Replacement Parts:
Part No. Description
7724037 .................... Foot, rubber
7751068 ................... Switch, lid safety
7786021 ................... Rotor, 6-place, horizontal
7735014 ................... Motor, 1/30 HP, 115 VAC permanent split capacitor
7729006 ................... Capacitor, 4μF, 250 VAC
7717036 ................... Electronic timing and locking board 230 V
7751043 ................... Circuit Breaker
7760005 ................... Type F Power Cord
7714101 ................... Pawl, latch, lid
7714103 ................... Knob, latch, lid
7712316 ................... Lid
7724071 ................... Hinge, friction
7732018 ................... Seal, lid gasket
7713031 ................... 100 mm tube holder, red
7713033 ................... 75 mm tube holder, green
Available Accessories:
P/N 7711067
Programmable Run Time
is Factory Preset to
10 Minute 3,800 RPM
5 Minute 1,800 RPM
See Page 5
100 mm
Tube Holder
p/n 7713040
1˝ Tube
Cushion
p/n 1525
75 mm
Tube Holder
p/n 7713043
0.25˝ Tube
Cushion
p/n 9150
6-Place
Horizontal Rotor
p/n 7786021
Tube
Holder 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
Operator’s Manual
Rev. C
Model 642VFD-Plus • 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 Lid Removal 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-Plus is a continuous-duty, electronically-controlled horizontal
centrifuge with a lid safety interlock system. The unit is controlled by two electronic
push–button timers that have been preset for ten (10) minutes 3,800RPM & ve
(5) minutes 1,800 RPM, 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 Plus features a lighted
control panel that displays the status of the machine, easily viewable from
a distance. For warranty information, turn to page 12.
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 Plus Interlock System: In addition to the Lid Safety Switch, the
642VFD-Plus 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.
Intended Use
General purpose laboratory centrifuge for sample separation.
Supplied Equipment*:
The following items come standard with each 642VFD Plus 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
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
p/n 7786021
p/n 7713031
p/n 7713033
× 6
×
6
Circuit Breaker: The 642VFD-Plus 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.
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:
The lid latch must be turned completely
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
For servicing information or additional technical support,
contact The Drucker Company or your authorized distributor.
The rotor does not spin freely.
– If there is nothing obstructing the rotor, 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 closed properly. The
latch is closed properly when the yellow ‘LATCH’ indicator light is 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 Lid Removal”.
the preset is not the desired length follow the instruction on the
rear of the machine to change the run preset time.
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 1’ Green – lights when power is applied to the motor
‘RUN 2’ 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 (RUN 1): ............................ 3,800 (+/- 100) RPM
Nominal RCF (RUN 1): ................................ 2,000 (+/- 90) xg
Nominal Speed (RUN 2): 1,800 (+/- 100) RPM
Nominal RCF (RUN 2): 450 (+/- 70) 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.
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
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
Maximum Relative Air Humidity: 90%
Any use other than those specified by the Manufacturer is explicitly prohibited.
Maximum sample density is 1.15 grams / mL, (water density = 1.0 grams / mL)
* Check the serial number badge for your model specific voltage requirements
(22 cm x 28 cm x 32 cm)
preset to 10 minutes, +/– 1%
o
C - 35 oC
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”
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 pre mature 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!
× 24”, (with the centrifuge at the center). No person or hazardous material
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 rotation. If the rotor does not spin
freely, refer to the section on troubleshooting.
5. Place the six test tube holders inside the rotor (as shown
to the right), and verify that they are seated properly.
6. Close the lid. Rotate the lid knob clockwise to its complete
stop position. The ‘LATCH’ indicator 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 and the ‘LATCH’ indicator light is illuminated.
7. Turn the centrifuge on by pushing the desired ‘START’
button; either PRP or PRFM.
8. The appropriate ‘RUN’ indicator light will illuminate.
9. The test tube holders will slide up into the horizontal position 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.
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 for fteen (15) additional seconds.
After the centrifuge has passed this procedure it is ready for operation.
Horizontal Rotor Shown
Care and Preventative Maintenance:
With proper care and maintenance your 642VFD-PLUS 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-PLUS 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-PLUS 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. See page
6 for information on balancing the load.
3. Keep the Tube Carriers / 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-PLUS 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.
6. Tube Holder Replacement: It is recommended that tube holders be replaced
after 24 months of use.
Page 4
(cont.)
Page 9
Tube Holder Congurations
The 642VFD-Plus is capable of spinning test tubes up to 17 mm x 100 mm with its
horizontal rotor. Use the following chart and drawing to determine which tube holder
and cushion combination should be used with your application.
Your centrifuge must contain a balanced load in order to work properly.
To ensure that the load is balanced, keep these rules in mind when
inserting test tube samples into the six position horizontal rotor:
1. Opposing tube holders must be identical.
2. Opposing tube holders must be empty or loaded with equally weighted samples.
3. If an odd number of samples is to be spun, use a water-lled tube with the unpaired one.
DIRECTIONS:
1. Compare the tube to be spun with the boxes shown here.
2. Find the box that most closely matches the tube’s length.
NOTE: The tube length with its stopper or cap must be shorter
than the chosen box.
3. Match the letter from the chosen box with one of the congurations
shown. For Example: A tube as long as box B. Accordingly, we
can use a 100 mm tube holder with a 1525 cushion or a 75
mm tube holder with no cushion, .(congurations B1 or B2).
A.
B.
A.
RED
100 mm
Tube Holder
B1.
100 mm Tube
Holder with
1525 cushion
B2.
RED GREEN
75 mm
Tube Holder
C.
GREEN
C.
75 mm Tube
Holder
with 1525
cushion
Control Panel:
‘LATCH’
Indicator
Light
‘RUN 1’
Indicator
Light
‘START 1’
Button
‘START 2’
Button
‘START 1’
Begins a new 10 minute run.
NOTE: The lid must be closed.
‘START 2’
Begins a new 5 minute run.
NOTE: The lid must be closed.
‘LATCH’
Lights up when the lid has been closed 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 indicate 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.
‘START 1’
Lights up when the machine is operating for a 10
minute run. Power is being applied to the motor.
‘START 1’
Lights up when the machine is operating for a 5
minute run. Power is being applied to the motor.
‘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.
‘UNLOCKED’
Indicator
Light
‘OPEN / STOP’
Button
‘RUN 2’
Indicator
Light
* This part is available as an accessory. Contact The Drucker Company for assistance.
Page 5Page 8
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 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 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
’LOCKED’ indicator light should turn on to indicate that the latch is closed properly. 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 !
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 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.
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. Ifanoddnumberofsamplesistobespun,llatubewithwaterto
match the weight of the unpaired sample and place it across from this sample.
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 .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.
Page 6
Page 7
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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