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3-1-2 Rotor and Tube Preparations and Precautions
The CP-NX series centrifuges allow you to balance samples, by eye. The difference between
meniscus levels of opposing samples must be less than 5 mm (Fig. 3-1-2), but some rotors are
exceptions.
However, some tube and bottle may in certain rotor and sample combinations trigger an imbalance
alert. If this happens, balance the samples more accurately.
(1) Tubes
Note that partially filled tubes may impose speed limitations or lead to tube failure with some rotors.
Tubes or bottles must be full in the following cases:
1. When thin tubes or seal tubes are used.
2. When thick tubes are loaded in a swing rotor.
3. When a bottle is used 100,000 x g or more.
For more information on rotor and tube handling, read through the "Rotor, tube, bottle and cap
instruction manual " and the instruction manual supplied with the rotor.
Fig. 3-1-2 Balancing samples
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3-1-2 Rotor and Tube Preparations and Precautions
(2) Bottles
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