Anton Paar DMA 35N, Instruction Manual

Page: 31 / 168

B46IB01 33
EN
10 Readjustment
• Proper cleaning of the measuring cell is required before and after each series of
measurements.
• Poor cleaning can result in the formation of deposits in the measuring cell. This
can cause offsets of the density readings, and can be recognized by measuring
distilled water.
• If the density value deviates more than ±0.001 g/cm 3 from the theoretical value
(see Appendix B), then a readjustment may be necessary.
• A readjustment is only possible if the density difference between measured and
theoretical value is below 0.100 g/cm
3 , and the water temperature is between 15
and 25 °C.
How to readjust:
1. Clean the measuring cell with a suitable cleaning agent until no more residues or
deposits are visible.
2. Remove the cleaning agent completely from the measuring cell.
3. Fill distilled water of approx. 20 °C into the measuring cell, carefully avoiding the
introduction of bubbles. The ambient temperature should be between 15 °C and
25 °C.
4. Turn the instrument off. Turn the instrument on again, pushing both the "ON/
OFF" key and the "Recall/Delete" key at the same time.
5. The measured density and "ADJ" are displayed.
The water temperature has to be between 15 and 25 °C, the density must be
between 0.900 and 1.100 g/cm
3 .