III–10
Thermo Scientific Cryofuge 8 / 16 Centrifuges and Heavy Duty Centrifuges
Operation
NOTICE
If a speed or RCF-value out of the nominal range has been selected, a message will appear with the
permissible values.
Explanation of RCF-Value
The relative centrifugal force (RCF) is given as a multiple of the force of gravity (g). It is a unit less numerical value
which is used to compare the separation or sedimentation capacity of various centrifuges, since it is independent of
the type of device. Only the centrifuging radius and the speed are used for calculation:
RCF = 11.18 x
x r r
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 buckets used.
This can be accounted for in the calculation above if required.
6. 3. Runtime Preselection
1. Press the time field on the main screen to open the runtime selection menu.
2. Press
Time
,
Hold
or
∫ ω²dt
, depending on the value you would like to change.
3. Enter the desired value using the numeric pad. The digits show in sequential order.
4. Confirm your entry by pressing
Confirm
.
Time
Hold
ACE
Duration of centrifugation; input as
hh:mm. The set time is counted down
when centrifugation is in progress.
Initial value: Defined duration
hh:mm:00
Unlimited duration of centrifugation.
The time elapsed so far is displayed
while centrifugation is in progress.
Initial value: 00:00:00
Accumulated Centrifugal Effect enter in
x.y * 10
z
X: Whole digits (1
st
input field)
Y: Decimal numbers (2
nd
input field)
Z: Power (3
rd
input field)
6. 4. Preselect Temperature
You can preselect temperatures between -20 °C and 40 °C.
To set the temperature, proceed as follows:
1. Press the temperature field in order to open the temperature menu.
2. Enter the desired temperature. The digits show in sequential order.
3. Confirm your entry by pressing
Confirm
.
6. 5. Pre-warm or Pre-cool the Centrifuge
To pre-temp the centrifuge, proceed as follows:
1. Use
Configuration
and
Runs
to select a stored program. The pre-temp function is connected to a program.
2. Press
Load
to select programmed parameters. In the main screen you can then set the required target temperature.
