Thermo 6464K, Инструкция по эксплуатации

Страница: 7 / 24

OM6464K Rev. 4 11 January 2004 Page 7 of 24
Avoiding Vibration
All centrifuges have critical speeds at which vibration
occurs. As the speed increases beyond the critical speed,
vibration will cease. This inherent condition also occurs
during deceleration. An imbalanced load intensifies these
critical vibrations. You should avoid running the centrifuge
at or near its “critical speed” to avoid excessive vibration.
Rotor Installation
To install the rotor:
1. Place the rotor (with recognition ring facing down and
all printing facing up) onto the shaft.
2. Tighten the locking nut with the provided wrench. Slide
the wrench handle to one side in order to utilize
maximum torque. Remove the wrench.
3. Place the cover onto the rotor (fixed angle only) using
the knob in the center of the cover to position it.
NOTE: It is important to use the cover on fixed angle
rotors. This cover cuts down on aerodynamic noise and
windage, enabling the rotor to achieve maximum
specified speed with minimal noise levels.
CAUTION
!
Make sure that the rotor is properly seated on the
drive pins BEFORE tightening the locking nut.
Running the centrifuge with an improperly seated
rotor will damage the rotor and the centrifuge.
1. Load two tubes at
positions: 9 and
18.
2. Load four tubes at
positions:
1, 5 and 10, 14
or
7, 3 and 16, 12
3. Load six tubes at
positions:
1, 9, 5 and 14, 18,
10
or
7, 9, 3 and 12, 18,
16
4. Loading an odd
number of tubes is
not recommended.
Rotor Removal
To remove the rotor:
1. If your rotor has a dic, remove this first by loosening the
nut.
2. Using the wrench provided, loosen the rotor locking nut.
3. Remove the wrench.
4. Remove the locking nut.
5. Lift the rotor off the shaft.
3.2 Starting and Stopping a Run
The display above the Program key shows the unit’s
operating mode:
• blank The unit is in manual operation.
• 1-99 The unit is under control of the displayed
stored program number.
The rest of the display indicates the last parameters
selected.
Manual Operation
For manual operation:
1. Press the MANUAL key so that the program display is
blank.
2. Select the desired temperature (IEC Centra CL5R only).
3. Select the speed/g-force, run time, acceleration mode,
and braking mode.
4. Press START to start the spin.
The rotor will accelerate to 100 - 200 rpm and then coast
for a few seconds while the rotor recognition system
verifies the rotor and set parameters.
The time display counts down, and displays the time
remaining in the current spin, during manual operation.
The specified run time begins when the START key is
pressed. Braking begins when the set time elapses. Run
time does not include braking time.
The spin will stop automatically, at the end of the desired
interval.
DRIVE PIN
Fixed Angle
Swinging Bucket
Rotor Installation
Rotor Installation