Leica CM3050 S Manuel D’Utilisation

31

Leica CM3050 S – 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 period’
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
automatic defrost cycle for a time out-
side 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 ‘Automatic 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 specimen
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 keys (

 or 

) to set real time.

Setting minutes as well as hours in
1-minute steps. Holding arrow button in-
creases 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 keys (

 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