Kendro SORVALL Biofuge primo, Operating Instructions Manual

Page: 39 / 79

Operation
35
Starting the centrifuge
Once the rotor is properly placed, the mains switch is
turned on and the lid is closed, you can start the centri-
fuge.
Press the "start" key
in the control panel. The cen-
trifuge accelerates to the preselected value. Simulta-
neously, the run time display starts going backward
from the preset time, at first giving the remaining run
time in minutes and upon reaching the last minute in
seconds (in continuous operation the time display goes
forward).
If a value exceeding the maximum permissible speed
or RCF of the respective rotor was entered, this is
indicated after the start of the centrifuge by the alter-
nately flashing messages "rotor" and the maximum
permissible value for the inserted rotor.
Within 15 seconds you may adopt this value by again
pressing the "start" key; the centrifugation is then con-
tinued. Otherwise the centrifuge stops, and you must
enter a permissible value.
You cannot open the lid during the run.
Unbalance detection
In case there is an unbalance in the rotor, this is indi-
cated at a speed slightly exceeding approximately 300
rpm by the message "bAL".
The run is terminated, and you may restart the centri-
fuge after correcting the error (check loading).
Changing the settings during the run
You can change all settings during a run. By pressing
once any one of the "set" keys in the control panel you
can switch from the actual to the setpoint mode.
The setting to be adjusted flashes and can then be
altered. Once the data input is finished and the display
has changed to the actual value display mode, the new
settings become operative.