Beckman Coulter Avanti J-20 XP Instruction Manual page 30

Specifications and Preinstallation Requirements
Ensuring Correct JCF-Z Continuous Flow/Zonal Rotor Identification
1-16
See
REPLACEMENT PARTS AND SUPPLIES
complete list of Zonal Bracket Kit part numbers and kit contents.
The centrifuge's rotor identification system can, under two specific
conditions, misidentify the JCF-Z continuous flow/zonal rotor. These
conditions and corrective actions are listed below.
➠
NOTE
JCF-Z rotors manufactured after March, 1997,
contain special magnets that ensure correct rotor
identification in Avanti J series centrifuges. We
recommend that older JCF-Z rotors be returned
to the Beckman Coulter factory for addition
of the magnets before use in the Avanti J-20XP.
Call Beckman Coulter Field Service for more
information.
The following information pertains to JCF-Z rotors manufactured
before March, 1997, and to JCF-Z rotors that have not been modified
at the factory.
• When the bearings in the JCF-Z rotating seal assembly get old
or worn, the resulting "drag" on the bearings changes the rotor's
dynamic properties, making them similar to those of several
Beckman Coulter fixed angle rotors. If rotor misidentification
occurs when your JCF-Z rotor is used, first perform three runs
from 0 to 5000 rpm and back to 0 rpm. If rotor misidentification
recurs, replace the bearings. See the JCF-Z rotor instruction
manual (publication JCFZ-IM) for bearing replacement instruc-
tions. Be sure to follow instructions in the next paragraph below
for "wearing in" the bearings.
• On the first few uses of a new JCF-Z rotor, or when the bearings
have been replaced in an older JCF-Z rotor, lubrication has not yet
been thoroughly distributed around the bearings in the bearing
housing. The excess lubrication produces drag on the bearings,
which can change the rotor's dynamic properties enough to cause
rotor misidentification. To "wear in" the bearings and distribute
the lubrication, perform three runs from 0 to 5000 rpm and back
to 0 rpm.
in Section 5 for a