RC12
BP™
Controls, Indicators, and Displays
3-7
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. Pressing START
resets the run.
NOTE If you change the duration control mode to TIME during a
run, time will begin to count down from the set value the
moment the change is made (unless the run was previ-
ously controlled by time and you are returning, in which
case the run resumes counting from the value that was
remaining when TIME was exited). If you change to ACE
control, the last-set ACE value that is displayed the mo-
ment the change is made will control termination, so that if
you change to ACE when the run has already exceeded
the value, the run will terminate immediately.
Between runs, the RUN display shows the previous run duration
values, viewable in each control mode. Pressing TIME shows the
MIN:SEC value at termination (the SET display shows the last TIME
input value). HOLD shows the total MIN:SEC value after deceleration
to zero. After an ACE controlled run, ACE shows the total ACE 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.
TEMP is pressed to change desired calculated sample temperature
(°C, settable from –10 to 40) that is controlled by the centrifuge during
a run. The centrifuge automatically considers the rotor selected, rotor
speed, run time, set temperature, and measured temperature to
calculate and maintain sample temperature during the run. The
calculation assumes that the sample temperature, rotor temperature,
and SET temperature are all equal at the start of the run (as they must
be any time that temperature control is critical).
RECALL is pressed to access program memory. Saved parameters
are recalled by inputting a specific program number. By pressing
START, you begin a run using the run parameters displayed. Also,
programs can easily be recalled and modified to create new run
parameters without fear of damaging the original program, because
information that is saved in memory cannot be overwritten by using
the RECALL key (modifying or replacing a program is reserved for
the SELECT SAVE RUN option under the MENU key).
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