Instruction Manual |
5
8.5 Selection of operating time and momentary operation
Operation of the centrifuge begins when the Time knob is turned clockwise to set a run time. For run times less than 5 minutes, turn
the knob clockwise past the halfway point and then counterclockwise to the desired time. For run times longer than 5 minutes, turn
the knob clockwise to the desired time.
When the preselected time expires, the centrifuge will stop automatically. To stop the centrifuge prior to the expiration of set time,
turn the Time knob to the zero position.
The centrifuge may be operated manually by pressing and holding the Quick button. The centrifuge will continue to run as long as the
button is depressed.
Some models are equipped with a timer that includes a Hold position. Continuous operation of these models may be achieved by
turning the Time knob firmly to the left. The centrifuge will continue to operate until the knob is turned to the zero position.
NOTE:
The Time knob may be turned in either direction during operation of the centrifuge without damage to the timer mechanism.
9.0 Service and Maintenance
9.1 Centrifuge service
Always keep the centrifuge housing, rotor chamber, rotor and rotor accessories clean. All parts should be wiped down periodically
with a soft cloth. For more thorough cleaning, use a neutral cleaning agent (pH between 6 and 8) applied with a soft cloth. Excessive
amounts of liquid should be avoided. Liquid should not come into contact with the motor. After cleaning, ensure that all parts are
dried thoroughly by hand or in a warm air cabinet (maximum temperature 50°C).
9.2 Cleaning the rotor
The rotor should be cleaned after each use. When spinning 8 samples containing phenol or phenol chloroform, the rotor should be
cleaned immediately after use.
9.3 Disinfection
Should a spill of infectious materials occur within the rotor or chamber, the unit should be disinfected. This should be performed by
qualified personnel with proper protective equipment.
9.4 Replacing fuses
Check the fuse when it is recommended in Section 10 (Troubleshooting). The fuse holder is located in the power inlet on the rear of
the unit. Disconnect the power cord from the power inlet. Open the fuse holder drawer by inserting a small screwdriver under the
tab and prying it open. Remove the innermost (operative) fuse from its retaining tabs, and replace the fuse if necessary. A spare fuse
is located in the outermost chamber of the fuse drawer. Replace only with a fuse of exactly the same value as the original. Fuse type
may be found in Section 4 (Specifications).
10.0 Troubleshooting
Please refer to this guide before calling for service.
Problem
Cause
Solution
Centrifuge will not start
No power supply
Check that power is being supplied to the outlet.
Check that the power cord is plugged into both the wall
outlet and the back of the centrifuge.
Check that the power cord is not damaged.
Blown fuse
Check fuse and replace if necessary.
Lid lock will not release
Defective lid lock
Open manually and have unit serviced.
No power from PC board
Call for service.
Lid lock is jammed
Call for service.
Centrifuge is not receiving power
See “Centrifuge will not start”.
Centrifuge cannot be started,
although power is On
Lid not closed correctly
Close lid correctly.
No speed or time has been selected
Set Speed and/or time.