Drucker Diagnostics Model 642B Centrifuge - Manual (Page 4)

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 flow.
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 flat 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 9. For further assistance,
contact Drucker Company at 814-342-6205 or 814-692-7661.
1. Plug the centrifuge in to an approved electrical outlet. For electrical safety,
the unit must always be properly grounded.
2. Spin the rotor by hand; check for free and level rotation. If the rotor does not
spin freely, refer to page 9 on troubleshooting.
3. Place the six test tube holders inside the rotor (as shown to the
right), and verify that they are seated properly.
4. Close the lid. Rotate the lid knob clockwise to
its complete stop position.
5. Turn the centrifuge on by turning the
timer to 10 minutes.
6. The test tube holders will slide up into the
horizontal position and the unit will accelerate
to full speed.
7. 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
turning the timer to zero (o).
8. While the machine is running, try to turn the latch counterclockwise.
Power should be cut to the motor. If the motor power is not cut when the lid
latch is opened, contact The Drucker Company for assistance.
After the centrifuge has passed this procedure it is ready for operation.
Page 4
Horizontal Rotor Shown
Safety:
Horizon Lid Safety Switch: The Horizon 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.
Circuit Breaker: The Horizon 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.
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.
The Horizon Model 642B complies with all requirements of the following
standards. UL standard 61010-1
International Electrotechnical Commission standard IEC 61010-2-20
Canadian Electrical Code standard CSA/C22.2 No. 61010-1-04
Page 9
1. Problem: The rotor does not spin freely.
Solutions: – Make sure nothing has fallen into the rotor chamber.
– If there is nothing obstructing the rotor, the rotor may be damaged.
– Contact The Drucker Company for further assistance.
2. Problem: Excessive noise when the machine is running.
Solutions: – Check to see that the load is balanced.
– 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.
3. Problem: The centrifuge does not run.
Solutions: – Check the electrical outlet.
– Make sure the lid latch is turned completely clockwise to its stop
position.
– 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.
Troubleshooting:
NOTE:
The latch must be turned completely
clockwise to its stop position in
order for the centrifuge to operate.
6. Tube Holder Replacement: It is recommended that the tube holders
be replaced after 24 months of use.
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.
(Continued)