R O P E X
R O P E X
R O P E X
R O P E X
INDUSTRIE - ELEKTRONIK GmbH
Page 5
The 'zero calibration' is the adjustment of the controller to
the resistance of the cold heatseal band at room
temperature (20°C, 68°F), assuming that the heatseal
band and the heatseal jaws are at room temperature,
using the "ZERO" potentiometer to set the needle of the
analog meter to "Z". Theoretically one could use another
reference point as long as the temperature of the heatseal
band is known.
Zero calibration is always performed in the measu-
ring mode; NO "START" signal may be given, and the
LED "ON" must be blinking!
3.2
Zero Calibration
Since the 'Z' point depends upon the size of the heatseal
element (length and cross section), the "Z" point should
be readjusted after each change of heatseal band,
especially when the heatseal band size is changed.
Also please see - Heatseal Element; Burn in Effect;
Operating Instruction
With the "START" signal activated, the regulating mode
(preset temperature vs. actual temperature) starts; the
controller switches from the measuring mode to the
regulating mode, heats up the heatseal element to the
preset temperature, and will maintain this precise
temperature as long as the "START" signal is on.
When the "START" signal is turned off, the controller
reverts to the measuring mode, and the heatseal element
will cool down. The cooling can be observed at the analog
meter.
The "START" signal can be given in three different ways:
The controller has
feature which will
prevent overheating of the heatseal element if the
controller has not been properly zero calibrated.
This happens if the meter needle is below the electrical
zero point. The heatseal band will not heat up even though
the "ON" LED indicates that the controller is in the
regulating mode.
The controller remains blocked, until the Z-Point has been
readjusted.
:
New heatseal elements will reduce their resistance after
the first burn-in. When the element is cooled off
completely, the needle may fall below the "Z" point, please
recalibrate, or the controller may not start.
(also see Heatseal Element; Burn in Effect)
START BLOCK
ATTENTION
3.3
Start Signal
100
200
300
0
Z
°C
Mechanical "0" point,
DO NOT CHANGE!
NO START
when needle
in this area.
pushing the "HAND" button on the front panel
closing a relay contact between terminals 2 and 7
applying a 24VDC signal across terminal 3 and 4
