Leica CM1950 User Manual

Leica CM1950 – Cryostat

Technical Data

Refrigeration system

CM1950 , 50 Hz

CM1950 , 60 Hz

Cryochamber

Temperature range

0°C to -35°C ± 5 K, adjustable in 1K increments,

0°C to -35°C ± 5 K, adjustable in 1K increments

at ambient temperature of 20 °C

ambient temperature of 20 °C

Cooling time to -25°C

approx. 5 h

Cooling time to -35°C

approx. 8 h

Refrigeration capacity

①

690 W

Cut-out pressure

25 bar

Safety factor

Refrigerant*

300 g (± 5 g) refrigerant R -404A*

Compressor oil*

0.6 l EMKARATE RL22S, ICI*

Defrosting of cryochamber

Automatic defrosting

Programmable:

Yes (hot gas defrost) Selectable time

Defrosting intervals

1 defrost in 24 h

or manual hot gas defrost

Defrost time:

12 minutes

Automatic shutoff

Defrost:

at -5 °C chamber temperature

Quick-freeze shelf

Minimum temperature:

- 42 °C (+ 5 K), at chamber temp. -35°C

Number of freezing stations:

15+2

Defrost

Manual hot-gas defrost

Peltier element

Number of freezing stations:

Max. temperature difference:

17 K, at chamber temp. of -35 °C

Specimen cooling

Temperature range

-10 to -50 °C ± 3 K

Refrigeration capacity

①

320 W

Cut-out pressure

25 bar

Safety factor

Refrigerant and quantity

at 230 V/50 Hz 140 g (± 5 g), refrigerant R-404A*

at 120 V/60 Hz 110 g (± 5 g), refrigerant R-404A*

at 100 V/50/60 Hz 110 g (± 5 g), refrigerant R-404A*

Compressor oil*

0.4 l alpha 22, Kyodo*

Defrosting of specimen head

Automatic defrost:

Manual defrost
Defrost time

15 min.

*) Refrigerant and compressor oil must be replaced by qualified, authorized service personnel only.

① acc. to CECOMAF: liquid temperature 45 °C, evaporation temperature: -25 °C