Technical data – Leica Biosystems CM1950 User Manual
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Leica CM1950 – Cryostat
3.
Technical Data
Refrigeration system
CM1950, 50 Hz
CM1950, 60 Hz
Cryochamber
Temperature range
0 °C to -35 °C ± 5 K, adjustable in 1 K increments,
at an ambient temperature of 20 °C
0 °C to -35 °C ± 5 K, adjustable in 1 K increments
Ambient temperature of 20 °C
Cooling time to -25 °C
approx. 5 h
approx. 5 h
Cooling time to -35 °C
approx. 8 h
approx. 8 h
Refrigeration capacity
690 W
690 W
Cut-out pressure
25 bar
25 bar
Safety factor
3
3
Refrigerant*
300 g (± 5 g), refrigerant R-404A*
300 g (± 5 g), refrigerant R-404A*
Compressor oil*
0.6 l EMKARATE RL22S, ICI*
0.6 l EMKARATE RL22S, ICI*
Defrosting of cryochamber
Automatic defrosting
Programmable
Yes (hot gas defrost), selectable time
Yes (hot gas defrost), selectable time
Defrosting intervals
1 defrost in 24 h
or manual hot gas defrost
1 defrost in 24 h
or manual hot gas defrost
Defrost time:
12 minutes
12 minutes
Automatic shutoff
Defrost
at a chamber temperature of -5 °C
at a chamber temperature of -5 °C
Quick-freeze shelf
Minimum temperature
-42 °C (+5 K), at chamber temp. -35 °C
-42 °C (+5 K), at chamber temp. -35 °C
Number of freezing stations
15+2
15+2
Defrosting
Manual hot gas defrost
Manual hot gas defrost
Peltier element
Number of freezing stations
2
2
Max. temperature difference
17 K, at chamber temp. of -35 °C
17 K, at chamber temp. of -35 °C
Specimen cooling
Temperature range
-10 to -50 °C ± 3 K
-10 to -50 °C ± 3 K
Refrigeration capacity
320 W
320 W
Cut-out pressure
25 bar
25 bar
Safety factor
3
3
Refrigerant and quantity
at 230 V/50 Hz 130 g (± 5 g), refrigerant R-404A*
at 100 V/50/60 Hz 140 g (± 5 g), refrigerant R-404A*
at 120 V/60 Hz 140 g (± 5 g), refrigerant
R-404A*
Compressor oil*
0.4 l alpha 22, Kyodo*
0.4 l alpha 22, Kyodo*
Defrosting of specimen head
Automatic defrosting
No
No
Manual defrost (defrost time)
15 min.
15 min.
in acc. with CECOMAF: Liquid temperature 45 °C, evaporation temperature: -25 °C
*) Refrigerant and compressor oil must be replaced by qualified, authorized service personnel only!