NUVE NF 800 - Safety Interlock System; Imbalance Detection System; Manual Lid Opening

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 When the speed display shows ”0000”, the start led (10) turns off, the “end” expression
appears and the lid led (9) turns on. The user is warned by an intermittently sounding alarm.
 Push the LID button (8) to open the lid.
You may leave the centrifuge at stand-by position.
NOTE 1 :
You may display the RPM or RCF value on the speed display during the run by
pushing the function button.
NOTE 2 :
You may see all set values during the run by pushing the value increase key.
NOTE 3 :
At hold position, the rotor keeps spinning until the STOP key (7) is pushed.
After the STOP has been pushed, the rotor brakes according to the set brake
rate,
NOTE 4 :
The centrifuge waits at the stand-by position with the program values of the
last program.
NOTE 5 :
Please open the lid after every operation, otherwise the centrifuge cannot be
run again.
5.5 SAFETY INTERLOCK SYSTEM
The safety interlock system prevents opening of the lid when the rotor is spinning.
The centrifuge does not operate until the lid is closed and the lid remains locked until the rotor
stops spinning. The “Lid Open” indicator turns on to warn the user if the lid is not closed properly.
NOTE:
If power failure occurs, access to the samples is possible by opening the lid with a
special tool. Please see the manual lid opening section (3.6.) for further information.
5.6 IMBALANCE DETECTION SYSTEM
 The imbalance detection system of the NF 800 / NF 800 R centrifuges operates electronically
when an unacceptable imbalance occurs. In this case the brake is applied immediately.
 The “Err 1” imbalance error is displayed and the imbalance indicator turns on. The lid can not
be opened until the rotor stops spinning. The centrifuge can only be started after the lid has
been opened and the rotor has been re-loaded correctly.
 To avoid facing imbalance problem, please make sure to insert the tubes correctly.
5.7 MANUAL LID OPENING
In case of power cut or any breakdown, the centrifuge can be opened manually to access the
samples.
To open the lid manually :
 Switch off the instrument.
 Insert the manual lid opening tool into the hole on the left side of the instrument (see the
general view drawing).
 Push the tool keeping it horizontal until the lid opens.
WARNING !!!
Before opening the lid manually, make sure that the rotor already stopped spinning. Upon opening
the lid, lift it by hand and observe the rotor. If the rotor is still spinning, close the lid and wait
approximately 10 minutes before repeating the operation. This operation must be carried by
someone who is informed of the danger and of the precautions which must be undertaken.