Malvern Zetasizer Nano series Self Installation And Quick Start Manual page 12

6. The test runs - pass or fail?
Each test should take no longer than about six minutes.
After a two minute equilibrating period, the window will
a.
show the test running, like this:
If the instrument runs just one test type (Size or Zeta Potential) and this passes, it's set up correctly.
If testing both Size and Zeta Potential, after the Size test the instrument prompts for the capillary cell
for the Zeta Potential test. Go back to step 5. The instrument is only set up correctly if both tests
pass.
Note: the results will be stored as a record in the measurement file Installation test.dts.
In case of failure....
If a Failure message is displayed for either test type, repeat the measurement as described here.
Insert a new sample in a new cuvette/cell and measure it, ensuring that:
a.
The correct cell type is used.
The measurement chamber lid is closed properly.
There are no bubbles in the sample.
The cell is clean and free from fingerprints, grease and dust.
In addition, for a Size test:
b.
Check that between 1.0mL and 1.5mL is injected into the cuvette (giving a sample depth of 10mm
to 15mm as shown in Step 4 above).
Check that the triangle on the cuvette faces forward (see step 5 above).
In addition, for a Zeta potential test:
c.
Wet another cell thoroughly using ethanol or methanol as described earlier, then check that there
are no scratches on it. Wipe it dry with a lint-free cloth (we recommend camera lens cleaning
pads). Do not try to clean the optical area on the front of the "U" part of the cell as this will
cause small scratches which can distort the result.
Check that the capillary cell is full.
Ensure that the cell plugs are inserted firmly.
Finally....
If the test continues to fail, contact the local Malvern representative (before calling make a note of the
instrument's serial number.)
The test reports whether the system
b.
passed or failed, using a dialogue
like these:
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