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17 Acoustic
Signal
The acoustic signal sounds:
Upon the appearance of a disturbance in 2 second intervals.
After completion of a centrifugation run and rotor standstill in 30 second intervals (only in centrifuges with
cooling).
The acoustic signal is stopped by opening the lid or pressing any key.
The signal after completion of the centrifugation run can be activated or deactivated in the following manner, if the
rotor is at standstill:
Hold down the key
SELECT
for 8 seconds.
After 8 seconds,
SOUND / BELL
appears in the display.
Set using the knob
OFF
or
ON
.
Press the key
START / PULSE
in order to store the setting.
As confirmation,
ok
will be displayed for a short period.
18
Recall hours of operation
Recall hours of operation is only possible during rotor standstill.
Hold down the key
SELECT
for 8 seconds.
After 8 seconds,
SOUND / BELL
appears in the display.
Press the key
SELECT
once again.
The centrifuge’s hours of operation (
CONTROL:
) are displayed.
Press the key
OPEN / STOP
to exit the hours of operation recall.
19
Cooling (only in centrifuges with cooling)
The temperature set-point can be adjusted from -10°C to +40°C. The lowest obtainable temperature is dependent on
the rotor (see Chapter "Anhang/Appendix, Rotoren und Zubehör/Rotors and accessories").
19.1 Standby-cooling
With rotor standstill and closed lid the centrifugal chamber is cooled to the pre-selected temperature. The
temperature set-point is shown in the display.
Standby cooling will be subject to a timed delay after a centrifuge run and the display will show
OPEN
OEFFNEN
. The delay time can be pre-set in 1minute steps from 1 to 5 minutes. It is pre-set to 1 minute.
With the rotor standing still and the cover open the delay time can be set as follows:
Hold down the key
for 8 seconds.
After 8 seconds,
t/min = X
appears in the display.
Use the rotary button to set the delay time.
Press the key
START / PULSE
in order to store the setting.
As confirmation,
ok
will be displayed for a short period.
To leave the delay time display press the key
OPEN / STOP
or do not press any key for a period of 8 seconds.
19.2
Pre-cooling the rotor
Press the key
. The LED in the button
START / PULSE
lights up for as long as the rotor turns.
Press the button
OPEN / STOP
to end the pre-cooling. The run-down is effected with the selected brake step. The
brake step is displayed.
During the centrifugation run the rotational speed of the rotor or the subsequently resulting RCF value, the sample
temperature and the expired time will be displayed.
The pre-cooling speed can be adjusted in decadic steps from 500 RPM to the max RPM of the rotor. It is pre-
adjusted to 10000 RPM.
When the rotor is stationary and the lid open the pre-cooling speed can be set in the following manner:
Hold down the key
for 8 seconds.
After 8 seconds,
t/min = X
appears in the display.
Press the key
once again.
The set pre-cooling RPM -
RPM = XXXX
will be displayed.
Set the desired pre-cooling speed using the knob .
Press the key
START / PULSE
in order to store the setting.
As confirmation,
ok
will be displayed for a short period.
To leave the pre-cooling RPM display press the key
OPEN / STOP
or do not press any key for a period of 8 seconds.
