3-6
Operation
STOPPING A RUN
A timed run ends automatically when the TIME control counts down
to zero. To end a run in progress for any reason:
Action
Result
1. Turn the TIME control knob
to OFF.
The door interlock system will keep the door latched until the rotor
has virtually stopped (spinning less than 40 rpm).
➠
NOTE
Do not stop a run by turning the SPEED knob
to 0. This will disengage the brake and the rotor
will coast to a stop, which could take a long
time. Always use the TIME knob to stop a run.
2. After the rotor stops spin-
ning, move the manual lock
lever to the left (UNLOCK)
UNLOCK
LOCK
.
The door interlock system will release the latch and allow the door
to be opened when the rotor speed is 40 rpm or less. However, for
operator safety, do not open the door until the rotor has come to a
complete stop.
3. Press the DOOR switch to
OPEN.
!
CAUTION
If disassembly reveals evidence of leakage, you
should assume that some fluid escaped the rotor.
Apply appropriate decontamination procedures
to the centrifuge and accessories.
After completing a run, unload the rotor as described in the appro-
priate rotor manual. It is not necessary to remove the rotor from the
centrifuge between runs unless the rotor or chamber bowl needs to be
cleaned. (If the rotor is left in the centrifuge between runs, make sure
the rotor is seated on the drive shaft and the tie-down nut is tight
before each run.)
➠
NOTE
Accumulations of sample, dust, and/or glass
particles from broken sample tubes can ruin
rotor pins and cause rotor vibrations. To prevent
these accumulations, remove the rotor and clean
the centrifuge bowl often. See
CLEANING
in
Section 5.
