Heraeus Baureihe 6000 Betriebsanleitung Seite 52

Upper/lower
temperature limit
controller
functioning in case
of excess and
insufficient
temperature
Thermal safety class 3.3
Protection of the heating oven, its environment and
the load against inadmissible excess and insufficient
temperature.
Only admissible for non-dangerous loads.
Function:
This controller complements the function of the tem-
perature limit controller as per thermal safety class 3.1.
With the flip switch, it can be turned on/off as desired and
offers additional protection against insufficient load
temperature if the controller fails.
Lower limit
safeguard
Upper limit
safeguard
Temperature limit controller with upper and lower limit
safeguard.
Setting of the upper limit safeguard:
Set the desired temperature for take-over in the event of
overheating as described under "temperature limit
controller" (excess temperature).
Setting of the lower limit safeguard:
Turn on the white switch after the set temperature has been
reached.
Pilot lamp in the switch lights up.
A slow turn of the knob will reveal the trigger position on
the dial of the lower limit controller (the orange warning
lamp lights up).
If you turn back the knob a little, the orange warning lamp
will go out.
Operational test:
The upper/lower limit controller should, at reasonable
intervals, be tested for proper operation. It is
recommended that this test be carried out roulinely by the
authorized operating personnel, e.g. prior to the start of a
longer work process.
WPPAP1/1D 368
50012336
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