Figure 1-4. The Control Panel (Refrigerated Models) - Beckman Coulter Allegra 6 Series Instruction Manual

BRAKE
TIME
SPEED
1
Actual speed may fluctuate due to line voltage variation.

Figure 1-4. The Control Panel (Refrigerated Models)

This switch is used to select the brake mode used during deceleration.
Refer to the appropriate rotor manual for acceleration and decelera-
tion times for available rotors under various conditions. The three
positions of the switch provide:
• HIGH position activates high dynamic braking that starts immedi-
ately after the timer turns the motor off. When rotor speed reaches
50 rpm, all braking stops and the rotor coasts to a stop.
• OFF removes braking entirely and allows the rotor to coast to a
stop from set speed.
• LOW position activates low dynamic braking down to 50 rpm, and
is used for slower deceleration to avoid remixing or resuspension
of the sediment.
This variable-setting knob may be set for timed runs or longer-
duration continuous runs. Either type of run can be stopped at any
time by switching the timer to OFF.
• Timed runs — the knob may be set for any run time up to
30 minutes in 1-minute increments.
• Continuous runs — with the knob set to HOLD, the centrifuge will
run until turned off.
The variable-setting knob is used to set the drive speed, in 200-rpm
increments, up to 8000 rpm. For precise speed adjustments, the
ACCU-SET button can be pressed as the speed knob is turned until
the required speed appears on the RPM display. The centrifuge will
accelerate to the set speed and maintain that speed for the duration of
1
the run. ACCU-SET can be adjusted at any time during a run.
Description
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