Hettich Rotolavit II User Manual

Hettich AG, Seestrasse 204a, 8806 Baech, Switzerland Operator_Manual_Rotolavit II_und_Rotolavit II-S_en_rev2.5
Seite 42
11 Centrifugation of materials or mixtures of materials with a
density higher than 1.2 kg / dm3
When centrifuging with max. revolutions per minute, the density of the materials or the material mixtures may not
exceed 1.2 kg/dm
3
.
The speed must be reduced for materials or mixtures of materials with a higher density.
The permissible speed can be calculated using the following formula:
e.g.: maximum speed RPM 3500, density 1.6 kg/dm
3
In the exceptional case that the maximum loading indicated on the hanger is exceeded, the speed must also be
reduced.
The permissible speed can be calculated using the following formula:
e.g.: maximum speed RPM 3500, maximum load 300 g, actual load 350 g
If in doubt you should obtain clarification from the manufacturer.
12 Maintenance and servicing
The device can be contaminated.
Pull the mains plug before cleaning.
For safety reasons, you must wear gloves and a respiratory mask when cleaning the
equipment used for blood processing.
Before any other cleaning or decontamination process other than that recommended by the
manufacturer is applied, the user has to check with the manufacturer that the planned process does
not damage the device.
 Centrifuges, rotors and accessories must not be cleaned in rinsing machines.
 They may only be cleaned by hand and disinfected with liquids.
 The water temperature must be between 20 – 25°C, 68°F – 77°F.
 Only detergents/disinfectants may be used which:
 have a pH between 5 - 8
 do not contain caustic alkalis, peroxides, chlorine compounds, acids and alkaline solutions
 To prevent appearances of corrosion through cleaning agents or disinfectants, the application guide from the
manufacturer of the cleaning agent or disinfectant must be heeded.
 Certain preservation agents in acid-free saline solutions can cause long-term damage to the plastic parts in
the device. Regular cleaning prevents salt deposits and lengthens the life span of these parts.
reduced speed (nred) =
√
1.2
greater density [kg/dm
3
]
x maximum speed [RPM]
nred =
√
1.2 kg/dm
3
1.6 kg/dm
3
x 3500 RPM = 3031 RPM
reduced speed (nred) =
√
maximum load [g]
actual load [g]
x maximum speed [RPM]
nred =
√
300 g
350 g
x 3500 RPM = 3240 RPM

Hettich Rotolavit II Specifications

General

Brand	Hettich
Model	Rotolavit II
Category	Laboratory Equipment
Language	English