Thermo Scientific Multifuge X1R Instruction Manual page 25

2. Enter the desired value using the numeric pad.
The digits show in sequential order.
3. Confirm your entry by pressing
Your entry will be automatically confirmed if you do not press any key for 5 seconds.
Note If an extremely low RCF value has been selected, it will be corrected automatically if the
resulting speed is less than 300 rpm. This is because 300 rpm is the lowest selectable speed.
The relative centrifugal force (RCF) is given as a multiple of the force of gravity g. It is a unitless
numerical value which is used to compare the separation or sedimentation capacity of various
devices, since it is independent of the type of device. Only the centrifuging radius and the speed
come into play in it:
RCF = 11.18
r = centrifuging radius in cm
n = rotational speed in rpm
The maximum RCF value is related to the maximum radius of the tube opening.
Remember that this value is reduced depending on the tubes and adapters used.
This can be accounted for in the calculation above if required.
Run time preselection
1. Press the
The display shows the message
Enter the desired runtime in hh.mm
2. Press the
Thermo Scientific
.
Explanation of RCF value
2
n
 
× ×
------------ -
r
1000
key in order to open the runtime selection menu.
Set Time.
key repeatedly to switch over to mm:ss or Hold mode respectively.
4
Operation
Entering parameters
Multifuge X1R
4-5