Anton Paar 84138, Instruction Manual

Page: 62 / 162

62 C96IB01
EN
12 Readjustment
To ensure accurate results it is necessary to clean the measuring cell before and after
each measurement series. If the measuring cell is not sufficiently cleaned, residue
can form in the measuring cell. This can be noticed if the density values for deionized
water begin to deviate. Therefore, perform regularly check measurements with
deionized water.
If the density values for water deviate by more than ±0.001 g/cm 3 at the given
temperature from the table values (see Appendix A), then a readjustment is required.
A readjustment is only possible if the calculated difference between the measured
and the theoretical value is smaller than 0.01 g/cm
3 and the temperature of the water
is between 15 and 25 °C.
12.1 Check Measurement
1. Clean the measuring cell as described in Chapter 10.1 and rinse the measuring
cell until no more solvent residues are present.
2. Select the measuring unit "Density" (see Chapter 9.1).
3. Fill the measuring cell with deionized water and perform a measurement (see
Chapter 9.6 and 9.7).
4. Compared the measured density value with the table values (see Appendix A).
5. If the measured density value deviates more than 0.001 g/cm
3
from the table
value, perform a readjustment.
12.2 Water Adjustment
One option is to readjust using deionized water.
1. Clean the measuring cell as described in Chapter 10.1 and rinse the measuring
cell until no more solvent residues are present.
2. Press <Menu> and select "Adjustment > Water Adjustment" .
3. Fill the measuring cell with deionized water at approx. 20 °C (15 to 25 °C)
without bubbles.
4. Confirm with <OK> that the measuring cell is filled with deionized water.
The density value of the filled deionized water is now measured and compared
with the adjustment data. The display shows the calculated deviation (Delta) in
g/cm
3 .
5. Press <OK> to activate the new adjustment.