Hettich AG, Seestrasse 204a, 8806 Baech, Switzerland Operator_Manual_Rotolavit II_und_Rotolavit II-S_en_rev2.5
Seite 41
10.3 Audible signal
The following audible signals are programmed:
2 second intervals if an error occurs
in 10 second intervals after the program has ended and the rotor has stopped.
The audible signal can be stopped by opening the lid or by pushing any button.
o The signal after completion of the program can be activated or deactivated in the following manner, if
the rotor is at standstill:
o To adjust the volume, go at the start screen and push the button for the system settings
(cha. 8.2, pos. 4)
o Adjust the volume by varying the slider at the bar (cha. 8.5, pos. 5), at the far left side, the audible
signal is deactivated.
o Select your preferred mode for the audible signal after the program is ended with only one beep or
with an endless interval of 10 seconds for one hour.
o Confirm it with the button save changes (cha. 8.5, pos. 6).
If an alarm or the program end beep is running then the standby mode will activate till after 60 minutes
instead of the normal 10 minutes, but the display will go to dark mode after 10 minutes instead of the
normal 5 minutes.
10.4 Relative centrifugal force (RCF)
The relative centrifugal force (RCF) is given as a multiple of the acceleration of gravity (g). It is a unit-free value
and serves to compare the separation and sedimentation performance.
These values are calculated using the formula below:
RCF = relative centrifugal force
RPM = rotational speed (revolutions per minute)
r = centrifugal radius in mm = distance from the centre of the turning axis to the bottom of the tube,
see cha. 16.1, Rotors and accessories.
The relative centrifugal force (RCF) stands in relation to the revolutions per minute and the
centrifugal radius.
10.5 Querying operating hours
Go into the system settings (start screen, cha. 8.2, pos. 4)
Go into the service menu (system settings, cha. 8.5, pos. 7)
RCF =
(
RPM
1000
)
2
x r x 1,118
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