Ropex CIRUS UPT-6400 - Functions for Special Applications; Correction Factor; Channel Selection (CH0

Functions and settings | 8
VERSION 1 | EN-US CIRUS
®
UPT-6400 Page 79 of 104
8.8 Functions for special applications
8.8.1 Correction factor
The correction factor is used to adjust the temperature controller to suit the actual
properties of the machine (type of UPT heating element, specification of the pulse
transformer, length of connecting lines, cooling, etc.).
To determine the proper correction factor (menu Settings, menu number110), pro-
ceed as follows:
1. Make the following temperature settings.
Setpoint temperature: 160…180°C (menu number101)
Hold function: 2seconds (menu number203)
2. Trigger a release pulse of 0.2...0.3 sec.
Further information on triggering a release pulse can be found in sectionSTART
signal [}55].
3. Slowly increase the correction factor until the displayed hold value is the same as
the setpoint temperature.
At first, the correction factor should be the lowest value (25%) or the value recom-
mended in the application report minus25%.
Note
When the machine is operated or when changes are made to the setpoint or the seal-
ing time, always check the correction factor and adjust it if needed.
Time
T
emperature
Correction factor too high
Hold value
T
set
Correction
factor too low
Illustration31: Correction factor
8.8.2 Channel selection (CH0…CH2)
The temperature controller has separate memories for up to eight calibration data
records. A calibration data record contains the values determined by the temperature
controller during the AUTOCAL function.
Storing the calibration data records allows the operator to alternate between different
heat-sealing bands without having to run the AUTOCAL function every time the heat-
sealing band is changed. AUTOCAL has to be executed only when a new heating ele-
ment is connected.
Since different calibration values, AUTOCAL temperatures and temperature coeffi-
cients are stored in the temperature controller for this purpose, the desired calibration
data record 0…7 can be selected in the Heating element menu, menu num-
ber311.
Example
This function is useful, for instance, in applications where frequent changes in format
are necessary.
The tools can then be changed as required in order to handle the different formats.
A channel containing the relevant calibration data record is assigned to each tool.
Once all tools have been calibrated with a unique channel assignment, they can be
changed at any time simply by selecting the appropriate channel.
Tip
If the application does not require any format changes, the channel can remain set
to0.