b b sensors TLOG20 OPERATION MANUAL

OPERATION MANUAL

Temperature measurement system TLOG20
connections RS232, RS485, USB

DescriptionDescription

Characteristic features

• Up to 20 temperature measurement points
measuring range –55…+125 °C

• Use of temperature probe DALLAS-Sensors type 18B20, 18S20

• Three wire, parallel connection of sensors

• More than 60 meter lead length

• 0.06 °C resolution

• Automatic conguration

• Inclusive simple Windows™ software

Areas of application

• Monitoring of cold storage or stock rooms,
in food industry

• Quality assurance

• Temperature measurement in buildings,

0567 0002 (RS232-Interface)
The variants with other inter­faces look slightly different

air conditioning, heating control, solar plants

• Dallas connection adapter for customer specic software on Win­dows or Linux platform

Technical Data

Temperature measurement

Number of channels congurable, 1 to 20

Measurement range -55...125 °C
Typical accuracy
for sensor DS18B20:

for sensor DS18S20:

Module

Dimensions modul

Operating temperature
Micro controller circuit

Operating voltage DC

Operating current approx. 40 mA

Interface

CE-Conformance
EMV-noise emission:
EMV-noise withstanding:

Accessories See ordering numbers on page 5

Article number Interface

0567 0002

0567 0003 RS485

0567 0004 USB 1.1, 2.0 and 3.0 compatible

conform wirh the used sensor
±0,5 °C (-10...+55 °C)
±2 °C (-55...-10 °C, +85...+125 °C)
±0,5 °C (0...+70 °C)
(see curve on page 2)

L785 x W40 x D21 mm

-10...+55 °C

9 V-15 V DC (mains plug)

4800 Baud, 8 Data bits,
No parity, One Stop bit

2004/108/EG
EN 61000-6-3:2011
EN 61000-6-2:2007

RS232

Windows Software

• Display of current temperature values

• Tabular representation of measured values

• Storing of data on hard disk

• Graphics Software as accessories

Operation

The product offers an efcient measurement and indication system for a

maximum of 20 temperature channels. DALLAS sensors of type 1820,
18B20 are used as temperature sensors and these are connected in paral­lel with a three wire lead. By using suitable cables, it is possible to achieve
larger lead lengths up to a few hundred meters.
The integrating member between PC and sensor network is a micro cont­roller module which is inserted at the serial COM-Port and makes the DAL­LAS-Touch-Bus ready through a six pole RJ12 plug connector. Suitable
connection cable or measurement sensor can be easily made or can be
readily procured from us.
The micro controller controls the dallas touch bus, manages the serial num­bers and picks up the temperatures of all connected sensors in a cyclic
manner. The currently measured values are sent as ASCII string to the con­nected PC. The display and graphical representation of measured values
(option) appears on the PC. An easy to use Windows software for display
of measured values and data representation is included in the scope of
supply.
More such modules can be operated with a PC, provided more free COM­ports are available at our disposal.If the program RECORDER is used, only
one module per PC can be read.

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OPERATION MANUAL

Temperature measurement system TLOG20
connections RS232, RS485, USB

WINDOWS-Software RECORDER

With the help of this program the measured values can be re­ceived through the interfaces and recorded on the PC. The
recorded data is compatible with any desired spread sheet
program, with which it is possible to further process the mea­sured values for statistical evaluation and interpretation.

Installation: The program should be rst installed under Windows 98,

Windows NT, Windows 2000, Windows XP, Windows Vista or Windows
7 system. Place the attached CD in your drive and run the program
“setup.exe” either by selecting “Run“ from the START menu or through
the windows explorer. Then follow the instructions of the installation
program. The setup program creates a new program group “HYG­ROSENS INSTRUMENTS” in the folder “programs”. After successful
installation, the software can be accessed and executed through the
START menu.
First time operation: Connect the temperature logger to a free serial
port on the PC. If the software runs for the rst time in the menu op­tion “settings” , select device type as “20Ch. Thermometer Templog
4800Bd” and also the serial interface used ( for example, COM1) under
“interface”. The remaining settings (Data rate, Parity, Start and Stop
bit) are automatically selected and need not be changed. In case the
connection hangs, refer to data communication in the terminal window.
Then select “OK” the current settings will be stored.

Please note that still micro controller adapter has to be congured as

per the connected sensors, before displaying the measurement values.
Data communication: The maximum allowable distance (between PC
and interface converters) depends on the model of the interface ad­apter.
USB-Interface: For USB-Interface the max. allowable length is restric­ted: As per standard, only 5 m are allowed. Due to high frequently
signals, this value should not be exceeded with the use of passive
connection cables. Only special USB cables may be used. For further
routes, special repeater-cables are available, which extend the allo­wable radius by 15 m in each case. Max. 5 such repeaters can be
cascaded. (No extend of delivery)
RS232-version: As per standard, the allowable cable length is 15 m. In
actual practice much longer routes, for example up to several 100 m,
can also be realised with low baud rates.
RS485-version: For very large distances between PC and sensor con­nection adapter, the RS485-version can be used. With this the connec­tion length up to 1200 m can be realised. On the PC side a RS485­interface adapter is required.

Data recording: First activate all the measurement channels for recor­ding by checking the channels. In ‘Text 1’, ‘Text 2’ and ‚Text 3‘, you can

enter a description as header of the data le. The selected separator

appears between the individual data elements. Enter the recording in-

terval in seconds in the Field “Every”. The data is recorded in the le

which is entered as path in the ‘Settings’ button. The recording begins
by pushing the ‘Start’ button.
EXCEL™: If you want to use EXCEL for evaluation, then operate the
control button EXCEL before start of recording, so that suitable decimal

separation characters and eld separators are inserted. The created
le is compatible with CSV-Format. In order to display the measured

data, you can use graphic tools, for example, the diagramassistant in
EXCEL™. However, other software can also be used to evaluate the
measured data.

Connection of Sensors

The Dallas temperature sensors of type 1820 has an internal coding
(serial-number) and can be operated along with several other sensors
on a three wire bus. The sensors are calibrated by the manufacturer.
For short connection lengths, there are no special requirements in re­spect of the connecting cable to be used. It is also recommended to
connect a ceramic capacitor of 100 nF from pin +5 V to pin GND at
each sensor.
The lead length with unshielded cables can go up to 60 m. To increase the

approach length, an additional Pullup-resistor of 1.5k to 10 k-Ω (from Pin

“DALLAS” to pin “+5 V”) can be added. With this, it is possible to increa­se the cable length up to 150 m or more, but with slightly lower accuracy
of measurement due to the increased temperature rise of the sensors.

If you are not able to make any data communication between PC and

the measuring device or the measuring adapter, then rst please check

the power supply and also cable connection to the PC.

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OPERATION MANUAL

Temperature measurement system TLOG20
connections RS232, RS485, USB

Format of Data transfer

Plug connector layout

Power supply: The articles 0567 0022 and 0567 0003 get their pow­er supply via socket-plug.The inner core of the 3.5 mm socket-plug
carries positive operating voltage of approximately 9 to 15 V DC. The
outer conductor is minus.
The power supply for article 0567 0004 is given via USB-port.
Sensor- plug connector: The Western plug connector 6P6 (RJ12) on
the logger side is as shown below (view of the cable i.e. the contact
surfaces of the plug):

1 GND
2 GND
3 Data
4 Data
5 +5V
6 +5V

The interface works at a data rate of 4800 Bd, 8 databits, no parity
and one stop bit. The transfer of useful data takes place in lines. All
characters are ASCII coded. All information is sent continuously wit­hout separation characters. In a line, only information of one channel
is transferred. At the end of the line, the last two ASCII characters are
sent for the check sum (8 bit CRC) of the current line. Each line closes

with the character ‘Carriage return’ ‘<CR>´. Several lines form a data-

block. A data-block can have the following contents, for example:

Automatic sensor search

The system should be congured once before rst time operation. For
this, rst all sensors are connected and operating voltage is applied.

• After pressing the ‘Conguration’ key on the board shortly for

three times (in each case, approximately pressing for 1,5 se­conds and then pausing for one second), the program goes into
Autosearch mode. The LED consecutively blinks three times in a
cyclic manner for short duration.

• If now the ‚Conguration‘ key is operated for at least 5 seconds,

the sensors connected on the bus are searched and the new con-

guration is stored in the controller´s memory. The process can as

often be repeated as desired. After the sensors are searched and

identied, the current temperature values appear on the screen.

• To exit from the Auto search mode, the operating voltage must be

switched off for a short while. The conguration remains stored.

• During execution of Autosearch-Function, the stored calibration
values are also deleted (see below).

The data block has following structure:

• A synchronization pattern for the beginning of a Data block. For

synchronization, the sequence ´@ <CR>´ is used.

• The conguration data (´Identier´) of a channel. The data line

begins with the character ‘I’, followed by the logical channel num-

ber, and then followed by conguration data and the Sensor serial

number. The line is closed with the check sum and the character
<CR>.

• The measurements of a channel. The data line begins with the

character ´V´, followed by the logical channel number, followed by

useful data. Only numerical measurement values and the check
sum (CRC), at the end of the line, are transferred. All other infor­mation like number format, number of characters, physical unit,

etc. are contained in the conguration data (sensor coding).

• The conguration data and measurement values follow the same

scheme for all other channels.

• The continuation character ´$´ <CR>´ is sent at the end of a data-

block

Structure of Cong Dataline

The conguration data line contains all information of the sensor wor-

king on the corresponding channel. The line has following structure:

• Character ´I´ at the beginning of the line.

• 8 bits (two ASCII characters) physical sensor coding. Based on
sensor coding, the number format, scale, physical unit and allo­wable range

• of values are specied. The sensor coding is 01 for the described
device.

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OPERATION MANUAL

Temperature measurement system TLOG20
connections RS232, RS485, USB

• 8 bits (two ASCII characters) Hardware coding (type of the mea­surement sensor). The Dallas sensors have the code number 10
for 1820 and 28 (HEX) for 18B20.

• 48 bits (twelve ASCII characters) serial number of the sensor:
Here, the serial number of Dallas-sensor is mentioned.

• 8 bits (two ASCII characters) CRC (check sum)

• ´ <CR>´ as line termination

Structure of Measured value Datalines

The measurement value data line contains the current measurements
of the sensor operating on the corresponding channel. All information
are represented in binary and is transferred ASCII coded format wit­hout separation characters. For the sensor marking 01, the line has
following structure:

• Character ´V´ at the beginning of the line

• 8 bits (two ASCII character) logical channel number

• 2 Bytes (4 ASCII characters) measurement data with 0.01°C re­solution. The hexadecimal value is to be converted into a decimal
number and to be divided by 100. With this, the temperature
value is obtained in °C with two decimals.

• 8 bits (two ASCII characters) check sum (CRC)

• ´<CR>´ as line termination

& Click, the window section can be enlarged and the time or tempe­rature axis can be scaled as desired. Besides the graphic view, the
representation is also possible in the form of a table. Cut & paste is
used for capturing measured data series into a spreadsheet program
(for example EXCELTM). All tables and graphic representations can
be printed out in colors. In addition, simple monitoring and controlling
functions are also integrated in the software. Limits can be set for each

channel. An acoustic signal (Wave le) is given when the values are

exceeded. Control of up to eight external devices is possible by a relay
card, to be attached at the parallel port or USB connector.

Software Prolab

Accessories (Optional)

Software “PCLOG“

The software screen are in English and German language. Tempera­ture values can displayed in °F or °C. Besides data storing on hard
disk, the software offers as most important feature the graphical re­presentation of all measured and recorded channels in the form of a
temperature Vs time chart (online scriber function). By means of Drag

With this software, professional measurement and control projects can
be realized in a simple, graphics based development platform. You can
simply draw the wiring diagram of the measurement circuit and do the
project design. Without any knowledge of programming, the measure­ment values of up to 16 temperature sensors can be easily used in the
measurement circuit.
Arithmetic and logical components take care of linking and proces­sing of the measurements. Modules like impulse generators, timers
and relay cards etc. provide extensive possibilities for control and re­gulation. Various instruments, scribers and tables serve as the sto­rage and representation of measured values and you can monitor the
measurement system with display and control elements. The system
is operated through a self designed front panel, on which you can ar-

range switches, potentiometers, displays, LED´s, instruments etc. The
software also enables compilation of the project into an EXE-le, which
can run without Prolab.

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OPERATION MANUAL

Temperature measurement system TLOG20
connections RS232, RS485, USB

Ordering numbers

Attention

Artciel Article no.

PC-measurement with RS232 interface 0567 0002

PC-measurement with RS485 interface 0567 0003

PC-measurement with USB interface 0567 0004

Accessories Ordering No.

Switching AC/DC adaptor, 12 V, 670 mA
(not needed for 0567 0004)

Screw type temperature probe M10,
cable 2 m

Temperature probe DS1820 with PUR cable
and RJ12 plug, 2 m

Temperature probe DS1820 with PUR cable
and RJ12 plug, 5 m

Distribution box 10- port with housing VERT-GEH

Software Prolab expert PROFILAB

For further information, please visit our homepage:
www.bb-sensors.com

NG-12V-670MA

DS1820-HD-2M­M10

DS1820-PUR-2M

DS1820-PUR-5M

Please avoid extreme mechanical and inappropriate exposure.

The device/product is not suitable for potential explosive areas and
medical-technical applications.

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