Replacement Parts:
Part No. Description
7724037 Foot, rubber
7751068 Switch, lid safety
7786021 Rotor, six-place, horizontal
7735049 Motor, 1/30 H.P., 115 V.A.C. permanent split capacitor
7729006 Capacitor, 4uF, 250V A.C.
7717038 Electronic timing and locking board
7751043 Circuit Breaker
7760002 Power Cord
7714101 Pawl, latch, lid
7714103 Knob, latch, lid
7712316 Lid
7724071 Hinge, friction
7732018 Seal, lid gasket
7713031 Red Tube Holder, for 17mm x 100mm tubes
7713033 Green Tube Holder, for 17mm x 75mm tubes
Available Accessories:
P/N 7711046
Programmable
Run Time is Factory
Preset to
10
MINUTES
1” Tube Cushion
p/n 1525
Six (6) 100 mm
Carriers
p/n 7713031
0.25” Tube Cushion
p/n 9150
Six (6) 75 mm
Carriers
p/n 7713033
Rotor, six-place,
horizontal
p/n 7786021
Shield Caps
p/n 7713011
WARRANTY:
The Drucker Company warranties that this centrifuge is free from
defects in workmanship and parts for 12 months.
Made in the USA by
200 Shadylane Drive, Philipsburg, PA 16866 U.S.A.
Phone: +1-814-692-7661 Fax: +1-814-692-7662
www.druckercompany.com
See Page 5
Operator’s Manual
Rev. C
Model 642VFD • Laboratory Centrifuge
Protected by U.S. patent # 6,811,531
Table of Contents
Model Description pg. 2
Supplied Equipment pg. 2
Features pg. 3
Specications pg. 3
Setup Location and Procedure pg. 4
Front Panel Controls pg. 5
Operation pg. 6
Rotor Removal and Installation pg. 7
Tube Holder Congurations pg. 7,8
Care and Maintenance pg. 9
Troubleshooting pg. 10
Safety, Emergency Rotor Chamber Entry pg . 11
Calibration and Ground Testing pg. 11
Replacement Parts pg. 12
Available Accessories pg. 12
WARNING: For the safety of both
the operator and service personnel,
care should be taken when using this
centrifuge if handling substances that
are known to be toxic, radioactive
or contaminated with pathogenic
microorganisms. When Risk Group
II materials are used, (as identied
in the World Health Organization
“Laboratory Bio–Safety Manual”), a
Bio–Seal should be employed. In the
event that materials of a higher risk
group are being used, more than one
level of protection must be provided.
The use of ammable or explosive
materials as well as those materials
which have a vigorous chemical reaction is prohibited.
Model Description:
The 642VFD is a continuous-duty, electronically-controlled horizontal
centrifuge with a lid safety interlock system. The unit is controlled by an
electronic push–button timer that has been preset for ten (10) minutes, for
precise spin times and ease of use. Samples can be safely viewed through
the transparent lid. Entry into the machine is restricted during operation by
the safety interlock system. The 642VFD features a lighted control panel
that displays the status of the machine, easily viewable from a distance.
For warranty information, turn to page 12.
Supplied Equipment*:
The following items come standard with each 642VFD Horizon centrifuge:
1. Operator’s manual
2. One (1) six–place horizontal rotor
3. Six (6) 100mm tube holders
4. Six (6) 75mm tube holders
p/n 7786021
p/n 7713031
p/n 7713033
x 6
x 6
Safety:
Lid Safety Switch: The lid is secured to the top of the cabinet by a latching
knob and pawl system. When the knob is rotated clockwise, the pawl grips the
underside of the cabinet opening and prevents the lid from opening. A mechanical
stop positions the pawl and prevents it from rotating completely. When rotated to
the stop position, the pawl makes contact with a micro–switch mounted underneath
the cabinet top. The lid safety switch prevents the centrifuge from operating while
the lid is open. An indicator light on the front of the machine will light up when the
lid has been latched properly.
Lid Safety Interlock System: In addition to the Lid Safety Switch, the 642VFD
has a true “0 RPM” lid locking system. The lid safety interlock system keeps the
lid locked at all times, (even during power failure), and requires that the rotor be
at rest in order to unlock the lid. The centrifuge will not allow entry into the rotor
chamber unless the centrifuge has power and the rotor is stopped. To open the
lid, make sure that the centrifuge is plugged in and, with the rotor stopped, press
the ‘OPEN / STOP’ button.
Note: After the centrifuge has started spinning, it may be possible to rotate
the lid knob enough to cause the pawl to lose contact with the lid safety
switch. If this happens, the centrifuge motor may lose power, but the lid will
still remain locked. If the knob is accidentally moved and this situation should
occur, rotate the knob fully clockwise to its stop position and the centrifuge
will resume operation.
Circuit Breaker: The 642VFD is protected with a 4 Amp circuit breaker located
at the rear of the machine mounted to the base. Any electrical short circuit will
cause the breaker to cut power to the machine.
Emergency Rotor Chamber Entry:
In the event of power failure, it may be
impossible to unlock the lid by conventional
means. In this case, entry into the rotor
chamber may be made by removing the latch
label and using a pen to manually disengage
the locking mechanism (see photo). Pull the
mechanism towards the control panel and
then unlatch and open the lid. If the unit is
damaged, contact your authorised dealer or
The Drucker Company.
Optional Accessories:
0.25” tube cushions, p/n 9150
1.0” tube cushions, p/n 1525
* The rotor and rotor accessories are rated for a rotation frequency of 4,000 RPM.
Page 2
Calibration and Earth Ground Testing:
It is recommended that the top speed, ground continuity and line leakage be
tested every two years for continued safe operation.
Contact The Drucker Company for further information or testing availability.
Page 11
NOTE:
Troubleshooting:
1. Problem:
Solutions: – Make sure nothing has fallen into the rotor chamber.
2. Problem: Excessive noise when the machine is running.
Solutions: – Check to see that the load is balanced.
3. Problem: The centrifuge does not run.
Solutions: – Check the electrical outlet.
4. Problem: The latch light does not come on when the lid is closed.
Solutions: – Make sure that the unit has power.
5. Problem: The machine does not unlock after a run has completed.
Solutions: – The lid should remained locked until the rotor has nearly come to a
6. Problem: The run time is not set to the desired length.
Solutions: – Check the run preset by following the instructions on page 5. If
The rotor does not spin freely.
– If there is nothing obstructing the rotor, the rotor may be damaged.
Contact The Drucker Company for further assistance.
– Make sure that nothing has fallen into the rotor chamber.
– Make sure that the nut in the center of the rotor is tight.
– Have a technician test the motor and replace it if necessary.
– Make sure the lid latch is turned completely clockwise to its stop
position. When the lid is closed properly, the locked light on
the control panel will illuminate.
– If the unit is getting power, make sure that the lid latch is close prop-
erly. The latch is closed properly when the yellow ‘LATCH’ indicator
lights illuminated.
– Check the circuit breaker switch at the bottom left of the machine.
If the switch is white, the breaker has tripped. Contact The Drucker
Company for further assistance.
– The printed circuit board may be damaged. Have a technician test
and replace the circuit board if necessary.
– Make sure the lid latch is turned completely clockwise to its stop
position. The latch makes contact with a switch underneath the
front top of the cabinet. If this switch is not activated, the light will
not turn on and the machine will not run.
complete stop and then unlock for 60 seconds. If additional unlock
time is needed, press the ’OPEN / STOP’ button with the machine
plugged in and the rotor stopped. If the lid remains locked after this
and will not unlock, the electronics may have been
damaged. Contact The Drucker Company for assistance. To
access the rotor chamber, follow the procedure on page 11,
“Emergency Rotor Chamber Entry”.
the preset is not the desired length follow the instruction on the
rear of the machine to change the run preset time.
The lid latch must be turned
completely clockwise to its
stop position in order for the
centrifuge to operate.
Features:
• Swing–out horizontal rotor design (patent-pending), incorporating a
unique test tube holder that produces horizontally separated samples
while requiring no additional parts
• Cool–Flow air ow design that prevents overheating of samples
• Heavy gauge steel construction for safety and durability
• Lid safety switch that prevents the centrifuge from operating unless the
lid is closed and latched
• Removable rotor for easy cleaning
• Locking lid that allows entry into the centrifuge only after the rotor has
completely stopped
• Brushless permanent split capacitor AC motor
• Clear lid for safe observation of samples and optical calibration of speed
• Electronically controlled timed operation, (see pg. 5)
• Push-button operation
• Indicator lights:
‘RUN’ Green –lights when power is applied to the motor
‘LATCH’ Yellow –lights when the lid is closed and latched
‘UNLOCKED’ Red –lights when the locking system is deactivated
Specications:
Nominal Speed (Horizontal): 3,800 (+/- 100) RPM
Nominal RCF (Horizontal): 2,000 (+/- 100) xg
Maximum capacity (Horizontal): 60 mL (6 x 10 mL)*
Overall Dimensions (H x W x D): 9.0 in. x 11 in. x 12.5 in.
(22 cm x 28 cm x 32 cm)
Centrifuge Motor: 1/30 HP, p.s.c. motor
Nominal Acceleration Time: 30 seconds
Protection Breaker: 4 Amp. re–settable
Timer: electronic, 1 to 30 minutes
preset to 10 minutes, +/– 1%
Current Requirement: 1.9 Amps
Voltage Requirement: 115 (+/- 10) Volts
Frequency: 60 Hz
Weight: 18.5 lbs. (8.4kgs)
Permitted Environmental Conditions
Ambient Temperature During Operation: 2 oC - 35 oC
Maximum Relative Air Humidity: 90%
* Maximum sample density is 1.15 grams / mL, (water density = 1.0 grams / mL)
Any use other than those specied by the Manufacturer is explicitly prohibited.
For servicing information or additional technical support,
contact The Drucker Company or your authorized distributor.
Page 10
Page 3
Setup Location:
1. Unpack the centrifuge and verify that all of the supplied equipment is present.
2. Choose a setup location which meets the following criteria:
a) A bench top clearance height of 20” is required in order to open the lid.
b) The clearance envelope is the space around the centrifuge which is
required for safety. Choose a setup location which will allow for a
clearance envelope of at least 24” x 24”, (with the centrifuge at the center).
No person or hazardous material shall be permitted in the clearance
envelope during operation. The operator time within the envelope shall
be limited to the time necessary for loading, unloading and centrifuge
operation only.
c) Proper ventilation is necessary to prevent the overheating of samples as
well as premature failure of the centrifuge. Choose an area which will
allow unencumbered air ow.
d) The centrifuge is designed to secure to the operating surface by four
suction feet. No adjustment is necessary for leveling the centrifuge,
however, the surface should be at and level.
e) Be sure the outlet is always within reach as the line cord is the
means of emergency disconnection!
Initial Setup Procedure:
If any problems are found during the initial setup procedure, refer to the
troubleshooting section on page 10.
1. Plug the female end of the line cord into the rear of the centrifuge. Plug the male
end into an approved ......electrical outlet. For electrical safety, the unit must
always be properly grounded.
2. For safety purposes, the locking system is always activated. To deactivate the
system, (in order to insert or retrieve samples), press the ‘OPEN / STOP’ button
on the control panel. The ‘UNLOCKED’ indicator light should illuminate. If it does
not, refer to page 10 on troubleshooting. The lid will be unlocked for 15 seconds
after pushing the ‘OPEN / STOP’ button.
3. Turn the latch counterclockwise and open the lid.
4. Spin the rotor by hand; check for free and level ro tation. If the rotor does not spin
freely, refer to the section on troubleshooting.
5. Place the test tube holders inside the rotor
and verify that they are seated properly.
6. Close the lid. Rotate the lid knob clock
wise to its complete stop position. The ‘LATCH’
in dicator light should be illuminated. If it is
not, make sure that the lid is latched properly.
The centrifuge will not run unless the lid is latched
properly and the ‘LATCH’ indicator light is illuminated.
7. Initiate a test run by pressing the ‘START’ button.
8. The ‘RUN’ indicator light will illuminate
9. The test tube carriers will slide up into the horizontal position (horizontal rotor
only) and the unit will accelerate to full speed.
10. Listen to the sound of the centrifuge. A smooth whirring sound should be heard.
If there are any loud or unusual sounds, stop the centrifuge by pressing the
‘OPEN/STOP’ button immediately and refer to the section on troubleshooting.
11. Push the ‘OPEN / STOP’ button. The ‘RUN’ indicator light should go out and the
motor should slow to a stop.
Horizontal Rotor Shown
Care and Preventative Maintenance:
With proper care and maintenance your 642VFD centrifuge will provide years of
laboratory service. For proper care, the following steps should be taken:
1. Provide Adequate Ventilation: For cooling purposes, the 642VFD draws in
ambient air through the air intake cover on the top of the lid and exhausts this
air in the rear of the base. The centrifuge should be placed on a hard smooth
surface for good air circulation.
2. Always Spin Balanced Loads: Make certain that you are always spinning a
balanced load. The 642VFD has a unique counter balanced
motor mounting design which, along with it’s rubber suction feet, produces
excellent vibration dampening. However, out–of–balance loads may break
glass test tubes and may produce unsatisfactory separation results.
Proper load balancing will improve sample separation and extend the life of
the centrifuge. Refer to page 6 on balanced loads for additional information
on balancing the load.
3. Keep the Tube Holders Clean: NOTE: Always follow the safety guidelines of
your laboratory to properly clean up and/or dispose of materials in the event
that a substance known to be potentially toxic, radioactive or contaminated
with a pathogenic microorganism is spilt in or on the centrifuge. Small
glass fragments left in the tube holder after a tube breakage may adhere to
the next test tube inserted in that holder. When this tube is handled, these
fragments may puncture protective gloves and lacerate the operator’s
ngers or hand. Remaining fragments may provide stress points on
subsequent tubes and result in additional breakage. If a tube breakage
occurs, carefully remove the tube holder. Properly dispose of the sample
and tube fragments and thoroughly clean both the inside and outside of the
tube holder. Insert a new tube cushion (if necessary) and replace the tube
holder in the rotor.
4. Motor and Electrical Maintenance: The 642VFD uses a
brushless permanent split capacitor AC motor. It should not need servicing
for the life of the centrifuge. The electrical components are selected for high
reliability and should not need service.
5. Keep the Rotor Chamber Clean: Every six months, or whenever there is a
tube breakage, (refer to the note in #3), it may be necessary to remove the
rotor and clean the rotor chamber. Follow the instructions on page 7 to
remove and reinstall the rotor.
CAUTION: Once the lid has been opened, unplug the line cord from the
electrical outlet to eliminate the risk of electric shock during cleaning.
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.
Apply cleaning solutions with a towel or cloth. Do not submerge the
centrifuge in water or other cleaning solutions as this will cause damage
and void your warranty!
6. Tube Holder Replacement: It is recommended that the tube holders be
replaced after 24 months of use.
Page 4
(cont.)
Page 9
Tube Holder Congurations:
The 642VFD is capable of spinning test tubes up to 17mm x 100mm with its horizontal rotor. Use the following chart and drawing to determine which tube holder
and cushion combination should be used with your application.
DIRECTIONS:
1. Compare the tube to be spun with the three boxes shown below.
2. Find the box that most closely matches the tube’s length. NOTE: The
tube length with its stopper or cap must be shorter then the chosen
box or the tube will not t properly in the tube holder.
3. Match the letter from the chosen box with one of the congurations shown.
For Example: A tube is found to be as long as box B. Accordingly, we
can use a 100 mm tube holder with a 1525 cushion or a 75mm tube
holder with no cushion, (congurations B1 or B2).
A.
(Continued)
12. The lid should remain locked until the rotor has nearly stopped. If the
machine unlocks prematurely, contact The Drucker Company for
assistance. Once the rotor has stopped, the interlock system will
become disengaged for sixty (60) seconds. The ‘UNLOCKED’
indicator light will illuminate during this time.
13. To gain entry into the centrifuge after this period has ended, simply
press the ‘OPEN / STOP’ button. The lid will unlock fo fteen (15)
additional seconds.
After the centrifuge has passed this procedure it is ready for operation.
Control Panel:
‘RUN’
Indicator
Light
‘LATCH’
Indicator
Light
‘START’
Button
‘UNLOCKED’
Indicator
Light
‘OPEN / STOP’
Button
A.
RED
100 mm
Tube Holder
B1.
RED GREEN
B2.
75 mm
Tube Holder
C.
GREEN
100 mm Tube
Holder with
1525 cushion
* This part is available as an accessory. Contact The Drucker Company for assistance.
Page 8
75 mm Tube
Holder
with 1525
cushion
B.
C.
‘START’
Begins a new run.
NOTE: The lid must be closed.
‘LATCH’
Lights up when the lid has been closed and
latched properly.
‘UNLOCKED’
Lights up to indicate that the locking mechanism has been deactivated, allowing access
to the rotor chamber.
To verify 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 until the latched light begins to ash, then
release.
5. The unit will indicate the settings for the START button you selected with
audible “beeps”. Count the number of beeps, they indicate the run-time setting in minutes.
6. Press the same START button again, count the beeps, this time they indi-
Page 5
‘RUN’
Begins a new run.
NOTE: The lid must be closed.
‘OPEN / STOP’
Allows for access into the rotor
chamber by disengaging the
locking mechanism. Entry is
only permitted when the rotor
is stopped. Pressing this button
during operation will terminate
the run and unlock the lid after
the rotor has come to a stop.
(Continued)
cate the RPM setting (one beep = 100 RPM).
7. Press the START button again counting the beeps, they indicate the brake
setting magnitude (1=off, 10=Maximum).
8. Press STOP/OPEN to return to the idle state.
9. If you have a two speed model, you can check the second preset run time,
RPM and brake settings by using the second START button.
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 ash (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 ash 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 programmed.
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.
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 Congurations’ (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 ‘LATCH’ indicator light should turn on to indicate that the latch is
closed properly. If the lid knob is not completely latched, the ‘LATCH’
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 ‘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 !
9. The run indicator light will begin to ash when one minute remains.
10. After time has elapsed, the ‘RUN’ indicator light will extinguish and the rotor
A.
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 fteen (15) seconds.
Your centrifuge must contain a balanced load in order to work properly.
BALANCED LOADS
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, ll a tube with water to
match the weight of the unpaired sample and place it across from this sample.
Page 6
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.
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.
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 t has been achieved, replace the rotor 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.
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