MG TR-EVO, Инструкция по эксплуатации, Страница: 5 / 24

Transformer
Technical data:
-Single-phase, pulse transformer with dual safety insulation according to
standards ISO/EN 61558
-Variable dimensions from mm. 122x95x108
-Variable weight starting from 4.3Kg
DIN bar adapter
Technical data:
-Standard reference DIN EN5002250035
-Front dimensions 112x55mm.
-Total depth with mounted device 155mm.
-Metal an PVC made.
Operation
Principles
The temperature controller adjusts the temperature of a heating element without using probes, but
by basing itself on the variation characteristics of the resistance, on temperature variation, which
is characteristic of each heating element. Measuring the voltage and current sent to the heating
element enables calculation of its resistance and by comparing it with that of the cold detected
element during the "tuning" phase, the temperature can be found on measurement. Based on these
calculations, the power necessary to bring or maintain the temperature set is calculated and a solid
state switch is activated to provide the necessary power to the heating element. Thanks to the high
speed with which this measurement is taken (50 times per seconds) very fast adjustment with
good temperature stability of the heating element is possible. Heating times of 150ms. are normal
for this equipment and no particular measures are required to reach them. At the same time, the
temperature can be kept constant also in very low power request conditions, allowing heating to
be kept continuously on.
Operating modes
The temperature controller can work autonomously using the integrated display and keypad, or
can be connected to a PLC control device or PC using an EIA/TIA485 interface, or can be
adjusted by external analogue voltage or by a panel potentiometer.
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