R O P E X
R O P E X
R O P E X
R O P E X
INDUSTRIE - ELEKTRONIK GmbH
Page 2
1. APPLICATION AND SHORT DESCRIPTION
As all other
, this unit is used to control
the temperature of heating elements (heatseal bands,
beaded bands, cutting wires, etc.) by monitoring the
resistivity of the heating elements. Precision
measurement together with high response produces
perfect temperature control during the film sealing
processes. With a correctly installed system, the
temperature is controlled with an accuracy of ±3%.
By changing settings, this controller can be used to
control heating elements with a range of resistances from
a few milliohms to several ohms. Therefore, this universal
controller may be used in a variety of general applications
for controlling the heatseal elements in:
vertical and horizontal f/f/s machines
pouch filling and sealing machines
film wrapping machines
pouch making machines
group packaging machines, etc.
The controller,
have all the known
functions of the RES-200 series, plus two digital timers,
sealing time and cooling time. This eliminates additional
external usage of timers to control heat impulse timing
and jaw action.
This additional feature makes the controller very suitable
for use in:
hand operated and table top machines
heatsealing sealing presses
L-sealers
RES controllers
RES-241 / 242,
As shown in Section 5, a complete sealing station can be
controlled with this controller without using additional
electrical components.
All parameters related to the sealing phase, like time and
temperature, can easily be selected by use of the digital
switches on the front panel of the unit.
The desired values are entered according to the
appropriate units, i.e.
and/or
.
Numerous functional sequences can be programmed
with the dip switches mounted on side of the controller.
This allows the user to select the best program for any
specific heatsealing process.
Processes that are primarily temperature dependent can
be programmed, e.g. closing of the jaw only after full
sealing temperature has been reached; or opening of the
jaws only after the cooling to a pre-determined
temperature has been reached.
(see Section 4: Timing Functions Programming).
The cycle sequence can be observed during operation by
means of the analog temperature meter and the LED´s
for heating and cooling.
Both the
and
controllers are identical
with the exception of the "alarm function" that is contained
only in the Model RES-242.
°C
sec
RES-241
RES-242
2.
FUNCTIONS OF THE RES-241 / 242
CONTROL FUNCTIONS
The controller operates in two different modes: monito-
ring or controlling.
If there is
, the controller will only
monitor the resistance of the heating element without
raising the temperature. Resistance monitoring is
accomplished by means of short low power pulses every
10 cycles of the line frequency. It is in this mode that the
"Z" calibration is performed. In the monitoring mode, the
"ON" LED blinks red. When a START signal is applied,
LED "ON" becomes steady state red.
no START signal
The controller then goes into the regulating mode and
increases the temperature of the heating element to the
desired set point as rapidly as possible.
The maximum secondary voltage is initially supplied to
the heating element and then subsequently reduced by
the phase control as the preset maximum temperature is
approached.
A high sampling rate together with virtually instant
feedback gives the controller an instantaneous response
capability.
2.1
