53
EN
14.2.1
Cleaning at the End of a Measurement Cycle
At the end of your measuring cycle clean your
SG-Ultra Max
thoroughly
before you store it. You do not need to dry the measuring cell (assuming
that you make sure the cleaning liquid does not freeze in the measuring cell).
You can leave deionized water in the measuring cell when storing the
instrument for a day.
14.2.2 Cleaning Visible Residues in the Measuring Cell
Some samples like wort or grape juice may cause residues in the measuring
cell after longer measurement periods. In this case use an enzymatic lab
cleaner to remove the residues from the cell (see recommendations below).
14.2.3 Recommended Cleaning Agents
For cleaning the instrument, use two cleaning liquids:
• Cleaning liquid 1 dissolves and removes sample residues in the
measuring cell. It has to be a good solvent for all sample components.
NOTICE
If you want to dry the measuring cell with compressed air, do not apply an
overpressure of more than 1 bar.
WARNING
The mixture of concentrated sulfuric acid with water will cause a very
strong exothermic reaction which may destroy the measuring cell and/or
cause serious injuries.
• Never flush out concentrated sulfuric acid with water.
• Ensure that samples of very different concentrations do not come into
contact with each other. Therefore remove 98 % H
2
SO
4
only with
70 % H
2
SO
4
, and remove 70 % H
2
SO
4
with 40 % H
2
SO
4
. Then water
may be used to rinse the measuring cell.
• Always use separate waste containers for sulfuric acid waste and
ethanol (or other solvent) waste. Label the waste containers properly to
avoid mix-ups.
• Never flush sulfuric acid waste and ethanol (or other solvent) waste
down the sink.
• Always dispose of the waste according to regional laws and
regulations.
• Place the waste containers behind a safety shield and in a catch basin.
