Deleting Program Linking; Cooling (Only In Centrifuges With Cooling); Standby-Cooling; Pre-Cooling The Rotor - Hettich ROTO SILENTA 630 RS Bedienungsanleitung

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27.4

Deleting program linking

•
Press the
•
Set the program location for the first program (XX+) by means of the control knob
•
Press the
•
Press the
•
Press the
• Press the
28

Cooling (only in centrifuges with cooling)

The temperature set-point can be adjusted from -20°C to +40°C. The lowest obtainable temperature is dependent on
the rotor (see Chapter "Anhang/Appendix, Rotoren und Zubehör/Rotors and accessories"). If the actual temperature
and the set temperature deviate more than 5 °C, the temperature value in the display will start to flash on and off.
28.1

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.
28.2

Pre-cooling the rotor

For rapid pre-cooling of the unloaded rotor and the accessories, it is recommended that the centrifuge is run with the
continuous running settings and a speed of ca. 20% of the maximum rotor speed.
29

Heating (only on centrifuges with heating/cooling option)

During operation of the centrifuge the centrifuge chamber can be heated as required to the preselected temperature.
The heating is switched off when the rotor is stationary.
Risk of burning! The surface temperature of the heating element in the centrifugal chamber of the centrifuge
can reach 500°C / 932°F. Do not touch the heating element.
30

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 centrifuge.
key in order to display the parameter PROG-Nr. The input field will be displayed inversely.
PROG
key. The centrifugation data for the selected program location will be displayed.
RCL
key twice in order to display the parameter PR-PART. The input field will be displayed inversely.
PROG
key twice.
STO
key.
PROG
⎛ ⎞
RPM
⎜ ⎟
=
RCF
⎝ ⎠
1000
For more on the centrifugal radius see the chapter " Anhang/Appendix,
Rotoren und Zubehör/Rotors and accessories".
The relative centrifugal force (RCF) stands in relation to the revolutions per minute and the centrifugal
radius.
2
× × ⇒
r 1,118
.
RCF
= ×
RPM 1000
×
r 1,118
EN
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