1-15
Specifications and Preinstallation Requirements
Ensuring Correct JCF-Z Rotor Identification
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 magnets that ensure correct rotor identi-
fication in Avanti J series centrifuges. We rec-
ommend that older JCF-Z rotors be returned to
the Beckman coulter factory for addition of the
magnets before use in the Avanti J-25I. Call
Beckman Coulter Field Service
1
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 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.
➠
NOTE
If the JCF-Z rotor is misidentified, the run speed
will be limited to the maximum speed for the
identified rotor. (The maximum speed for the
JCF-Z rotor is 20 000 rpm.)
1
In the United States, call 1-800-742-2345. Outside the U.S., contact your local Beckman Coulter office.
