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5.3 SPIN TIME/RPM TESTS
A. SPIN TIME
Spin time is factory set at 60 +/- 3 seconds. A count down of the time remaining
is displayed on the LCD. Spin time may be verified by using a stopwatch. The
motor takes less than 10 seconds to accelerate to proper rpm. Once achieved,
the spin time will be displayed on the LCD. Start timing the spin when WAIT 60
SEC is displayed on the LCD. Stop timing the spin when the motor shuts off.
B. RPM
The HemataStat II is designed to operate between 5,670 and 6,930 rpm. An
internal microprocessor continuously monitors the rpm during operation. If the
rpm should drop below the specified range, the motor will shut off, and the
message LOW RPM will display on the LCD. To verify the LOW RPM message,
press the ENT or RUN button to return to the main menu. Press the RUN
button to restart the spin cycle. If the LOW RPM message is displayed again,
refer to Section 7.
The rpm reading on the LCD should be within 2% of a tachometer reading.
SECTION 6
MAINTENANCE
6.1 CLEANING
As with all electrical devices, make sure the centrifuge is unplugged before cleaning.
Always wear protective clothing when using any cleaning materials.
NEVER USE BLEACH, ABRASIVES OR CORROSIVE SOLVENTS.
DO NOT SPRAY OR ALLOW ANY LIQUID TO GET INSIDE THE CENTRIFUGE.
LIQUID WILL HARM THE ELECTRONICS. SUBSEQUENT PROBLEMS WILL NOT
BE COVERED UNDER WARRANTY.
Use a disinfectant towelette or a cloth slightly dampened with any non-corrosive
disinfectant solution to clean the lid and other parts of the centrifuge housing. Dry all
surfaces with a soft tissue or cloth after cleaning.
The rotor should be removed and cleaned at least monthly or as required by the
laboratory protocol. Remove the rotor from the motor shaft by first unscrewing the
rotor knob. Gently lift the rotor vertically off of the motor shaft. Make sure the rotor is
thoroughly dry before reinstalling. Liquid left on the rotor will cause damage to the
device. Re-install the rotor making certain that the rotor knob is tight.
