Thermo Scientific 15808722, Instruction Manual

Page: 17 / 37

Centrifuge GT 2/2R Operation | 13
Imbalance indicator
If a load is imbalanced, this will be indicated at speed higher
than approx. 300 rpm by the message "Imbalanced load".
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, refer to the
section
Troubleshooting by User
.
Stopping the centrifugation
program
With preset running time
Usually the running time is preset and you only have to wait
until the centrifuge stops automatically when the preset time
limit expires.
As soon as the speed drops to zero, the message END will
appear in the display. By pressing the OPEN key
, you can
open the lid and remove the centrifuge material.
You can also stop the centrifuging program manually at any
time by pressing the STOP key
.
Continuous operation
If you selected continuous operation (Refer to the section
Continuous operation
), you will have to stop the centrifuge
manually. Press the STOP key on the control panel. The
centrifuge will be decelerated at the designated rate. The
message "END" will illuminate, and after pressing the key
OPEN
, the lid will open and you can remove the
centrifuged material.
Temperature Adaptation
during Standstill
The temperature cannot be adapted until the rotor has been
positively identified; the speed display will then show END.
When the rotor is not recognized (lid closed and START key
not yet pressed, speed display "0"), the centrifuge
responds by ensuring that the sample cannot freeze
regardless of the rotor being used.
Short-term Centrifugation
For short-term centrifuging, the Centrifuge GT 2/2R has a
PULSE- function.
By holding down the PULSE key , spinning will start and
continue until the key is let go.
The centrifuge accelerates and brakes at maximum power.
Any rpm or RCF entered beforehand is overridden.
Note:
The centrifuge accelerates to maximum speed, regard-
less of which rotor was installed.
Check carefully whether you have to maintain a certain speed
for your application.
During the acceleration process, time is counted forwards in
seconds. The reading stays displayed until the centrifuge lid is
opened.
Removing the Rotor
To remove the rotor, proceed as follows:
1. Open the centrifuge lid.
2. Grab the rotor handle with both hands and press against
the green Auto-Lock key. At the same time, pull the rotor
directly upwards with both hands and remove it from the
centrifuge spindle. Make sure not to tilt the rotor while
doing this.
OPEN
STOP
STOP
OPEN
START
PULSE