Avantik QS11 - Defrosting the Evaporator; Interrupting a Defrosting Cycle

Avantik Cryostat QS11 / QS11UV
Avantik
36 Commerce St.
Springfield NJ 07081 / USA
387 779 - English
18
2-3-2 DEFROSTING THE
EVAPORATOR
Every 24 hours the evaporator in the rear part
of the microtome chamber is defrosted
automatically.
During a defrosting process, the display shows
a temperature with the letter H. This
temperature refers to the heating of the
evaporator and not to the temperature of the
cooling chamber, which is normally shown.
This value, however, is of no importance for
the operation of the instrument.
Press the button DEFR TIME (fig. 8.4) and the
set defrosting time is shown for approx.
2 sec. on the display (fig. 8.1). It is advisable to
set the time of the defrosting process not
during routine working time. To change the
starting time of defrosting at intervals of
15 minutes
, simultaneously press the button
D
EFR TIME (fig. 8.4) and the button UP (fig.
8.2) or DOWN (fig. 8.3). Defrosting can only be
carried out at the set defrosting time, if the real
time is set correctly (see 2-6-4).
After finishing the adjusting process, the
display shows the set temperature of the
microtome chamber after two more seconds.
Note:
An immediate defrosting cycle can be
released at any time. For this, press
the button DEFR TIME (fig. 8.4) and
additionally the reset button (fig. 2.11).
2-3-3 INTERRUPTING A DEFROSTING
CYCLE
If needed, the daily defrosting can be
interrupted or cancelled. Press the button
INTERRUPT (fig. 8.5), the LED in this button
lights up. If the function INTERRUPT is chosen
during the defrosting period, the LED blinks for
the rest of t
he suppressed defrosting process.
A
cancelled or interrupted defrosting process
must be repeated later on, as otherwise the
evaporator will cover completely with frost and
cannot cool any more.
For this, press the button (fig. 8.5) again to turn
off the function INTERRUPT (LED is off). The
next defrosting process will then be started
when the next pre-selected defrosting time is
reached.
Fig. 8
MEMO
CHAMBER TEMPERATURE ° C
DOWN
DEFR
TIME
INTER
RUPT
UP
P
1
3 2
4 5