Drucker Diagnostics 642M User manual

642M
Operator’s Manual
P/N 03-0-0002-0104 Rev. I

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TABLE OF CONTENTS
Model Description .......................................................................................1
Intended Use:...............................................................................................1
Supplied Equipment.....................................................................................2
Features .......................................................................................................2
General Specifications .................................................................................3
Initial Setup Procedure ................................................................................3
Control Panel ...............................................................................................5
Verifying The Preset Time............................................................................6
Changing The Preset Time ...........................................................................6
Operation.....................................................................................................7
Spinning Balanced Loads..............................................................................8
Rotor Removal And Installation ...................................................................8
To remove the rotor: ...............................................................................8
To install the rotor:..................................................................................8
Care And Preventative Maintenance...........................................................9
Cleaning and Disinfection ..........................................................................10
Transportation ...........................................................................................10
Troubleshooting.........................................................................................11
Emergency Rotor Chamber Entry ..............................................................13
Calibration Testing .....................................................................................13
Safety .........................................................................................................13
Replacement Parts.....................................................................................15
Available Accessories .................................................................................15
Warranty....................................................................................................15

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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 identified in the
World Health Organization “Laboratory Bio-Safety Manual”), a Bio-Seal should
be employed. The Bio-Seal accessory for the model is the non-aerosol shield
cap with appropriate tube holders (contact Drucker Diagnostics to purchase). 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 flammable 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.
MODEL DESCRIPTION
The Model 642M is a 12VDC continuous-duty, electronically-controlled
horizontal centrifuge intended for mobile applications where the Vehicle has a
12VDC power supply (cigarette lighter). The unit has a lid safety interlock
system and 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 642M
features a lighted control panel that displays the status of the machine, easily
viewable from a distance.
For warranty information, see the last page of this manual.
INTENDED USE:
This is a general purpose laboratory centrifuge intended for safe and rapid
density based separation of fluids, including physiologic fluids, in approved
specimen receptables, for qualitative or quantitative test procedures. This
device is intended to be operated by properly trained personnel who have
carefully read and understood the Operating Manual.
Users should also comply with the specimen receptable manufacturer’s specific
instructions for use, in addition to any other protocols established by the
testing organization.

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SUPPLIED EQUIPMENT
One (1) six–place horizontal rotor
P/N 7786061
Six (6) 100 mm tube holders
P/N 7713031
Six (6) 75 mm tube holders
P/N 7713033
The rotor and accessories are rated for a rotation frequency of 4,000 RPM.
For optional accessories, see page 17 of this manual.
FEATURES
•12VDC power supply (cigarette lighter) for mobile centrifugation
•Swing–out horizontal rotor design, incorporating a unique test tube
holder that produces horizontally separated samples while requiring
no additional parts
•Cool–Flow air flow 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. 8)
•Push-button operation
•Indicator lights:
Color
Status
‘RUNNING’
Green
Power is applied to the motor
‘LATCHED’
Yellow
Lid is closed and latched
‘UNLOCKED’
Red
Lock system is deactivated

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GENERAL SPECIFICATIONS
Operating Voltage
12-24V DC
Power
100 Watts
Maximum Load
6 x 10 mL
Maximum Sample Density
1.15 grams/mL
Nominal Speed (75-100 mm)
3,400 (± 175) RPM @ 13.8V
Nominal RCF (75-100 mm)
1,650 xg
Nominal Voltage
13.8V
Environmental Conditions
- For In-vehicle/Indoors Only
- Ambient Temperature
2°C - 35°C
- Humidity
90% Max
Noise
≤ 65 dB(A)
Dimensions
8.75 in. x 11.75 in. x 14 in.
Weight
12 lbs
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)
INITIAL SETUP PROCEDURE
If any problems are found during the initial setup procedure, refer to the
troubleshooting section on page 13. For further assistance, contact Drucker
Diagnostics at 814-692-7661.
1. Plug the power cord into the automobile’s 12V accessory outlet.
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 the
troubleshooting section of this manual. 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 troubleshooting section of this
manual.
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

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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 the
troubleshooting section of this manual.
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 Drucker Diagnostics for assistance. Close and
latch the lid.
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 Drucker Diagnostics for
assistance.
14. Once the rotor has stopped, the interlock system will become
disengaged for sixty (60) seconds. The ‘UNLOCKED’ indicator light will
illuminate during this time.
15. To gain entry into the centrifuge after this period has ended, simply
press the ‘OPEN / STOP’ button. The lid will unlock for fifteen (15)
additional seconds.
After the centrifuge has passed this procedure it is ready for operation.

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CONTROL PANEL
‘RUNNING’
Lights up when the
machine
is in operation, (power is
being applied to the
motor).
‘START’
Begins a new run, (the lid
must be closed, see pg. 6).
‘LATCHED’
Lights up when the lid has
been closed and latched
properly.
‘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’
Lights up to indicate that
the
locking mechanism has
been deactivated,
allowing access to the
rotor chamber.
Circuit Breaker: The Model 642M 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.

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VERIFYING 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
c. LATCHED indicator light will begin to flash, indicating program mode.
d. When you release the START button, the RUNNING indicator light will
begin to flash. Each flash represents one minute of run time.
e. Press the START button to verify the brake setting. When you release
the START button, the RUNNING indicator light will begin to flash.
Each flash represents the brake setting, from 1 to 10.
CHANGING 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 flash
slowly, indicating that you can now program run time.
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.

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OPERATION
NOTE: Follow the initial setup procedure on page 5 before initial operation.
1. Plug the power cord into the automobile’s 12V accessory outlet.
2. Unlock the lid by pressing the OPEN/STOP button on the control panel.
The UNLOCKED indicator light should illuminate. 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 smooth rotation free from excessive
wobble.
5. Place six test tube holders (supplied) of the same type 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 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 the ‘LATCHED’ light is illuminated.
7. Start a centrifugation cycle 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
rotor 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.
11. Push the OPEN/STOP button. The ‘RUNNING’ 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
centrifuge unlocks prematurely, contact Drucker Diagnostics 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 fifteen (15)
additional seconds.

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SPINNING 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.
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 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.
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 5 for this procedure.

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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 642M
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 642M has a unique counter
balanced motor mounting design which, along with its 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
10 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 fingers 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 642M uses a brushless
permanent split capacitor AC motor. It should not need routine
servicing for the life of the centrifuge. The electrical components are
selected for high reliability and should not need routine service.
5. 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.
6. 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.

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CLEANING AND DISINFECTION
To prolong the life of the centrifuge cleaning and disinfection is recommended
every six months, or whenever there is a spillage or tube breakage.
Contaminants must be removed immediately, or corrosion and premature
degradation of components can occur.
1. Unplug the centrifuge before cleaning.
2. 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 the warranty.
3. ONLY isopropyl alcohol, soap and water, or a 10% (5500 PPM) bleach
solution should be used for cleaning and disinfection of the centrifuge
and accessories.
4. All surfaces must be dried immediately after cleaning and disinfecting.
5. TBQ Germicidal products shall not be used, as they will cause damage
to the centrifuge and void the warranty.
6. The use of fully/partially halogenated hydrocarbons, ketones, esters,
ethers, benzyls, ethyl benzenes, and all other chemicals not prescribed
by the manufacturer shall not be used as they may cause damage to
the rotor chamber, rotor, tube holders, accessories and centrifuge
exterior and void the warranty.
7. It may be necessary to remove the rotor and clean the rotor chamber.
Follow the instructions on page 10 to remove and reinstall the rotor.
TRANSPORTATION
During transportation, accessories can become dislodged from the rotor and
fall into the rotor chamber where they can remain unnoticed.
Before transporting the centrifuge in a vehicle; make certain that the centrifuge
is secured sufficiently to prevent shifting sliding or rolling, and that there are no
tube holders or accessories in the rotor or rotor chamber.

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TROUBLESHOOTING
Note: The latch must be turned completely clockwise to its stop position in
order for the centrifuge to operate.
The rotor does not spin
freely.
oMake sure nothing has fallen into the
rotor chamber.
oIf there is nothing obstructing the
rotor, the rotor may be damaged.
contact Drucker Diagnostics for
further assistance.
Excessive noise when
the machine is
running.
oCheck to see that the load is
balanced.
oMake sure that nothing has fallen into
the rotor chamber.
oMake sure that the nut in the center
of the rotor is tight.
oHave a technician test the motor and
replace it if necessary.
The centrifuge does
not run.
oCheck the electrical outlet.
oMake 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.
oCheck the circuit breaker switch at
the bottom left of the machine. If the
switch is white, the breaker has
tripped. Contact Drucker Diagnostics
for further assistance.
oThe printed circuit board may be
damaged. Have a technician test and
replace the circuit board if necessary.
The latch light does
not come on when the
lid is closed.
oMake sure that the unit has power.
oMake 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.

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The machine does not unlock
after a run has completed.
The lid should remain locked until
the rotor has nearly come to a
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 Drucker
Diagnostics for assistance. To
access the rotor chamber, follow
the procedure on page 15,
“Emergency Rotor Chamber
Entry”.
The run time is not set to the
desired length.
Check the run preset by following
the instructions on page 8. If the
preset is not the desired length
follow the procedure on the same
page to change the run preset
time.
Rotor speed is lower than
specified range
Rotor speed is calibrated at
13.8VDC. Confirm source voltage
meets or exceed this value. Motor
speed will vary according to
source voltage.

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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
Drucker Diagnostics.
CALIBRATION TESTING
It is recommended that the top speed be tested every two years for continued
safe operation. Contact Drucker Diagnostics for further information or testing
availability.
SAFETY
The Model 642M complies with US, Canadian, and European Safety standards.
•The centrifuge should be placed on a stable, flat surface.
•Before using the centrifuge, check the rotor. Do not operate the
centrifuge if the rotor is loose, or does not rotate freely.
•Rotors and accessories that show evidence of damage or corrosion or
are to be taken out of service.
•The centrifuge must be taken out of service if safety related damages
are found in the rotor chamber.
•Do not open the lid until the rotor has come to a complete stop.
•For use only on smooth level surfaces, or approved stands.
•Do not move the centrifuge while it is plugged in or running.
•Do not operate the centrifuge in a moving automobile.
Lid Safety Switch: The Model 642M 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.

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Lid Safety Interlock System: In addition to the Lid Safety Switch, the Model
642M has a true “0 RPM” lid locking system. The lid safety locking 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.

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REPLACEMENT PARTS
Part No.
Description
7724037
Foot, rubber
7751068
Switch, lid safety
7786061
Rotor, six-place, horizontal
7760016
Power Cord
7735054
Motor
7751079
Fuse
03-1-0008-0016
Pawl, latch, lid
03-1-0008-0009
Knob, latch, lid
7724071
Hinge, friction
7732018
Seal, lid gasket
02-002-1-0024
Lid Assembly
03-0-0003-0188
Front Panel Label
02-006-1-0047
Control board
7713079
Shield for 75/100 mm tubes
7713031
Red Tube Holder, for 17 mm x 100 mm tubes
AVAILABLE ACCESSORIES
0.5 to 1 mL Tube
Adapter
p/n 7713068
1.5 to 2 mL Tube
Adapter
p/n 7713065
SmartView™
Platform
p/n 00-079-009-001
WARRANTY
Drucker Diagnostics warranties that this centrifuge is free from defects in
workmanship and parts for 2 years.

FDA LISTED
INSTRUCTIONS FOR DISPOSAL OF WEEE BY USERS IN THE EUROPEAN UNION
This product must not be disposed of with other waste. Instead, it
is the user’s responsibility to dispose of their waste equipment by
handing it over to a designated collection point for the recycling of
waste electrical and electronic equipment. The separate collection
and recycling of your waste equipment at the time of disposal will
help to conserve natural resources and ensure that it is recycled in
a manner that protects human health and the environment. For
more information about where you can drop off your waste
equipment for recycling, please contact your local city office, waste
disposal service, or where you purchased the product.
200 Shady Lane, Suite 170 • Philipsburg, PA 16866
[phone] (U.S. only) • [phone] • www.druckerdiagnostics.com
Protected by U.S. Patents #6,811,531, & #D718463 Other Patents Pending
Made in the USA by
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Compliant