Internal temp.
External temp.
Set value
°
C
°
C
°
C
22.68
21.20
40.00
17:00:00 17.11.00
ALARM
OVER--Temp
!
Excess Temperature Protection
52
HAAKE Phoenix II P1
Version 3.07
15. Excess Temperature Protection
If this safety device is triggered:
•
The alarm indication on the display flashes
•
the message „excess temp“ appears on the display
•
An acoustic signal is sounded
•
all voltage conducting unit components (the heating
element, the pump motor and if available, the compres-
sor) are switched off immediately i.e. the safety circuit
transfers the unit to a stable, safe condition.
The fault cause must be identified and remedied.
After the fault has been eliminated the unit can be started
again by pressing the reset key.
When the fault has been eliminated the unit can be started
again by pressing the function key next to the release sym-
bol.
15.1 Excess temperature protection dial
It offers protection against dangers caused by an uncon-
trolled heating up of the heat transfer liquid above the de-
sired set temperature.
The cut-off temperature is adjusted with the excess temper-
ature setting dial.
Proper protection can only be guaranteed if the
cut-off point has been correctly set.
At the first start--up of the circulator the function of the excess
temperature protector has to be checked.
There are two main aims for correct setting:
•
Safety (primary importance):
Protection against ignition of the heat transfer liquid.
The cut-off point must be set at least 25
°
C
below
the
flash point of the bath liquid used.
•
Protection of the object to be temperature con-
trolled (secondary importance):
Additional
protection, e.g. of a biological sample. The
cut-off point should be set as close as possible to the
desired temperature value.
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