Leica Biosystems CM1950 - Manual (Page 40)

40 Instructions for Use V 1.5 RevF - 08/2014
8. Working with the Instrument
• Turn the lamp on or off.
• This button activates or deactivates the manual defrost of the cooling
chamber, specimen head or freeze shelf. (For more detailed handling
instructions, refer to the chapter on "Working with the Instrument" in
these Instructions for Use.)
• Pressing the key button for approx. 5 sec. locks the entire keyboard (the
LEDs in the clock go out).
• Pressing the key button briefly, then the "-" key in the specimen head
control panel field, switches off the specimen head.
• Pressing the key button briefly, then the "+" key in the specimen head
control panel field, switches the specimen head back on.
Programming the temperature of the cryochamber
• The temperature of the cryochamber is set and indicated on the control
panel marked with the cryostat symbol.
The actual temperature is the standard indication.
Briefly pressing the "+" or "-" button displays the target temperature.
Set the desired value via the "+" / "-" buttons. Pushing the "+" or "-" button
for more than 1 sec. increases or decreases the chamber temperature
continuously.
The actual value will be indicated 5 seconds after finishing the program-
ming.
Fig. 42
The instrument must be switched on at least 5 hours before the planned use.
8.3 Configuring the parameters
Refer to Chap. 10 "Temperature selection chart" for a table with guide values. The tem-
perature values given there are based on experience, but are intended solely as guide
values, as any tissue may require particular adjustments.