Unit descri
tion
4
3.3 Temperature indication, control, and safety circuit
The unit is provided with a 7-segment LCD-Display (3
½
places) with additional symbols for indicating
bath temperature and settings as well as operating states.
The setpoint is input and additional adjustments can be made using either two or three keys
A Pt 100 temperature probe is used for measuring the actual temperature and for control. A second Pt
100 serves as temperature probe for the safety circuit (overtemperature protection) which is independent
of the control function.
A low-level cut-out switches off the heating on both poles in order to prevent dry operation of the heater.
The pump is switched off through the electronics. The setting of the overtemperature cut-out is adjusted
with a tool on a potentiometer and is always limited to 5 °C above the operating temperature range.
All settings and fault messages are stored in the memory on supply failure or when the mains switch is
set to OFF.
The tubular heater is controlled from a modified PID controller through a triac circuit specially designed to
be unaffected by supply variations and interference.
3.4 Materials
All parts which come into contact with the bath liquid are made from high-grade materials appropriate to
the operating temperature. These are rust-free stainless steel, the plastics PPS, polycarbonate (bath 006
T, 012 T, 015 T, 020 T) and fluoride rubber.
4 Unpacking
After the unit and accessories have been unpacked they have to be examined for possible transport
damage. If there is any damage visible on the unit, the forwarding agent or the post office has to be
notified so that the shipment can be examined.
Standard accessories:
Bath cover E 103 only
Closing plugs on all bath/circulation thermostats
Warning label
on all immersion and bath/circulation thermostats
Operating Instructions on all immersion and bath/circulation thermostats
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