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3
Control Panel
PRIMARY FUNCTION KEYS
• When START is pressed, the realized ACE value begins to accumulate in the RUN DISPLAY.
• The run will terminate and deceleration will begin when the specified ACE value (expressed as
ω
2
dt
• After termination, the RUN DISPLAY will continue to accumulate until the rotor stops - this run
total is for reference; care should be taken not to confuse the RUN DISPLAY's final accumulation
with the controlling input/ timeout value, found in the SET DISPLAY.
• Compared to control by time, ACE selection provides a more advanced and relevant form of run
duration control, thereby improving separation consistency, run reproducibility, and dependability
of results.
• During a run, to view in an alternative duration control mode (for example, to monitor
accumulating TIME when an ACE run is in progress), press one of the other two duration control
keys once - this changes the RUN DISPLAY to show an accumulating value in that alternative
mode without altering the way duration is controlled. In this viewing condition, the SET
DISPLAY field header does not change, nor will the status of the ACE indicator (both continuing
to indicate the set control mode), but the SET value will change to show the last value entered in
the alternative mode. If you press the same key a second time, the run will then change to that
control method, using the value that was in the SET DISPLAY as the controlling value until a
different one is entered.
Note If you change the duration control mode to TIME during a run, time begin to will count
down from the set value the moment the change is made (unless the run was previously controlled
by time, in which case the run will resume counting down from the value that existed when the
TIME mode was exited). If you change mode to ACE control, the set value that exists at the
moment the change is made will control run termination. If you change to ACE after the run has
exceeded the set value, the run will terminate immediately.
• Between runs, the RUN DISPLAY shows the previous run duration values. You can choose each
control mode.
• Press the TIME key to see the MIN:SEC value at termination (the SET DISPLAY shows the last
TIME input value).
• Press the HOLD key to see the total MIN:SEC value after deceleration to zero.
• Press the ACE key to see the total ACE of an ACE controlled run. value after deceleration to zero
(the termination value is in the SET DISPLAY). If the previous run was not controlled by ACE,
pressing ACE shows the ACE value at termination (the SET DISPLAY shows the last ACE input
value).
• Always be sure of the control method and value before pressing START.
1
The integral value can be calculated deriving the following formula:
∫
ω
2
dt
=
Δt
Where
ω
2
and
n
3-6
RC 12BP+
1
value up to 9.99 x 10
∫
ω
ω
Δt
2
2
dt
=
Change in time (seconds)
=
Angular speed
=
π n/60 ]
[
2
=
Speed (rpm)
=
30
[displayed as 9.99e30]) is reached.
Thermo Scientific
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