Centrifugation; Centrifugation With Preselected Time; Continuous Operation; Short-Time Centrifugation - Hettich EBA 20 S Mode D'emploi

11

Centrifugation

When the centrifuge is running, according to EN / IEC 61010-2-020, no persons, dangerous substances or
objects may be within the safety margin of 300 mm around the centrifuge.
If the permissible weight difference is exceeded within the rotor loading, the drive switches off during the run-
up time, and error -3- is displayed (see chapter "Faults").
The centrifugation run can be interrupted at any time by pressing the key
The time and speed can be changed during the centrifugation run, with the keys
If the key or is kept pressed, the value changes with increasing speed.
After a centrifugation run, the display flashes until the cover is opened or a key is pressed.
If the symbol " " (lid closed) and " " (lid open) flashes alternately in the rotation indicator
centrifuge can only be continued after opening the lid.
•
Switch on the mains switch (switch position "Ι").
•
Load the rotor and close the centrifuge cover.
11.1

Centrifugation with preselected time

•
Set the desired speed with the keys
•
Set the desired time with the keys
•
Press the key . The rotation indicator
START
The time is displayed in minutes. The last minute is counted down in seconds.
When the time is displayed in minutes, a point flashes next to the number.
•
After expiry of the time or if the centrifugation run is terminated by pressing the
down until stationary.
During the centrifugation run the rotor speed and the remaining time are displayed.
11.2

Continuous operation

•
Set the desired speed with the keys
•
Set the time to zero with the key
•
Press the key . The rotation indicator
START
The first minute is counted up in seconds, and then the time is displayed in minutes.
When the time is displayed in minutes, a point flashes next to the number.
•
Press the key to end the centrifugation run. The rotor is slowed down until stationary.
STOP
During the centrifugation run the rotor speed and the expired time are displayed.
11.3

Short-time centrifugation

•
Set the desired speed with the keys
•
Keep the key pressed. The rotation indicator
0.
The first minute is counted up in seconds, and then the time is displayed in minutes.
When the time is displayed in minutes, a point flashes next to the number.
•
Release the key again to end the centrifugation run. The rotor is slowed down until stationary.
During the centrifugation run the rotor speed and the expired time are displayed.
beneath the speed indicator.
beneath the time indicator.
appears while the rotor is turning.
beneath the speed indicator.
beneath the time indicator. "--" is displayed.
appears while the rotor is turning. The time count starts from 0.
beneath the speed indicator.
appears while the rotor is turning. The time count starts from
.
STOP
.
, operation of the
key, the rotor is slowed
STOP
EN
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