15
The unit now starts and controls to the set value� When
the temperature has reached the set value and has be-
come constant, the “Set” LED (B) no longer flashes and
the following display appears�
The temperature measured by the unit appears on the
left hand side�
Input the calibration value from the reference mesuring
device (e�g� 80�2 °C) with the right knob (J)�
Confirm the value by pressing the right knob (J)�
Back to previous screen for input a new value by pressing
the left knob (K)�
Back
OK
The first point calibration is finished now�
Calibration of the other points is performed in the same
way�
Interface and output
The device can be operated in “Remote” mode via the RS 232
interface (11) or the USB interface (12) connected to a PC and
with the laboratory software Labworld
soft
®
�
Note:
Please comply with the system requirements togeth-
er with the operating instructions and help section included
with the software�
USB interface:
The Universal Serial Bus (USB) is a serial bus for connecting
the device to the PC� Equipped with USB devices can be con-
nected to a PC during operation (hot plugging)� Connected
devices and their properties are automatically recognized�
The USB interface can also be used to update firmware�
USB device drivers:
First download the latest driver from
IKA
®
devices with USB
interface from:
http://www.ika.com/ika/lws/download/usb-driver.zip.
Install the driver by running the setup file� Then connect the
IKA
®
device through the USB data cable to the PC�
The data communication is via a virtual COM port�
Configuration, command syntax and commands of the vir-
tual COM ports are as described in RS 232 interface�
RS 232 interface:
Configuration
- The functions of the interface connections between the
stirrer machine and the automation system are chosen
from the signals specified in EIA standard RS 232 in ac-
cordance with DIN 66 020 Part 1�
- For the electrical characteristics of the interface and the al-
location of signal status, standard RS 232 applies in accor-
dance with DIN 66 259 Part 1�
- Transmission procedure: asynchronous character transmis-
sion in start-stop mode�
- Type of transmission: full duplex�
- Character format: character representation in accordance
with data format in DIN 66 022 for start-stop mode� 1
start bit; 7 character bits; 1 parity bit (even); 1 stop bit�
- Transmission speed: 9600 bit/s�
- Data flow control: none
- Access procedure: data transfer from the stirrer machine to
the computer takes place only at the computer’s request�
Command syntax and format:
The following applies to the command set:
- Commands are generally sent from the computer (Master)
to the device (Slave)�
- The device sends only at the computer’s request� Even
fault indications cannot be sent spontaneously from the
device to the computer (automation system)�
- Commands are transmitted in capital letters�
- Commands and parameters including successive param-
eters are separated by at least one space (Code: hex 0x20)�
- Each individual command (incl� parameters and data) and
each response are terminated with CR LF (Code: hex 0x0d
hex 0x0A) and have a maximum length of 80 characters�
- The decimal separator in a number is a dot (Code: hex
0x2E)�
The above details correspond as far as possible to the recommendations of the NAMUR working party (NAMUR recommenda-
tions for the design of electrical plug connections for analogue and digital signal transmission on individual items of laboratory
control equipment, rev� 1�1)�
The NAMUR commands and the additional specific
IKA
®
co mmands serve only as low level commands for communication
between the device and the PC� With a suitable terminal or communications programme these commands can be transmitted
directly to the circulator equipment� The
IKA
®
software package, Labworld
soft
®
, provides a convenient tool for controlling
circulating equipment and collecting data under MS Windows, and includes graphical entry features, for pump motor speed
ramps for example�
The following table summarizes the (NAMUR) commands understood by the
IKA
®
control equipment�
