Loading The Rotor; Aerosol Tight Sealing Of Angle Rotors; Control And Display Elements; Control Panel Symbols - Hettich EBA 21 Bedienungsanleitung

EN
9

Loading the rotor

•
With swing-out rotors all rotor positions must be lined with identical hangers. Certain hangers are marked with
the number of the rotor position. These hangers may only be used in the respective rotor position.
•
The rotors and hangers may only be loaded symmetrically. For authorised combinations see Chapter
"Anhang/Appendix, Rotoren und Zubehör/Rotors and accessories".
•
In containers with rubber inserts, the same number of rubber inserts must always be among the centrifuge
containers.
•
Always fill the centrifuge containers outside of the centrifuge.
•
No liquid should be allowed to enter the centrifugal chamber during filling and swinging out of the hangers.
•
In order to maintain the weight differences within the centrifuge container as marginal as possible, a consistent
fill level in the containers is to be heeded.
•
The weight of the permissible filling quantity is specified on each rotor. This weight may not be exceeded.
10

Aerosol tight sealing of angle rotors

To ensure aerosol sealing the lid of an aerosol sealed angular rotor must be firmly closed.
This is performed with the help of the supplied spanner that is inserted through the borehole
in the rotary handle. If the rotary handle does not have a borehole then the lid must be firmly
closed by turning in clockwise direction.
For available aerosol tight angle rotors, please see chapter "Anhang/Appendix, Rotoren und
Zubehör/Rotors and accessories".
11

Control and display elements

See figure on page 2.
Fig. 2: Display and control panel
11.1

Control panel symbols

Unbalance display. The unbalance display lights up if the permissible weight difference within the rotor
loading has been exceeded.
Rotation display. The rotation display lights up during the centrifugation run as long as the rotor is turning.
Lid display. The lid display lights up if the lid is closed and locked. During the centrifugation run the lid
display is extinguished.
Operating errors or any occurring disturbances are symbolised in the display (see Chapter "Faults").
11.2

Control panel pushbuttons (keys)

Selection control key for selection of specific parameter.
The subsequent parameter is selected by every further keystroke.
By pushing the arrow keys the value of a previously selected parameter is increased or decreased. By
keeping an arrow key depressed the value is increased or decreased with increasing speed.
Start the centrifugation run. The rotation display
START
Acquisition of input and changes.
Stop the centrifugation run.
STOP
The rotor runs down with pre-selected brake step. The LED in the key lights up until the rotor stops.
Pushing the key twice triggers the EMERGENCY STOP.
Selecting the RCF display.
RCF
The LED in the key lights up.
Short-term centrifugation.
IMPULS
The centrifugation run is effected as long as the key is held down.
Storing and recalling programmes.
PROG
The subsequent programme is displayed by every further keystroke (1 - 2 - 3 - #).
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lights up.