4
Operation
Centrifugation
4-8
Multifuge 4KR
Thermo Scientific
Changing the Settings during a Run
You can change the set values during a run. Press either the key
or
below the display. The
value that is being changed flashes. When the new value is stored the actual value is shown in the
display.
Centrifugation
Once the rotor has been properly installed, the main switch has been turned on and the door has been
closed, you can start centrifuging.
Starting Centrifuge Program
Press the
key on the control panel. The centrifuge accelerates up to the set value. The time display
shows the remaining run time. If you have selected continuous operation the time display counts up.
If you have selected a value that is above the maximum speed or RCF-value the display will flash for 15
seconds between
rotor
and the maximum value for the installed rotor.
a. Please enter a new value. Within this period, it is possible to accept this value by again pressing
the
key. The centrifugation is then continued.
b. After 15 sec. the rotor will be decelerated. Always wait until the rotor has come to a stop
without braking.
By opening and closing the door you reset the message
rotor
.
After entering a permissible speed you can start again.
You cannot open the door as long as the centrifuge is running.
Imbalance Indicator
If a load is imbalanced, this will be indicated at speed higher than approx. 300 rpm. The display shows
the following message:
The run will terminate.
Check the loading and start the centrifuge once again. See the information on proper loading in the
rotor instruction manual. For information on troubleshooting, see section
“Troubleshooting by User”
on
page 6-3
.
