Thermo 6464K, Инструкция по эксплуатации

Страница: 14 / 24

OM6464K Rev. 4 11 January 2004 Page 14 of 24
4.3 Derating Tables for Dense Samples
The Speed and Force Tables list the maximum speed for each rotor/adapter combination for the IEC Centra CL5 Series
cetrifuges. These speeds are specified for samples whose specific gravity is not greater than 1.2 for swinging bucket
rotors.
For denser samples, the maximum specified speed in RPM is reduced (derated) by a factor from the table below:
Derating Example: A rotor rated for 4,000 RPM used with samples with a specific gravity of 1.4, cannot spin faster than
3,700 RPM. (4,000 x .925 = 3,700)
Specific gravities greater than 3.0.
This table is based on the formula:
Use the same formula to compute derating factors for specific gravities greater than 3.0.
• S
0
is the maximum specific gravity allowed before derating (1.2).
• S
a
is the actual specific gravity of the sample.
CAUTION
!
Do not exceed the rated speed or specific gravity. Higher speeds or specific gravities will impose unnecessary wear on
the centrifuge and can cause rotor failure. Wear and damage caused in this manner are not covered under warranty.
Derating Factor for:
Specific Gravity Swinging Bucket
1.2 1.000
1.3 .960
1.4 .925
1.5 .894
1.6 .866
1.7 .839
1.8 .816
1.9 .794
2.0 .774
2.1 .755
2.2 .738
2.3 .721
2.4 .707
2.5 .692
2.6 .678
2.7 .666
2.8 .654
2.9 .642
3.0 .632
( / ) S S
o a