OM31150 Rev. 5 11 January 2004
Page 17 of 24
Hemato-Kit Rotor 930
(Use requires 1116 hublock adapter on 50968 tapered
shaft adapter)
The 930 Hemato-Kit can convert the IEC CL3 Series into a micro-
hematocrit centrifuge, providing a simple, economical way to perform
occasional hematocrits. Blood cells are packed in about ten minutes, at
7800 RPM/6200 xg. Kit includes numbered 24-place rotor for 1.75 x 75
mm capillary tubes, 1505 gasket for tubes, cover, hublock adapter and
wrench
for installing rotor. An accessory microcapillary tube reader available, to
complete the system.
Order Cat. No. 930 Hemato-Kit and Cat. No. 2201 Microcapillary Tube
Reader.
4.3 Derating Tables for Dense Samples
The Speed and Force Tables list the maximum speed for
each rotor/adapter combination for the IEC CL3 Series.
These speeds are guaranteed, for samples whose specific
gravity is not greater than:
• 1.2 for swinging bucket rotors
• 1.5 for fixed angle rotors
For denser samples, the maximum guaranteed speed is
reduced (derated) by a factor from the table below:
Derating Example: An angle rotor, rated for 10,000 RPM,
used with samples with a specific gravity of 1.6, cannot
spin faster than 9,670 RPM. (10,000 x .967 = 9.670)
Specific gravities greater than 3.0. This table is based on
the formula:
You can use the same formula to compute derating factors
for specific gravities greater than 3.0.
• S
o
is the maximum specific gravity allowed before
derating (1.2 or 1.5, depending on the type of rotor.
• S
a
is the actual specific gravity of the sample.
Specific Gravity Swinging Bucket Fixed Angle
1.2 1.000 1.000
1.3 .960 1.000
1.4 .925 1.000
1.5 .894 1.000
1.6 .866 .967
1.7 .839 .939
1.8 .816 .912
1.9 .794 .888
2.0 .774 .866
2.1 .755 .844
2.2 .738 .825
2.3 .721 .807
2.4 .707 .790
2.5 .692 .774
2.6 .678 .758
2.7 .666 .744
2.8 .654 .731
2.9 .642 .719
3.0 .632 .707
(/)SS
oa
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.
244 Rotor
The 244 rotor is designed for centrifugation of multi-well
microplates. The weight of the loaded microplates must be
equally distributed between the rotor’s two carriers. The
maximum rated speed for the 244 rotor, when each of the
carriers is loaded with 280 grams (total load of 560 grams),
is 4000 rpm.
CAUTION
!
Loads greater than 280 grams (weight of the microplate
and sample) must have maximum speed derated
(according to the following table), to avoid rotor failure.
Derating Table for 244 Rotor
Load per Carrier
(grams)
Max. Speed
(rpm)
280 4000
300 3600
320 3300
340 3000
360 2800
380 2600
400 2400
450 1900
500 1400
600 800
Greater than 600 do not use
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