Proline Kryomats
76 Starting up YAUE0007 / 2/26/2009
− 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
(Ö 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.
)
− Not higher than 25 °C below the fire point of the heat transfer liquid used (Ö 6.2 and
6.3).
−
The setting range is rest
ricted to 5 °C above the upper limit of the working
temperature range (Tih Ö 7.6.2).
¾¾
− If the bath temperature rises above the overtemperature cut-off:
1. Alarm sounds as dual-tone signal.
2.
rDLMO for overtemperature appears in the display.
3. The red LED
above the fault triangle flashes.
Æ Heater switches off on both poles,
Æ 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
rDLMO is shown in the display:
− Unlock with the
key.
Unlocking is not possible on the Command control element!
)
− Before longer periods of unsupervised operation, the overtemperature protection
should be checked. To do this:
Overtemp. cut-off
8/
°C
Overtemp. alarm
rDLMO
°C
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