Drucker Diagnostics Model 642E Centrifuge - Manual (Page 6)

Operation:
NOTE: Follow the initial setup procedure on page 4 before initial operation.
1. Plug the centrifuge into an approved 115 Volt A.C., 60 Hz. outlet.
2. Push the ‘OPEN / STOP’ button and then open the lid.
3. Insert cushions (if needed) into the tube holders for the tube size you are using.
Refer to ‘Tube Holder Configurations’ (page 8) for assistance.
4. Place the test tube samples into the tube holders. Be sure to follow the rules for
balanced loads.
5. Close the lid and turn the lid knob clockwise to its complete stop position. The
’LATCHED’ indicator light should turn on to indicate that the latch is closed
properly.
If the lid knob is not completely latched, the ‘LATCHED’ indicator light will not
turn on and the centrifuge will not operate!
6. The timer has been set to a preset time of ten (10) minutes. To display or
change this time setting, refer to page 5.
7. Turn on the machine by pushing the ‘START’ button on the control panel.
8. The centrifuge should begin to spin. The ‘RUNNING’ indicator light should
illuminate.
IF A PROBLEM IS FOUND DURING A SPIN THAT REQUIRES THE CENTRIFUGE TO
SHUT DOWN, PRESS THE ‘OPEN / STOP’ BUTTON!
9. The ‘RUNNING’ indicator light will begin to flash when one minute remains.
10. After time has elapsed, the ‘RUNNING’ indicator light will extinguish and the
rotor will slow to a complete stop.
11. The ‘UNLOCKED’ indicator light will illuminate and the locking mechanism will
disengage allowing entry into the rotor chamber. If it does not, refer to page 10
on troubleshooting.
12. Turn the lid knob counterclockwise and open the lid.
13. Remove the samples.
14. If the machine re–locks before the samples are removed, press the
‘OPEN/STOP’ button to unlock the lid for an additional fifteen (15) seconds.
Page 6
BALANCED LOADS
Your centrifuge must contain a balanced load in order to work properly.
Use the following rules when loading the rotor.
Spinning balanced loads will extend the life of the machine and
produce better results.
1. Opposing tube holders must be identical and must contain the same
cushion, or none at all.
2. Opposing tube holders must be empty or loaded with equally
weighted samples.
3. If an odd number of samples is to be spun, fill a tube with water to
match the weight of the unpaired sample and place it across from this
sample.
Page 7
Before using any cleaning or decontamination methods except those
recommended by the manufacturer, users should check with the manufacturer
that the proposed method will not damage the equipment.
The rotor chamber, rotor and accessories shall be thoroughly cleaned using
either isopropyl alcohol, soap and water, or bleach. The use of Fully/Partially
Halogenated Hydrocarbons, Ketones, Esters and all other chemicals not
prescribed by the manufacturer may cause damage to the rotor and tube
holders and shall not be used.
Rotor Removal and Installation:
To remove the rotor:
1. Unlock the centrifuge by pushing the ‘OPEN / STOP’ button and unlatch
and open the lid.
CAUTION: Unplug the centrifuge from the electrical outlet at this time to
eliminate the possibility of electrical shock or other injury.
2. Remove the test tube holders.
3. Remove the nut in the center of the rotor by turning it counterclockwise,
(a tool may be required).
4. The rotor is sitting on a cone-shaped adapter. Pull the rotor up and off of
this adapter.
To install the rotor:
1. Place the rotor back onto the cone-shaped adapter. You may
need to turn the rotor slightly to line it up properly.
2. The rotor should slide onto the rotor cone freely.
3. Once a proper fit has been achieved, replace the nut and turn it
until it is hand-tight, (a tool may be required).
4. Replace the tube holders and verify that they are seated
properly, (as shown on page 4).
5. It is recommended that the initial setup procedures be performed
to ensure that the rotor has been installed correctly and that no
damage has been done to the centrifuge during either the rotor
installation or possible rotor chamber cleaning. See page 4 for
this procedure.
(Continued)
c. Press START one time for each minute of run time desired, from a minimum of
1 minute to a maximum of 30 minutes. The green START indicator light will flash
each time you press the START button.
d. Press OPEN to enter the run time. You will now begin to adjust the brake setting.
e. Press START to adjust the brake setting, from a minimum of 1 to a maximum
of 10. The green START indicator light will flash each time you press the start button.
f. When you are finished, press the ‘OPEN’ button to exit. Use the above procedure
to verify the run time and brake setting change.