Drucker Diagnostics 642VFD-Plus User Manual

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: [phone] • Fax: [phone]

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
Specications pg. 3
Setup Location and Procedure pg. 4
Front Panel Controls pg. 5
Operation pg. 6
Rotor Removal and Installation pg. 7
Tube Holder Congurations 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 identied 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

Specications:

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

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