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NOTE
!
CAUTION
Maintenance
Required maintenance measures
Regular maintenance is necessary to ensure trouble-free opera-
tion of the instrument (every six to twelve months)!
At least carry out the maintenance work described in the following
section on a regular basis when
the instrument displays the following error messages:
"Insufficient/Excessive light", "Low water level" or "Low indicator
level"
the last maintenance was carried out no more than six months
ago.
Cleaning measures
Never use organic solvents to clean the measuring chamber or
other plastic parts!
Always observe the safety regulations when handling cleaning
agents!
As a result of continuous operation, a coloured film may form on
the sight-glass windows. Use isopropanol to remove this sticky
film.
Replace the following components at the respective interval:
Component
Replacement interval
•
if LED E4 flashes with "pump head mainte-
Pump head
nance"
•
Motor block
Replace together with pump heads.
•
Measuring
Check for cleanliness and tightness (see page
chamber
41).
Service instructions
The surface of the instrument has not been treated. Therefore, avoid
any soiling caused by indicators, oil or grease. However, if the hous-
ing becomes soiled, please clean the surface with a commercial plas-
tics cleaner (never use other solvents).
Maintenance
39
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