device to the factory
values.