Use
Page 6
RES-5007
Version 1
Careless, uncontrolled disposal can cause damage to the environment and human health. By ensuring that your
product is disposed of or recycled in a responsible way, you can help protect the environment and human health.
This device must not be disposed of as residual waste!
3
Use
This RESISTRON
®
temperature controller is part of the “Series 5000”, whose main characteristic is micropro-
cessor technology. All RESISTRON
®
temperature controllers provide temperature regulation of heating elements
as are used in a variety of foil sealing processes.
The most common heating elements include:
• ribbon cables (straight and contoured)
• clincher bands
• beaded bands
• cutting wires
• heat-sealing blades
• soldering bows
The main application area is sealing or cutting of thermoplastics using the thermal impulse process.
The most common application areas are:
• vertical and horizontal form-fill-seal machines (VFFS and HFFS)
• bagging, filling and sealing machines
• film-wrapping machines
• bag-production machines
• group packaging machines
• foil sealing devices
• spout and hose sealing
• and much more
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Functional principle
The resistance of the heating element, which changes with temperature, is measured by means of current and
voltage measurement, displayed and compared with the specified setpoint value. Measurements are made
50 times per second in a 50 Hz network, 60 times per second in a 60 Hz network.
The primary voltage of the impulse transformer is adjusted following the leading edge principle if the measured
values deviate from the setpoint value. The related current change in the heating element results in a rise in tem-
perature and change of resistance. The change in resistance is measured and evaluated by the RES-5007. The
temperature controller adjusts the control variables according to the change and the set setpoint.
Even the smallest thermal loads on the heating element are recorded and can be quickly and precisely corrected.
Measurement of pure electric variables, together with the high measurement rate, result in a highly dynamic ther-
moelectric control circuit. The principle of primary-side transformer control proves to be especially advantageous
as it permits a very large secondary current range with low power loss. This permits an optimal adjustment to the
load and thus the desired dynamics with extremely compact device measurements.
!
