Safety and warning notes
Version 1
RES-430
Page 3
1
Safety and warning notes
This RESISTRON
®
temperature controller is manufactured according to DIN EN 61010-1. In the course of its
manufacture it passed through quality assurance, whereby it was subjected to extensive inspections and tests.
It left the factory in perfect condition.
The recommendations and warning notes contained in these operating instructions must be complied with, in
order to guarantee safe operation.
The device can be operated within the limits indicated in the "Technical Data" without impairing its operational
safety. Installation and maintenance may only be performed by technically trained, skilled persons who are familiar
with the associated risks and warranty provisions.
1.1
Use
RESISTRON temperature controllers may only be used for heating and temperature control of heatsealing bands
which are expressly suitable for them, and providing the regulations, notes and warnings contained in these
instructions are complied with.
In case of non-compliance or use contrary to the intended purpose, there is a risk that safety will be
impaired or that the heatsealing band, electrical wiring, transformer etc. will overheat. Ensuring
such compliance is the personal responsibility of the user.
1.2
Heatsealing band
A basic prerequisite for reliable and safe operation of the system is the use of suitable heatsealing bands.
The resistance of the heatsealing band which is used must have a positive minimum temperature
coefficient in order to guarantee trouble-free operation of the RESISTRON
®
temperature controller.
The temperature coefficient must be specified as follows:
e.g.
Alloy A20:
TCR = 1100 ppm/K
LEX3500:
TCR = 3500 ppm/K
The RESISTRON
®
temperature controller must be set and coded according to the temperature coefficient of the
heatsealing band.
The use of incorrect alloys with a too low temperature coefficient and incorrect coding of the
RESISTRON
®
temperature controller lead to uncontrolled heating and ultimately to burn-out of the
heatsealing band!
The heatsealing bands that were originally supplied must be identified by detail specification, part number or some
other means that will assure that replacement bands are identical.
1.3
Impulse transformer
A suitable impulse transformer is necessary to ensure that the control loop functions perfectly. This transformer
must be designed according to VDE 0570/EN 61558 (isolating transformer with reinforced insulation) and have a
one section bobbin. When the impulse transformer is installed, suitable shock protection must be provided in
accordance with the national installation regulations for electrical equipment. In addition, water, cleaning solutions
and conductive fluids must be prevented from seeping into the transformer.
!
!
TCR
10
4
–
×
10 K
1
–
≥
!
