Leica CM1950 manual Manual defrosting of the specimen cooling

8.Working with the Instrument

Manual defrosting of the cryochamber

•Push the manual defrost button (with the melting snowflake) on the left over the key button to activate the defrost cycle of the cryochamber on demand.

•Activation is confirmed by an audible signal.

•Then, push the "+" or "-" button on the panel for the cryochamber temperature.

•The manual defrost cycle (12 min.) is activated.

•There is a flashing indication of the temperature of the cryochamber during the whole defrost cycle.

•If necessary, push the manual defrost button again to deactivate the manual defrost cycle.

•When the manual defrost begins, the specimen head adjusts to a tem- perature between -10°C and -5°C (reduction of ice formation). The specimen head cooling turns off. This is confirmed by the flashing of the decimal points on the panel for the specimen cooling.

•Ten seconds after the manual defrost cycle has been completed, the specimen cooling turns back on.

Before starting the defrost cycle, remove all specimens from the cryochamber!

Manual defrosting of the specimen cooling

•Push the manual defrost button (with the melting snowflake) on the left over the key button to activate the defrost cycle of the specimen head.

•Activation is confirmed by an audible signal.

•Then, push the "+" or "-" button on the panel for the specimen temperature.

•There is a flashing indication of the specimen temperature during the defrost cycle.

•For 15 minutes, the specimen head is adjusted to a temperature of 45°C.

•Subsequently, the instrument adjusts to the specimen temperature which

has been programmed prior to the manual defrost cycle.

•If necessary, push the manual defrost button again to deactivate the manual defrost cycle.

Press the key button, then the "+" button = specimen head on

Press the key button, then the "-" button = specimen head off

40 Operating Manual V1.1 – 05/2007