7 Performing a Measurement
16
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7.2 Filling Sample
You can fill the sample with a syringe or with an
optional peristaltic pump. See the manual of the
peristaltic pump for instructions on its installation
and use.
To achieve highly accurate measuring results, fill
the sample into the measuring cell steadily and
without bubbles.
TIP:
Sample containing dissolved CO
2
will cause
bubbles in the measuring cell, which render the
measurement results invalid. Degas your sample
carefully as described in section 7.5.
Sample amount
If the measuring cell is clean and dry, you need
approx. 2 mL of sample.
If you measure without cleaning and drying between
samples, you will need a higher amount of sample,
because you have to flush residues of the previous
sample out of the measuring cell to avoid cross-
contamination.
Bubble detection – FillingCheck™ and
U-View™ (live camera image)
FillingCheck™
(see section 6.3.6) helps you detect
bubbles during filling. Activate the function in the
measurement settings.
Additionally check the filling visually by means of the
built-in live camera (
U-View™
):
• Place the camera widget on the dashboard
assigned to your measurement.
• Watch the live camera image on the dashboard
during filling:
- Tap on the image to open the camera screen.
- Tap
to zoom in, tap
to zoom back out.
- You can drag the zoomed image left or right
to examine all parts of the measuring cell.
- Tap
to close the camera screen.
The camera image will be saved with the measure-
ment results.
WARNING
Risk of injuries and fire by liquids leaking
Filling samples and cleaning liquids that the
wetted parts are not resistant to will corrode the
wetted parts. Sample leaking from corroded parts
may cause serious injuries.
Before you fill any sample or cleaning liquid, in
particular hazardous or flammable chemicals,
into the instrument:
• Strictly follow all safety instructions concerning
the use of chemicals and the use of flammable
chemicals, see section 1.
• Make sure that all wetted parts are resistant to
the filled-in liquid, see appendix A.3.
Consider also the wetted parts of installed
options.
• Make sure that you have suitable cleaning
liquids at hand for cleaning the measuring cell,
see section 9.1.
NOTICE
Corrosive samples require special care
Samples with a moderate tendency to corrode
borosilicate glass, such as strong alkali solutions
(e.g. caustic soda), can be measured with the
instrument. However:
• Remove corrosive samples immediately after
measurement and rinse the measuring cell
thoroughly.
• Check the validity of the adjustment more
frequently than generally recommended.
• The measuring temperature for strong alkali
solutions should not be higher than 20 °C
(68 °F). Higher temperatures dramatically
increase the speed of corrosion.
NOTICE
Proceeding in case of instrument leaks
If liquid leaks from the draining hole by the
sample inlet:
• Perform a leak tightness test as described in
• If the leak tightness test fails, contact your local
Anton Paar representative.
NOTICE
Some organic solvents such as toluene, xylene
or acetone may etch the instrument housing.
Usually this occurs due to spilled sample or
cleaning liquids.
• Remove any spilled liquids immediately as
described in section 10.2.
• Use the protective cover in the case that spilling
occurs.
• Detach the syringe holder from the instrument
housing and position it at the side of the
instrument to prevent etching on the housing
where the syringe holder is located.
