OHAUS Frontier FC5917RF Manuel D'instructions page 31

EN-22
TM
Frontier Centrifuges
For high-speed centrifuges that can achieve between 20,000 and 30,000 rpm but also for FC5917RF model there is an
additional safety feature.
For rotors used with FC5720R, FC5830R, FC5917RF Centrifuges, apart from the limited-service time provided in
years, the software will also count the number of cycles. After reaching a given number of centrifugation cycles, the
usage of a particular rotor will no longer be possible for safety reasons. There will be a warning with an Error 90
message.
Error 90 indicates that the maximum life cycles of the installed rotor will be reached soon, and the rotor should be
replaced in time. This message occurs for the first time when there are 500 cycles of the affected rotor remaining.
In the display "rpm/rcf" (A-1), the message "500 LEFT" is shown (See figure 40).
Figure. 40
This error can be acknowledged using the "stop" button (10), and from now on, it occurs every 50 cycles for the
affected rotor. If the maximum permitted cycles of a rotor are reached, error 91 occurs. The rotor can no longer
be operated and must be replaced. Please refer to Table 8, "Table of the service life of rotors," for details regarding
service time in years and in cycles. The maximum number of cycles is defined by the manufacturer and cannot be
changed.