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/cm3 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/cm3 and the temperature of the water
is between 15 and 25 °C.