2
13
6
7
Excess Temperature Protection
30
14.1.1 Setting the excess temperature
The cut-off point is set with the excess temperature dial 13
with a rough scale of temperature values arranged around
it. This scale, of course, can only serve as an approximate
setting means for this cut-off point. However, the cut-off point
can be determined to act exactly if the following procedure
is adhered to:
If for instance a bath liquid has a flash point of 60
°
C the unit
should cut off after reaching 35
°
C at the latest:
1
First set the desired set value “
” using keys 7 (
↑
) or
8 (
↓
) to exactly 35
°
C.
2
After the circulator has reached this temperature, turn
the excess temperature dial 13 backwards very slowly
(to the left) until the unit cuts off (acoustic signal, fault
shown at display 6).
3
Then set the set temperature to the actual temperature
(< 35
°
C).
4
Reset the unit via the Reset key 2 after the heat transfer
liquid has cooled down somewhat.
⇒
The unit can now be used for temperatures below
35
°
C. As soon as 35
°
C is reached, it is securely
switched off.
14.1.2 Testing the cut-off point
Set the set temperature to a higher value than 35
°
C, set the
unit to heat up and watch the digital display or thermometer.
The value indicated when the alarm goes off is the real cut-
off temperature. The reaching of the cut-off point is indicated
at the display by the following message:
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