Burkert Type 8709 - Handbuch (Seite 3)

8
note!
Electrostatic sensitive components / modules!
The device contains electronic components which react
sensitively to electrostatic discharge (ESD). Contact with
electrostatically charged persons or objects is hazardous
to these components. In the worst case scenario, they
will be destroyed immediately or will fail after start-up.
Observe the requirements in accordance with EN •
61340-5-1 and 5-2 to minimize or avoid the possibility
of damage caused by sudden electrostatic discharge!
Also ensure that you do not touch electronic components
•
when the power supply voltage is present!
The LFC / LFM Types 8718, 8719 / 8708, 8709
were developed with due consideration given to
the accepted safety rules and are state-of-the-art.
Nevertheless, dangerous situations may occur.
Failure to observe this operating manual and its operating
instructions as well as unauthorized tampering with the
device release us from any liability and also invalidate the
warranty covering the devices and accessories!
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General informaTion 5.
scope of supply 5.1.
Check immediately upon receipt of the delivery that the con-
tents are not damaged and that the type and scope agree
with the delivery note and packing list.
If there are any discrepancies, please contact us immediately.
germany
Contact address:
Bürkert Fluid Control Systems
Sales Center
Chr.-Bürkert-Str. 13-17
D-74653 Ingelfingen
Tel. + 49 (0) 7940 - 10 91 111
Fax + 49 (0) 7940 - 10 91 448
E-mail: [email protected]
international
Contact addresses can be found on the final pages of the
printed operating instructions.
And also on the internet at:
www.burkert.com Bürkert Company Locations
english
10
Warranty 5.2.
This document contains no promise of guarantee. Please
refer to our general terms of sales and delivery. The war-
ranty is only valid if the LFC / LFM Types 8718, 8719 /
8708, 8709 are used as intended in accordance with the
specified application conditions.
The warranty extends only to defects in the
LFC / LFM Types 8718, 8719 / 8708, 8709 and its
components.
We accept no liability for any kind of collateral
damage which could occur due to failure or mal-
function of the device.
information on the internet 5.3.
Operating instructions and data sheets for Types 8718, 8719,
8708 und 8709 can be found on the Internet at:
www.burkert.com Documentation Type
The complete documentation is also available on CD which
can be ordered by quoting part no. 804 625.
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sysTem descriPTion 6.
General description 6.1.
The LFC / LFM Types 8718, 8719 / 8708, 8709 are
devices for controlling or measuring the flow-rate of liquids
in process technology.
The devices are specified for the control and measurement
of low flow-rates.
lfc, liquid flow controller 6.1.1.
The actual flow-rate value supplied by the integrated
sensor is compared in the digital control electronics with
the set-point flow-rate value specified, via a standard signal
or field bus. The actual flow-rate value is also available as
an output, via a standard signal or field bus.
If there is a control deviation, the actuating variable output
to the proportional valve is modified via a control algorithm.
As a result, the actual flow-rate is adjusted to the set-
point value and the flow-rate can be held on a fixed value
or follow a predefined profile sequence, irrespective of
pressure changes or other disturbances in the system.
A low-friction proportional valve with a high response sen-
sitivity is used as an actuating element.
english
Type 8708, 8709, 8718, 8719