3� 5� 6� Pre-Tempering The Centrifugation Chamber; 3� 5� 7� Changing The Settings During The Run - VWR avantor Micro Star 21 Instruction Manual

3. 5. 6. Pre-Tempering the Centrifugation Chamber
Refrigerated centrifuges allow for pre-tempering, that is pre-warming or pre-cooling,
the centrifugation chamber and the empty rotor before the centrifugation run starts.
If necessary pre-temper your samples using proper equipment. The centrifuge is not
intended to be used to pre-temper your samples.
NOTICE Ventilated models cannot pre-temper the centrifugation chamber.
In order to pre-temp the centrifuge and the unloaded rotor proceed as follows:
Press the SNOWFLAKE button.
1.
An indicator above the SNOWFLAKE button indicates operation at the activated pre-
temp function.
2. Enter the desired value by pressing the up or down MINUS / PLUS buttons
the right display repeatedly, until the desired value shows. You increase or decrease
the temperature in steps of 1 °C.
3. Press START.
The rotor will be operated at optimal speed.
NOTICE When you press a different key than START you will quit the pre-temp function.
NOTICE If you wish to change the temperature of your samples, please consider that the time
required for temperature adjustment is prolonged. For critical applications you should take other
precautions to ensure that the desired temperature is actually reached and maintained.
3. 5. 7. Changing the Settings During the Run
You can change the settings during the run as follows:
1. Press one of the three MINUS / PLUS button pairs
The current value will switch into the pre-selecting value mode.
Operation
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in the control panel.
under