Drucker Diagnostics Model 642VFD Plus Centrifuge - Manual (Page 6)

Operation:
NOTE: Follow the initial setup procedure on page 4 before initial operation.
1. Plug the centrifuge into an approved A.C. outlet. (Refer to the instrument’s
Serial Number Badge and see page 3 for details).
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
’LOCKED’ indicator light should turn on to indicate that the latch is closed prop-
erly. If the lid knob is not completely latched, the ‘LOCKED’ indicator light will
not turn on and the centrifuge will not operate!
6. The timers have been set to a preset times of 10 minutes @ 3,800RPM and 5
minutes @ 1,800RPM. To display or change this time setting, refer to page 5.
7. Turn on the machine by pushing the appropriate ‘START’ button on the control
panel.
8. The centrifuge should begin to spin. The corresponding ‘RUN’ indicator light
should illuminate.
IF A PROBLEM IS FOUND DURING A SPIN THAT REQUIRES THE CENTRIFUGE TO
SHUT DOWN, PRESS THE ‘OPEN / STOP’ BUTTON !
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
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 .5”
nut driver may be required).
4. The rotor is sitting on a cone-shaped adapter. Pull the rotor up and off of this
adapter.
Before using any cleaning or decontamination methods except those recom-
mended 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 Haloge-
nated 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.
To change the preset run time, RPM and brake settings:
1. Plug in the line cord.
2. Press the OPEN button to unlock the lid.
3. Open the lid.
4. Press and hold a START button along with the STOP/OPEN button until
the latched light begins to flash (approximately 1 second on, 1 second off),
then release.
5. Press the same START button once for each minute of run time desired.
The time may be set from 1 to 30 minutes.
6. Press the STOP/OPEN button to assign the settings. The latched LED will
begin to flash at an increased rate (~1/2 second on, ~1/2 second off).
7. Press the START button to program the RPM, each press adds 100 RPM.
(i.e. pressing 10 times is a setting of 1000 RPM). Minimum RPM = 500,
Maximum =3,800
8. Press the STOP/OPEN button to save the setting. The RPM is now pro-
grammed.
9. Press the START button to set the brake level (1 press=off, 10=MAX).
10. Press STOP/OPEN to exit programming mode.
11. If you have a two speed model, you can assign the second runtime, RPM
and brake settings by using the second run button.
12. NOTE: The maximum setting for runtime, RPM and braking cannot be
exceeded, however if it is attempted, an error buzzer will sound to indicate
that the limit has been reached, if you hear the error buzzer, you are at the
maximum setting.
9. The run indicator light will begin to flash when one minute remains.
10. After time has elapsed, the ‘RUN’ 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.