2-7
Description
SPEED Selection
The
key is pressed to select the speed mode (RPM or
RCF). After the mode is selected, the SPEED knob functions as
follows.
• In RPM mode, each SPEED knob increment is 100 rpm at speeds
up to 10 000 rpm. Above 10 000 rpm, each knob increment is
500 rpm.
• In RCF mode, at settings less than or equal to 3000
×
g
, each
SPEED knob increment is equivalent to incrementing/
decrementing the speed by 100
×
g
. At settings greater than
3000
×
g
, each SPEED knob increment is equivalent to
incrementing/decrementing the speed by 250
×
g
.
• Speed increments for elutriator rotors are either 10 rpm or 10
×
g
.
TIME Selection
Two time modes are available. The HR:MIN mode is used for runs
of specified lengths. The HOLD mode is used for continuous runs of
unspecified lengths. The
_,30(a
key is used to toggle between the
two modes.
In HR:MIN mode:
• The TIME knob is used to set run time, which can be set up to
3 hours and 0 minutes (180 minutes).
• Each TIME knob increment is 1 minute. A full turn of the knob
equals 60 minutes.
• The time setting can be changed during a run.
• During a run, the time remaining in the run is displayed. When
0 is reached, the run ends and the rotor decelerates to a stop.
In HOLD mode:
• When HOLD mode is selected, the time display shows the word
HOLD.
• During a run, the time elapsed is displayed. When the display
reaches 3 hours and 0 minutes, the system automatically resets the
display to 0 and begins counting the elapsed time again. The run
will continue until
_7834a
is pressed.
• If you switch from HOLD mode to HR:MIN mode during a run,
the system remembers the previous time setting. Turning the
TIME knob increments or decrements the set time from that point.
RPM/
RCF
SPEED
RPM/RCF
TIME/
HOLD
TIME