Drucker Diagnostics Model 642VFD Plus Centrifuge - Manual (Page 2)

Page 2
* The rotor and rotor accessories are rated for a rotation frequency of 4,000 RPM.
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.
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
× 6
Optional Accessories:
0.25” tube cushions, p/n 9150
1.0” tube cushions, p/n 1525
× 6
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 & five
(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.
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
WARNING: For the safety of both
the operator and service personnel,
care should be taken when using
this centrifuge if handling sub-
stances 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–Safe-
ty Manual”), a Bio–Seal should be
employed. In the event that materi-
als of a higher risk group are being
used, more than one level of pro-
tection must be provided. The use
of flammable or explosive materials
as well as those materials which
have a vigorous chemical reaction
is prohibited.
Table of Contents
Model Description pg. 2
Supplied Equipment pg. 2
Features pg. 3
Specifications pg. 3
Setup Location and Procedure pg. 4
Front Panel Controls pg. 5
Operation pg. 6
Rotor Removal and Installation pg. 7
Tube Holder Configurations 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
p/n 7786021
p/n 7713031
p/n 7713033