Fisher Scientific accuSpin 3, Operating Instructions Manual

Page: 40 / 82

Operation
36
Selecting speed
The centrifuge speed can be set to a minimum of 300
rpm and to a maximum of 4150 rpm (depending on the
rotor).
You can adjust the in 10 rpm increments. Proceed as
follows:
1. By pressing the "set" keys once (for an increase)
or (for a decrease) in the "speed" section of the
control panel, you switch from actual to set point
values. The value last stored is displayed, with the
digit entered flashing (if there is no value stored in
memory, this is indicated by dashes -----).
2. By briefly pressing the input key you can raise or
lower the speed by
one step (10 rpm)
at a time.
3. If you hold down the key pressed, the display
changes at first slowly and after a few seconds at
an accelerated pace.
4. Release the key as soon as you have reached the
desired value, and adjust if necessary by repeatedly
pressing the key. The decimal place flashes for a
number of seconds, then changes to permanent
display. The speed is now stored.
For faster operation, you may shift the flash-
ing cursor in the speed/RCF and the run
time panels: just press both and
simultaneously. The cursor moves by one
digit to the left for each key depression.
Entering the RCF value
You can adjust the RCF set point in steps of 1. The set
point is entered analogously to the speed.
As long as the rotor has not been identified, it is not
possible to display RCF values. This is signaled by
dashes ----- in the display.
Shortly after starting the centrifuge run, the rotor is
identified and the current value is displayed.
NOTE:
If you set an extremely low RCF value, this may be
automatically corrected if the resulting speed would be
lower than 300 rpm.