Labnet Z400K High Capacity Centrifuge - Manual (Page 16)

16 E Z 400 K / March 1997
6. 6. 6. 6. 6. Safety facilities Safety facilities Safety facilities Safety facilities Safety facilities
6.1 Imbalance
In case of unequal loading of opposite buckets/tube racks or tube-holes, the
operation will be interrupted during the acceleration phase. The rotor will be
decelerated to standstill. Additionally the error message "ERROR" appears on the
preset display "speed".
If the actual display "speed" shows error no. 1, the difference in weight of the
samples is too big. Fill the tubes and load the rotor as described under point 3.
If the actual display "speed" shows error no. 2, there can be several reasons for:
- The imbalance switch is not adjusted correctly.
- The imbalance switch is defective.
6.2 Overtemperature
The overtemperature control system protects your samples as well as the centrifuge.
If the temperature in the rotor chamber of the centrifuge exceeds +50°C the preset
display "speed" will indicate "ERROR". At the same time error no. 10 will be
indicated on the actual display "speed". When the rotor is stationary, open the lid of
the centrifuge and let the temperature in the rotor chamber cool down to +30°C.
Then re-start the centrifuge.
Should the same failure occur again, please call our service.
Should the same failure occur again, please call our service. Should the same failure occur again, please call our service. Should the same failure occur again, please call our service. Should the same failure occur again, please call our service.
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5. 5. 5. 5. 5. Temperature Features Temperature Features Temperature Features Temperature Features Temperature Features
5.1 Temperature regulation
The temperature regulation with sensor, refrigeration system and processor control
system is spread in a way that the adjusted temperature gets reached within the
shortest possible time. This time depends on room temperature, temperature
preselection, type of rotor and speed. During this regulation time deviations on the
temperature indicator above or below the adjusted temperature may occure.
Nevertheless rotor as well as samples get cooled continuously at the fixed value.
If you are working with temperature sensitive samples a pre cooling of rotor,
eventually buckets and racks to corresponding temperature is necessary (see pre-
cooling 4.6.)
temperature
time
Temperature
display
Temperature samples