5.Operation
4.
Press key until menu item ‘Fast object freezing’ is displayed:
F | A | S | T |
| O | B | J |
| F | R | E | E | Z | I | N |
|
|
|
|
|
| O | F | F |
|
|
|
|
|
|
|
or
F A S T O B J F R E E Z I N
O N
Press lock/unlock key to activate or de- activate (ON/OFF).
5. Real time
Press key until menu item ‘Time’ is dis- played:
T | I | M | E |
|
|
|
|
|
|
| 1 | 0 | : | 2 | 3 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
•Use arrow keys ( 
or 
) to set real time. Setting minutes as well as hours in
6. Starting time of automatic defrost cycle:
Press key until menu item ‘Defrost time’ is displayed:
D | E | F | R |
| T | I | M | E |
|
|
| 4 | : | 3 | 0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(Time on display = start time of defrost cycle)
•Use arrow keys (
or 
) to select the de- sired defrost start time.
*) with 90° prism - see also chapter 5.5.2.
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:
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 |
•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
In such cases, increase the defrost cycle duration gradually until the the evaporator is
Leica CM3050 S – Cryostat | 31 |
