Happenings When Power Failure Occurs - Hitachi CP100NX Instruction Manual

3-5 Happenings when Power Failure Occurs

3-5 Happenings when Power Failure Occurs
DANGER: To avoid electrical shock hazards, follow below when servicing the centrifuge.
1) Be sure to turn off the POWER switch and turn off the distribution board of your
2) Be sure to turn off the POWER switch and unplug the power cord from the receptacle
WARNING: (1) Never open the door during rotation.
(2) Never touch the rotor during rotation.
CAUTION: Do not perform any operation not specified in this manual. If any problem is found on your
centrifuge, contact a Hitachi Koki authorized sales/service representative.
1. Rotation of the rotor
The rotor coasts to a stop. If the power is restored when the current speed is more than 500 rpm, the
rotor will be automatically accelerated to the set speed. If it is restored when the current speed is less
than 500 rpm, the rotor will decelerate to a stop.
2. Displays on the panel
During the power failure, all the displays on the control panel are off. When the power is restored, the
centrifuge will restart the control of the run with the set parameters that were in effect before the power
failure (battery-backed), and will report the occurrence of the power failure by lighting up the alert
message.
3. Removing the rotor from the ultracentrifuge
If the power failure is continuing for a long time, and you have decided to remove the rotor from the rotor
chamber during the power failure, then take the following procedure.
(1) Check that the rotor is at rest. Listen carefully for any sounds coming from the drive.
WARNING: Make sure that the rotor has coasted to a complete stop. When the rotor is at rest, it make
no sound. So listen carefully for any sound coming from the rotor chamber.
Do not attempt to unlock the door forcefully while the rotor is spinning.
It takes 10 hours or more for the running rotor to stop completely because the rotor
chamber is depressurized and has less air to stop the rotor. Be sure to leave sufficient
time before opening the door of the rotor chamber.
centrifuge room if your centrifuge is equipped with a three wire power cord. Then wait
at least three minutes and then remove the covers from the centrifuge.
if your centrifuge is equipped with a power cord with a plug. Then wait at least three
minutes and then remove the covers from the centrifuge.
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