System description
UPT-640 (as of SW 100)
5
3
System description
The basic design of the overall system is shown in the
diagram above.
CIRUS heating elements, and in particular UPT heating
elements, are high-performance systems which ope-
rate efficiently and reliably providing all the components
in the control loop are optimally tuned to one another –
and to the task at hand. Exact compliance with the
installation and wiring instructions is essential. The
system has been evolved and optimized by ROPEX
GmbH in an intensive development process. Users
who follow our technical recommendations will profit
from the unique functionality of this technology, which
reduces the customer's effort for installation, commis-
sioning and maintenance to a minimum.
3.1
Temperature controller
The controller calculates the resistance of the heating
element by measuring the current and voltage at a high
sampling rate (= line frequency), compares it with the
set point and – if the difference is not 0 – adjusts the
heating current with the help of a phase angle-con-
trolled transformer so that set = actual.
The fact that purely electrical variables are measured in
quick succession and the small mass of the heating
