Replacement Parts:
Part No. Description
7724037 Foot, rubber
7751068 Switch, lid safety
7786061 Rotor, six-place, horizontal
7735049 Motor, 1/30 H.P., 115 V.A.C. permanent split capacitor
7729006 Capacitor, 4uF, 250V A.C.
7717051 Electronic timing and locking board
7751043 Circuit Breaker
03-0-0003-0068 Front Panel Label
7760002 Power cord
7714101 Pawl, latch, lid
7714103 Knob, latch, lid
7724071 Hinge, friction
7732018 Seal, lid gasket
7713031 Red Tube Holder, for 17 mm x 100 mm tubes
7713033 Green Tube Holder, for 17 mm x 75 mm Tubes
02-002-1-0011 Lid Assembly
Available Accessories:
1” Tube cushion
p/n 1525
0.25” Tube cushion
p/n 9150
13 x 75 mm Insert
p/n 7713064
13 x 100 mm Insert
p/n 7713066
P/N 03-0-0002-0039
Programmable
Run Time is Factory
Preset to
10
MINUTES
See Page 5
Shield caps
p/n 7713011
The Drucker Company warranties that this centrifuge is free from defects
Phone: 814-342-6205 or 814-692-7661 • Fax: 814-692-7662 • www.druckercompany.com
0.5 to 1 mL Tube Adapter
p/n 7713068
WARRANTY:
in workmanship and parts for 2 years.
Made in the USA by
200 Shady Lane, Suite 170 • Philipsburg, PA 16866
1.5 to 2 mL Tube Adapter
p/n 7713065
Operator’s Manual
Protected by U.S. patent # 6,811,531
Rev. F
Model 642E • Laboratory Centrifuge
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. 8
Care and Maintenance pg. 9
Troubleshooting pg. 10
Safety, Emergency Lid Unlock pg. 11
Calibration and Ground Testing pg. 11
Replacement Parts pg. 12
Available Accessories pg. 12
Model Description:
The Model 642E 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 Model 642E features a lighted control panel that
displays the status of the machine, easily viewable from a distance.
For warranty information, turn to page 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.
The Bio-Seal accessory for the model 642
tube holders is the non-aerosol shield cap,
p/n 7713011. 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.
For your safety and the durability of your
machine, never transport or store centrifuge
with tube holders inside machine.
Intended Use:
General purpose laboratory centrifuge for sample separation.
Supplied Equipment*:
The following items come standard with each Model 642E centrifuge:
The Horizon Model 642E complies with all requirements of
UL standard 61010A-1, 61010A-2-20; Can/CSA C22.2 No’s
1010.1; 1010.2.20.
Safety:
Lid Safety Switch: The Model 642E 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 Model
642E 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 Model 642E 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.
1. One (1) six–place horizontal rotor
2. Six (6) 100 mm tube holders
3. Six (6) 75 mm tube holders
p/n 7786061
p/n 7713031
p/n 7713033
4. Two (2) 13 x 75 mm inserts p/n 7713064 (Not shown below)
5. Two (2) 13 x 100 mm inserts p/n 7713066 (Not shown below)
6. Two (2) 0.5 to 1 mL tube adapters p/n 7713068 (Not shown below)
7. Two (2) 1.5 to 2 mL tube adapters p/n 7713065 (Not shown below)
x6
1. 2.
For Optional Accessories see the last page of this manual
* The rotor and rotor accessories are rated for a rotation frequency of 4,000 RPM.
Page 2
x6
3.
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 authorized 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
Troubleshooting:
NOTE:
The latch must be turned completely
clockwise to its stop position in order
for the centrifuge to operate.
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 latch light on
the control panel will illuminate.
– 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 procedure on the
same page to change the run preset time.
Features:
• Swing–out horizontal rotor design, 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:
‘RUNNING’ Green –lights when power is applied to the motor
‘LATCHED’ Yellow –lights when the lid is closed and latched
‘UNLOCKED’ Red –lights when the lock system is deactivated
Specications:
General Specications for the Model 642E Centrifuge
Nominal Speed (Horizontal): 3,380 (+/- 100) RPM
Nominal RCF (Horizontal): 1,600 (+/- 90) xg
Maximum capacity (Horizontal): 60 mL (6 x 10 mL)*
Overall Dimensions (H x W x D): 8.75 in. x 11.75 in. x 14 in.
Centrifuge Motor: 1/30 HP, p.s.c. motor
Maximum Acceleration Time: 10 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: 13.75 lbs.
Any use other than those specied by the Manufacturer is explicitly prohibited.
* Maximum sample density is 1.15 grams / mL, (water density = 1.0 grams / mL)
For servicing information or additional technical support, contact The
Drucker Company at
814-342-6205 or 814-692-7661.
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. For further assistance, contact
The Drucker Company at 814-342-6205 or
1. Plug the centrifuge in to 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 page 10 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 ’LATCHED’ 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 that the ’LATCHED’ light is on.
7. Turn the centrifuge on by pushing the ‘START’ button.
8. The ‘RUNNING’ 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 pushing the ’OPEN /
STOP’ button immediately and refer to page 10 on troubleshooting.
11. While the machine is running, try to turn the latch counterclockwise. Power may
be cut to the motor but you should be unable to fully turn the latch. If it is possible
to turn the latch and open the lid while the unit is running, contact The Drucker
Company for assistance. Close and latch the lid.
814-692-7661.
Care and Preventative Maintenance:
With proper care and maintenance your centrifuge will provide years of laboratory
service. For proper care, the following steps should be taken:
1. Provide Adequate Ventilation: For cooling purposes, the Model 642E 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 Model 642E 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 Model 642E 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. Inspect tube holders regularly for cracks. If
cracks are discovered, replace immediately.
7. Remove Accessories Before Moving: All tube holders, samples, and caps
must be removed from the rotor chamber before transporting or storing the
centrifuge to prevent damage and injury.
Page 4
(cont.)
Page 9
Tube Holder Congurations:
The Model 642E 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.
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.
(Continued)
12. Push the ‘OPEN / STOP’ button. The ‘RUNNING’ indicator light should
go out and the motor should slow to a stop.
13. 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.
14. 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.
Control Panel:
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 75 mm tube
holder with no cushion, (congurations B1 or B2).
A.
A.
RED
B.
100 mm
Tube Holder
B1.
RED
B2.
GREEN
75 mm
Tube Holder
C.
C.
100 mm Tube
Holder with
1525 cushion*
* This part is available as an accessory. Contact The Drucker Company for assistance.
Page 8
GREEN
75 mm Tube
Holder
with 1525
cushion*
‘LATCHED’
Indicator Light
‘UNLOCKED’
Indicator
Light
‘RUNNING’
Indicator
Light
‘START’
‘OPEN /
STOP’
Button
Button
‘RUNNING’ Lights up when the machine
‘LATCHED’ Lights up when the lid has
‘UNLOCKED’ Lights up to indicate that the
To verify the preset time: NOTE: Your centrifuge must be plugged in.
a. Push the OPEN / STOP button to disengage the lock and then
open the lid.
b. Push and hold the START button for approximately three (3) seconds. The Yellow
LATCHED indicator light will begin to ash, indicating program mode.
c. When you release the START button, the RUNNING indicator light will begin to
ash. Each ash represents one minute of run time.
d. Press the START button to verify the brake setting. When you release the START
button, the RUNNING indicator light will begin to ash. Each ash represents the
brake setting, from 1 to 10.
To change the preset time: NOTE: Your centrifuge must be plugged in.
a. Push the OPEN / STOP button to disengage the lock and then
open the lid.
b. Push and hold the START and OPEN buttons for approximately three (3)
seconds. The yellow LATCHED indicator light will begin to ash slowly, indicating
that you can now program run time.
is in operation, (power is
being applied to the motor).
been closed and latched
properly.
locking mechanism has been
deactivated, allowing access
to the rotor chamber.
‘START’ Begins a new run, (the lid
‘OPEN / STOP’Allows for access into the
Page 5
must be closed, see pg. 6).
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.
(cont.)
(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 ash
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 ash each time you press the start button.
f. When you are nished, press the ‘OPEN’ button to exit. Use the above procedure
to verify the run time and brake setting change.
Operation:
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.
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.
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
’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 ash 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 fteen (15) seconds.
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 t 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.
Page 6
Page 7
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