Thermo IEC Micromax 3590, Руководство по обслуживанию

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3
OPERATION
3.1
Rotor and Accessories
A balanced load is essential with all high-speed
centrifuges. An unbalanced load produces vibration and
causes excessive wear of motor bearings. Therefore,
always load the rotor symmetrically. When using tube
adapters, install an adapter in the opposite tube position.
The total weight of samples loaded in opposing positions
must be equal in weight to within 1.0 gram. The position
numbers, present on rotors, identify opposing tube
positions.
Samples of different specific gravities can be processed in
the same run, provided that the samples of a given type
are balanced around the rotor as though they were the
only ones in the rotor
.
Rotor Installation To install the rotor, lower it straight onto the shaft. Align the
holes in the rotor with the positioning pins on the shaft. To
do this, hold the rotor in one hand and hold the shaft, as it
protrudes through the rotor, with the other hand. Rotate
them in opposite directions until the pins line up with the
holes and the rotor drops down into position. Do not apply
excessive force. Screw the metal locking nut (clockwise)
on the shaft to hold the rotor down. Be sure the orange
rubber ring is facing downward. Hold the rotor and tighten
the nut moderately with your fingers; do not over tighten it
.
The 891 rotor cover must be installed prior to the rotor
being placed in the centrifuge. Verify that the o-ring seals
(2) are in place around the outer and inner perimeters of
the rotor. To install the cover, place the rotor on a flat
surface and then place the rotor cover on top of the rotor.
Using the palm of your hand(s), press down evenly around
the cover to fully engage the seals.
The 851, 852 and 853 rotor covers prevent generation of
aerodynamic noise during the spin. It also prevents gross
aerosol effects in the event of tube failure. It fits snugly
over the rotor and pulls off easily. To place it properly,
rotate the cover until it drops easily onto the adapter
spline. Press down until the rim of the cover contacts the
rotor. The spline at the top of the shaft adapter drives the
lid during rotation.
Micromax Series
10
Service Manual