Malvern Zetasizer Nano Series, Accessories Manual

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General cells and cuvettes Chapter 2
Zetasizer Nano accessories guide Page 2-21
To ensure a minimum sample volume is provided for the sample to be measured
but protect against overfilling, we recommend the cuvette is filled to a depth of
between
7mm and 10mm ( before the Dip cell is inserted). The minimum level
relates to approximately 0.7ml of sample.
Do not overfill the cuvette; as well as overflowing the cuvette once the Dip cell is
inserted, this can also produce thermal gradients within the sample that will reduce
the accuracy of the temperature control.
Once the Dip cell is inserted, It may be necessary tap the cell lightly to dislodge any
bubbles that may be caught between the electrodes.
Inserting the Dip cell
Insertion of the Dip cell follows the same procedure as above, but first the Dip cell
must be placed into the sample cuvette. This must be done at an angle to avoid any
bubbles being caught between the sample electrodes.

The cuvette must not be filled more than the recommended maximum
depth of 10mm

.

Tilt the cuvette to a maximum angle of 45°

.

Slowly insert the cell into the cuvette until the metal electrodes are covered

.
As the cell is inserted it displaces the sample so any bubbles will be pushed out
from the top of the electrode gap.

Once the electrodes are covered bring the cuvette up to the vertical

.

Inspect the combined cell and cuvette and check for any bubbles

. If bubbles
are present gently tap the bottom of the cuvette to dislodge these. If not dis-
lodged repeat the above sequence.

The cell can only be inserted one way round. Hold the base of the Dip cell cap
and the top of the cuvette simultaneously

. Ensure the coloured band on the
label (and cuvette triangle) is facing the front of the instrument and push the
cell into the cell holder until it stops - a ‘
stop ’ on the Dip cell must rest on the
top of the cell holder. Check that the cell sits flat on the cell holder.

When filling , tilt the cuvette and
allow it to fill slowly.

To stop bubbles forming let the
sample flow down the inside.
ill 7935