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 conguration
• 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 specic software on Windows or Linux platform
Technical Data
Temperature measurement
Number of channels congurable, 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 efcient 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.
Technical changes reserved
0141 0316-155 18.08.2015
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon +49 771 83160 | Fax +49 771 831650 | info@bb-sensors.com | bb-sensors.com
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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 congured 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.
Technical changes reserved
0141 0316-155 18.08.2015
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon +49 771 83160 | Fax +49 771 831650 | info@bb-sensors.com | bb-sensors.com
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