Du Pont SORVALL RC-5 Service Manual page 135

P/N: 50589-3
INSTRUCTIONS
RC-5B / RC-5C Preventative Maintenance Kit
(Kit Catalog No. 12010)
5. Start the centrifuge by depressing the "Start" indicator and observe the
following:
a. Door light goes out.
b. The centrifuge motor starts and speed is indicated on the speed
meter. and stabilizes at 5,000 rpm.
c. The compressor starts and after approximately 5 minutes the
temperature indicator reaches the blue set point. The compressor
should then shut off and restart after the temperature rises above
the blue set point.
6. Check the maximum motor current and the maximum speed as fol-
lows:
a. Set the centrifuge speed to the maximum speed for the rotor that is
being used.
b. As the rotor accelerates check the motor current using a clamp on
ammeter. The maximum current should be 16.5 amps. If the motor
current is not 16.5 ± 0.5 amps adjust the current by adjusting the
torque trimming potentiometer.
c. After the centrifuge speed has stabilized insure that the indicated
speed matches the set speed. If the speeds do not match calibrate
the speed following the procedure outlined in the RC-5B Service
Manual.
7. Set the centrifuge timer for 5 minutes and allow the centrifuge to stop
once the timer reaches 0 minutes. The sentrifuge should brake to a
stop and the door light should illuminate when the rotor reaches 0 rpm.
8. Open the centrifuge door and insure that the rotor is fully stopped.
RC-5C:
1. Connect the power cord to the mains power supply.
2. Set main circuit breaker, POWER switch, to ON.
for the
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