Adjustable Parameters; Preselecting Centrifuging Parameters Or Changing Them During Operation; Speed; Of Denser Substances - Hettich EBA 20 Bedienungsanleitung

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Adjustable parameters

•

Speed

•
•
Adjustable up to max. speed of the rotor used.
•
Time
•
•
or
"—" •
or
•
•
Braking force
•
13

Preselecting centrifuging parameters or changing them during operation

13.1 Speed
Each time the and arrow keys are activated, the speed is changed by 100 rpm. If an arrow key is kept pressed
down for longer, the speed is changed at an increasing rate.
If the speed is changed during operation, this becomes effective immediately, i.e. the speed is adjusted.
13.2

- of denser substances

The rotors are designed to centrifuge substances up to a maximum mean homogenous density of 1.2 kg/dm
rotating at the stated speed.
Denser substances must be centrifuged at lower speed.
The permissible speed can be calculated using the following formula:
e.g.: RPM 4000, density 1.6 kg/dm
If in doubt you should obtain clarification from the manufacturer.
13.3

Run time

Each time the and arrow keys are activated, the run time is changed by 1 minute. If an arrow key is kept pressed
down for longer, the run time is changed in minute steps, at an increasing rate.
If the run time is changed during operation, this becomes effective immediately, i.e. the remaining run time is
adjusted.
If an arrow key is activated during operation, the run time or speed is adjusted accordingly.
13.3.1

Continuous operation

The centrifuge can be operated in continuous operation. Continuous operation is set by pressing the
until " – " appears in the run time display. Operation is only stopped by activating the
13.3.2

Pulsed operation

For brief centrifuging. The rotor turns at the preselected speed as long as the
min. speed 500 rpm
max. speed 6000 rpm
in steps of 100 rpm
min. preset time 1 min
max. preset time 99 min
in steps of 1 min
continuous operation
pulse ( short-time )
full braking effect
low braking effect
Reduced speed (n ) =
red
Greater
3
1.2
n = x 4000
red
1.6
1.2
x Rated speed
density
= 3464 RPM
key.
.
key is pressed down.
EN
3
when
arrow key
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