9 Upkeep and Cleaning
E15IB001EN-N
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9 Upkeep and Cleaning
To ensure a constant and high accuracy of your
measurements, employ a regular and effective
cleaning routine, and store the instrument under the
recommended conditions.
9.1 Cleaning and Drying the
Measuring Cell
Cleaning frequency
Clean and dry the measuring cell at least after each
working day or working shift.
Cleaning more frequently can be necessary...
- before you perform adjustments,
- before you measure a sample that is not
miscible with the previous sample (e.g. water
after a petrochemical sample),
- before you want to measure using a minimum
sample amount,
- before you measure a sample that could
chemically react with the previous sample.
Cleaning liquids
Employ two cleaning liquids in a row:
• Cleaning liquid 1 dissolves and removes sample
residues in the measuring cell. It has to be a
good solvent for all sample components.
• Cleaning liquid 2 removes cleaning liquid 1 and
is easily evaporated by a stream of dry air so
that drying of the cell is accelerated. Cleaning
liquid 2 has to be a good solvent for cleaning
liquid 1.
If you are not sure whether a cleaning liquid is suit-
able for your sample, perform a preliminary test in a
test tube to see if any phase separation, precipitate
or opalescence can be observed.
Cleaning and drying procedure
IMPORTANT:
Observe all safety instructions given
in section 7.2 that are applicable for cleaning agents.
See the manual of Xsample 200 High-Resistance
for a description of the cleaning and drying proce-
dure with the optional peristaltic pump.
1. Select
Cleaning
in the menu.
2. Rinse the measuring cell with cleaning liquid 1
(minimum 5 mL).
If your sample is viscous or contains particles,
use more cleaning liquid.
3. Empty the measuring cell (by filling air).
4. Rinse the measuring cell with cleaning liquid 2
(minimum 5 mL).
5. Empty the measuring cell.
IMPORTANT:
Consider to install a drying cartridge
(see reference guide) if the instrument’s condition
monitoring shows a warning.
6. Connect the adapter Luer cone of the air pump
hose to the adapter Luer 1/4" UNF on the
syringe holder (1, fig. 2) (or at the sample inlet).
7. On the
Cleaning
screen, tap
to start the air
pump.
8. Wait until the measuring cell is dry (stable
density reading).
The time needed depends on the vapor pres-
sure of your cleaning liquid 2 and the tempera-
Table 3: Recommended cleaning liquids
sample
liquid 1
liquid 2
aqueous samples,
beverages
water
non-denatured
ethanol
petrochemical
samples
petroleum
naphtha
acetone
WARNING
Risk of injuries and fire by liquids leaking
Before you fill any sample or cleaning liquid, in
particular hazardous or flammable chemicals,
into the instrument:
• Strictly follow all safety instructions concerning
the use of chemicals and the use of flammable
chemicals, see section 1.
• Make sure that all wetted parts are resistant to
the filled-in liquid, see appendix A.3.
Consider also the wetted parts of installed
options.
NOTICE
Risk of damaging the measuring cell
Do not use any mechanical action for cleaning
the measuring cell.
