3-9
Operation
Table 3-2. Deceleration Settings
Figure 3-1. Acceleration and Deceleration Settings Graph
Setting the Acceleration Rate
➠
NOTE
The default setting for both acceleration and
deceleration is maximum (MAX). If the MAX
indicator lights are already lit, no input is
required. To choose a different setting, follow
the steps below.
Maximum Deceleration
Slow Deceleration
Off
Full brake is used from set
speed to near 0 rpm, to bring
the rotor to a stop in the
shortest possible time.
Reduced brake is used
during the last few rpm until
0 is reached, to minimize
disturbance of the sample.
Reduced torque is used from set speed to
500 rpm, causing deceleration to 500 rpm to take
twice as long as maximum deceleration. (The
exact rate depends on the mass of the rotor in
use. Larger rotors will take longer.)
Deceleration time from 500 to 0 rpm is approxi-
mately 2 minutes (larger rotors take longer).
No brake is used. Rotor
coasts to 0 rpm. This
process can take up to
1 hour, depending on the
rotor in use and the speed
at the start of deceleration.
Application: pelleting
Application: gradients, pelleting
Application: gradients
0
500
Slow
Accel
Max
Accel
Max
Decel
Slow
Decel
Rotor Speed (RPM)
Time
Off (no brake)
Run Speed