Leica Biosystems CM3050 S - Manual (Page 31)

31 Leica CM3050S – Cryostat
The automatic defrost cycle takes place once
every 24 hours at the selected defrost time.
7. Duration of defrost cycle:
Press key until menu item ‘Defrost pe-
riod’ is displayed:
• Use defrost keys ( or ) to adjust de-
frost time. (Only if necessary - see below).
Important information for setting the
defrost parameters
Starting time of defrost cycle:
We recommend to program the auto-
matic defrost cycle for a time outside
regular working hours as a period of
4 hours should pass after the defrost
cycle before work with the instrument
is resumed (see also chapter 5.7.1 ‘Au-
tomatic chamber defrost cycle’).
Defrost cycle duration:
The duration of the chamber defrost
cycle is set to 8 minutes in factory.
This setting should only be changed,
if the evaporator is not completely
de-iced during the 8-minute cycle.
In such cases, increase the defrost
cycle duration gradually until the the
evaporator is ice-free after defrosting.
The selected defrost cycle duration is
valid for both automatic and manual
chamber defrost cycle.
4. Quick-freezing at maximum specimen
temperature* (instruments with speci-
men cooling only)
Press key until menu item ‘Fast object
freezing’ is displayed:
or
Press lock/unlock key to activate or de-
activate (ON/OFF).
5. Real time
Press key until menu item ‘Time’ is dis-
played:
• Use arrow key ( or ) to set real time.
Setting minutes as well as hours in 1-min-
ute steps. Holding arrow button increases
scrolling speed!
6. Starting time of automatic defrost cycle:
Press key until menu item ‘Defrost time’
is displayed:
(Time on display = start time of defrost
cycle)
• Use arrow kes ( or ) to select the de-
sired defrost start time.
5. Operation
*) with 90° prism - see also chapter 5.5.2.
F A S T O B J F R E E Z I N
O F F
F A S T O B J F R E E Z I N
O
N
T I M E 1 0 : 2 3
D E F R T I M E 4 : 3 0
D E F R O S T P E R I O D
C H A M B E R : 0 8 M I N