Lauda RP 3090 C, Руководство по эксплуатации

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
Setting the overtemperature cut-off: Recommended setting: 5 °C above
desired bath temperature.

Caution!! The overheat switch-off point T
max
is controlled by a system
functioning independently of the bath control. Setting of the nominal
temperature, however, can be limited via the functions T
ih
and T
il
(

7.6.2)
independently of T
max
.

The cut-off point is displayed in the LED display on pressing the key .
Changing the overtemperature cut-off point:

For safety, and to guard against unintentional adjustment, the key must
be held pressed during all the following entries. Now, briefly press . The
display flashes and the overtemperature cut-off can be set with the keys
or .

Quit the change mode by pressing for a few seconds or automatically
after 5 seconds, while you keep pressed.

This somewhat complicated procedure is intended to prevent unintentional
adjustment.


Set the overtemperature switch-off point T
max
below the flash point of the heat transfer liquid.

The setting range is restricted to 5 °C above the upper limit of the working temperature range
(Tih

7.6.2).


 If the bath temperature rises above the overtemperature cut-off:
1. Alarm sounds as dual-tone signal.
2.
tEMNP
for overtemperature appears in the display.
3. The red LED above the fault triangle flashes.

Heater switches off on both poles,

Pump and refrigerating unit are switched off electronically.

Rectify cause of fault.

Wait until the bath temperature has cooled below the cut-off point or set
the cut-off point higher than the bath temperature. When
tEMNP
is
shown in the display:

Unlock with the key.
Unlocking is not possible on the Command remote control!

 Before longer periods of unsupervised operation, the overtemperature protection should be checked.
To do this:
 Slowly lower T
max
, as described above.

Cut-off at the bath temperature should occur.
Overtemp. cut-off
90
°C
Overtemp. alarm
tEMNP
°C