7 Performing a Measurement
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-
DONE
to close the results and finish or
-
REMEASURE
to perform another
measurement with the same settings.
7.4 Data Management
Saved data can be accessed in the data explorer:
- Measurements
- Checks
- Adjustments
- Products
- Audit trail (if activated)
1. Select
Data Explorer
in the menu, then
select one of the available data categories.
2. Select one of the saved data sets to see it.
Tap
to export a report, tap
to print it.
Find details in the reference guide.
7.5 Degassing Samples
There are various methods to degas liquid samples.
The preferable method for your application depends
on the kind of sample and the amount of gas that is
dissolved in the sample. Pay attention to always
treat all samples the same way in order to get repro-
ducible measuring results.
IMPORTANT:
Be aware of the fact that the compo-
sition of some samples may slightly change during
the pretreatment due to the evaporation of volatile
components.
Using a syringe
1. Fill the syringe with the sample and place a
finger on it’s opening.
2. Pull the piston to create a vacuum and release
the finger to discharge the gas.
3. Repeat this procedure at least three times to
make sure that no gas is left in the sample.
TIP:
The used syringe needs to be large enough to
leave some space for creating the vacuum. Only up
to two thirds of the syringe should be filled up.
Boiling the sample
1. Boil the liquid for several minutes to remove
dissolved gas.
2. Fill the boiled liquid into a clean glass flask and
cover it.
3. Wait until the liquid has cooled down approxi-
mately to measuring temperature.
Stirring the sample
• Stir your sample vigorously for 5–15 minutes
(depending on the stirring equipment) until
bubbling ceases.
• You can pour the sample through a paper filter
after stirring to degas it even more efficiently.
Using an ultrasonic bath
• Put your sample for approx. 5–10 minutes into
an ultrasonic bath until bubbling ceases.
7.6 Special Filling Techniques
See the reference guide for a discussion of special
filling techniques concerning the following kinds of
samples:
- bubbling samples
- suspensions and emulsions
- highly viscous samples
- pastes
- liquids in aerosol cans
WARNING
Health risk with toxic components
Samples containing toxic volatile components
can cause irritation and serious injuries to your
eyes, skin, and mucous membranes as well as
toxication.
• If your sample contains volatile components
that are toxic, always handle it in an appropriate
environment like under a fume hood, particu-
larly when you boil your sample.
WARNING
Risk of fire and burns with flammable liquids
When you boil flammable liquids, there is a risk
of fire. Serious injuries are possible.
• Do not boil flammable liquids.
