7 Performing a Measurement
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7.2.1 Filling with a Syringe (Luer Tip)
IMPORTANT:
Do not use syringes that contain
lubricants. The lubricants can dissolve into your
sample and lead to a systematic measuring error.
Filling position
• To achieve best measurement results, fill with
the syringe attached to the syringe holder.
This is the standard filling position.
•
Only in the case that the available amount of
sample is very limited:
- Remove the adapter Luer 1/4" UNF from the
syringe holder (1, fig. 2) and screw it into the
sample inlet (4, fig. 2) of the instrument
(instead of hose 3, fig. 2).
- Use a 2 mL syringe for filling.
To fill with a syringe (Luer tip)
1. Connect the syringe (filled with sample) to the
adapter Luer 1/4" UNF (1, fig. 2) on the syringe
holder (or to the adapter mounted directly at the
sample inlet of the instrument).
2. Push the plunger of the syringe slowly and
steadily until a drop emerges from the sample
outlet adapter.
3. Leave the syringe in the filling position during
the measurement.
7.2.2 Filling with Optional Peristaltic Pump
See the manual of Xsample 200 High-Resistance.
7.3 Measurement Procedure
IMPORTANT:
If the adjustment temperature differs
from the measuring temperature, give the measur-
ing cell sufficient time for conditioning (approx.
1 hour per 10 °C/18 °F difference).
See section 8.2 for recommendations when to
perform an adjustment before a measurement.
Particularly after temperature jumps the measure-
ment results will be slightly drifting before they
become stable. This is due to the intrinsic properties
of glass, which the measuring cell is made of.
If you want to achieve best measurement results,
give the measuring cell and sample enough time for
temperature conditioning.
• As a rule of thumb allow for a conditioning time
of 1 minute per every 10 °C (18 °F) difference
between the temperature of the filled sample
and the set measuring temperature.
• Additionally set a hold time (see section 6.3.4) of
4 min (DMA 501) / 5 min (DMA 1001) if you do
not check density stability in your measurement.
If you measure density that is not viscosity-correct-
ed, allow for a longer conditioning time: approx.
5 min if you check density stability, or approx. 10 min
if you don’t.
Initiating the measurement
• When you have verified that all measurement
settings are correct, and the sample has been
filled, tap
MEASURE
.
The measurement will be performed according
to your settings. The progress bar shows the
progress of the measurement.
When the measurement is finished, the results
are displayed.
The results together with the camera image and
a time stamp are automatically saved in the
data memory.
• Tap
WARNING
Risk of injuries by dangerous liquids leaking
or spurting out
If you push the plunger of the syringe too hard,
or if, e.g., the measuring cell breaks, dangerous
liquids may leak or spurt out of ruptures causing
injuries.
• Wear safety goggles and protective gloves
when you fill dangerous liquids.
WARNING
Risk of fire and poisonous substances
In the very rare case of a malfunction of the
temperature control, the measuring cell could
heat up to 150 °C (302 °F).
• Set the safety temperature limiter (9A, fig. 1) on
the rear of the instrument to a temperature that
is safe for your sample (use a screwdriver).
